City of Cambridge€¦ · 19/10/2020 · City of Cambridge 795 Massachusetts Avenue, Cambridge,...

PURCHASING DEPARTMENT COLEEN CASELLA

Assistant Purchasing Agent for

Goods & Services

Elizabeth Unger NATALIE SULLIVAN Purchasing Agent Assistant Purchasing Agent for

Design & Construction

City of Cambridge

795 Massachusetts Avenue, Cambridge, Massachusetts 02139 Voice: 617-349-4310 Fax: 617-349-4008 TTY: 617.349.4242

TO: All Bidders FROM: City of Cambridge DATE: October 19, 2020 RE: File No. 9400 – River Street Fire House Renovation – Addendum No. 3

This addendum is comprised of:

1. Questions and Answers 2. Changes to Project Manual, 3. Changes to Technical Specifications 4. Changes to Drawings

The following questions were asked and answered: Question: As a GC Can we quote the entire project filing sub bids quotes for each trades individually or does the city need each trade to file on its own? Answer: A general contractor may also submit a filed sub-bid, provided that the general contractor has been certified by DCAMM in the sub-bid category of work, customarily performs the work covered by the sub-bid category with its own employees and is qualified to perform the work. You will have to submit a complete sub-bid form for each Filed Sub Trade you are bidding on. Question: Is this a union job? Answer: Please see project manual page 00100-7 #9 Award of Contract. Question: I wanted to know if the (River Street Fire House Renovation) project is going to need a nitrogen generator for the dry system listed in the spec? Answer:The Project will not require a nitrogen generator for the dry system. Question: Please provide liquidated damages for this project if applicable. Answer: This job does not have liquidated damages.


Question: Please advise which forms are to be submitted with Filed Sub-Bids. Answer: Here is the list of forms to be submitted with filed sub-bids. • a completed filed Sub-Bid form; • a Bid deposit; • DCAMM Certification Form and Update Statement • Cambridge Responsible Employer Plan Subcontractor’s Certificate (City of Cambridge form for projects over $100,000 only, where filed sub-bid is over $25,000).– Please see Form Attached • OSHA Certification Form • CORI Compliance Form • Americans with Disabilities Act • Wage Theft Prevention Certification

Question: Div4, I see that an alternate is listed on the filed sub-bid form, but I don’t see a section about alternates and nothing shown on the plans. Please confirm that there are not alternates on this project.

Answer: There are no alternates. Question: Could you please provide the subcontractor insurance requirements for this project? Answer: The City does not have contracts with the subs. The insurance requirements apply to the General Contractor.

Question: Please provide the Seismic Design Category. If designated as Seismic Design Category “A” or “B” will seismic bracing and related scope be required for the fire protection scope 210000? Per the Mass State Building Code 780CMR 9th Edition, and ASCE 7 (2010) (paragraph 13.1.4.4), seismic bracing may be eliminated in buildings that fall under Seismic Design Category "A" or “B”. Except in specific cases like Emergency shelters, or the like. Answer: The seismic design is category C. Seismic restraints are required for plumbing and fire protection.

Question: Please confirm who owns the tapping of the existing water main in the street for the connection of the new fire service. Will the site contractor be responsible for the tapping of this main?

Answer: Division 21 owns the new connection by cuting in an anchor tee.


Question: We are hoping glass dimensions can be provided for Door Types B and D on Drawing A8.1. Answer: Refer to the attached SKA-05. Question: There are doors noted on the Door Schedule, Drawing A8.1 to be C-Label fire rated doors. There is no fire rated glass specified in Section 088000 - Glass and Glazing. Is fire rated glass required? If so, please provide fire rated glass product requirements. Answer: Refer to the attached Section 088000 – Glass and Glazing. Question: Door EX03 is shown on 9B/A6.1 with a note for the transom stating "hollow metal door and frame with spandrel panel in transom - refer to door schedule." There is no specification for a spandrel panel in Section 088000. Is Section 088000 providing this panel? If so, please provide specification. Answer: Refer to the attached Section 088000 – Glass and Glazing.

The following are changes to the Project Manual

Item 3.7 Section 000001, Table of Contents - RE-NUMBER Section 084216 to read "Section 084213 Aluminum-Framed Storefront & Entrances".

The following are changes to the Technical Specsifications

Item 3.8 All relevant Sections - Replace all references to "Section 084216, All-Glass

Entrances and Storefronts" with "Section 084213, Aluminum-Framed Storefront & Entrances". Item 3.9 Section 084216, All-Glass Entrances and Storefronts - DELETE in its entirety

and REPLACE with the attached "Section 084213, Aluminum-Framed Storefront &

Entrances". Item 3.10 Section 088000, Glass and Glazing - ADD in its entirety and REPLACE with the

attached "Section 088000, Glass and Glazing". Item 3.11 Section 124816, Entrance Floor Grilles - DELETE in its entirety and REPLACE with the attached "Section 124816, Entrance Floor Grilles".

Item 3.12 Fire Protection Specification 210000, Part 1.03 DESCRIPTION OF WORK,

Paragraph B, 21. -DELETE paragraph in its entirety. Item 3.13 Plumbing Specification 220000, Part 1.03 DESCRIPTION OF WORK,

Paragraph C, 18. -DELETE paragraph in its entirety. Item 3.14 Plumbing Specification 220000, Part 1.24 COMMISSIONING – DELETE section

in its entirety. Item 3.15 HVAC Specification 230000, Part 1.02 FILED SUB-BID REQUIREMENTS,

Paragraph B, 1 –


REVISE to read the following:

1. The Filed Sub-Bidder for the work of this SECTION 15500 shall

list, in Paragraph E, of the FORM FOR SUB-BID, the name of each

person, firm, or corporation, whom he proposes to use to perform the

following classes of work or part thereof, at the bid price therefore:

CLASS OF WORK PARAGRAPH

Insulation 2.04, 3.03

Ductwork 2.12, 2.13, 2.14, 2.15, 2.19, 3.11, 3.12, 3.13, 3.14,

3.18

Automatic Temperature 2.17, 3.16

Controls

Testing, Adjusting 3.20

& Balancing

Item 3.16 HVAC Specification 230000, Part 1.02 FILED SUB-BID REQUIREMENTS,

Paragraph C – REVISE to read the following:

C. Reference Drawings: The Work of this Filed Sub-Bid is shown on the

following Contract Drawings: M1.1, M1.2, M2.1, M2.2, M2.3, M3.1, MD1.1,

MD1.2. Item 3.17 HVAC Specification 230000, Part 1.03 WORK TO BE PERFORMED, Paragraph

C – REVISE to read the following:

C. Without limiting the generality thereof, the work to be

performed under this Section includes complete new HVAC systems with

the following major sub systems

1. Exhaust Fans

2. Ductwork with Insulation, Diffusers, Registers and Grilles

3. Variable refrigerant Flow (VRF) System

4. Pumps

5. Hydronic Specialties 6. Energy recovery Ventilators (ERV) 7. Electric Terminal Heating Units

8. Automatic temperature controls

9. Mechanical Identification

10. Mechanical Insulation

11. Metal Ductwork

12. Ductwork Accessories

13. Air Outlets & Inlets

14. Provide an integrated emergency power fuel system. The

specification requires the detailed system design, equipment, installation

inspection, startup, and training to be the responsibility of a single specialized fuel

system supplier. The specification section includes responsibility for mechanical,

electrical, and control systems. The system shall be in accordance with design

standards and shall be designed and built to N+1 redundancy against failure.

Shall include: Fuel storage tanks and accessories, Fuel distribution pipe, valves

and fittings, Fuel day tanks, Fuel transfer and control – duplex pump sets, Tank


level and leak monitoring system, Tank fill with spill containment, Fuel filtration

system, and Heating system.

15. Testing, Adjusting, Balancing, and Commissioning

16. Louvers

17. Gas Detection System

18. Duct-Mounted Filter Box

Item 3.18 HVAC Specification 230000, Part 1.04 RELATED WORK,

Paragraph B – REVISE to read the following:

B. For temporary controls, refer to 015000 and coordinate with General

Contractor and/or Construction Manager.


Paragraph C – REVISE to read the following:

C. For flashing of vents through roof and setting of roof curbs and flashing of

such, refer to SECTION 071000 – Waterproofing, Dampproofing & Caulking.


Paragraph E – REVISE to read the following:

E. For excavation and backfill of below grade mechanical and related

systems refer to Division 31.


Paragraph F – REVISE to read the following:

F. For firestopping not called for in this Section refer to SECTION 078400 –

FIRESTOPPING.


Paragraph G – REVISE to read the following:

G. For finished painting of mechanical systems not called for in this Section

refer to SECTION 099100 - PAINTING.


Paragraph H – REVISE to read the following:

H. For interior concrete work relating to this Section refer to

SECTION 033000 - CONCRETE.


Paragraph I – REVISE to read the following:

I. For exterior concrete work relating to this Section refer to

SECTION 033000 - CONCRETE.


Item 3.25 HVAC Specification 230000, Part 1.16 SUBMITTALS, Paragraph

C – REVISE to read the following:

C. Provide submittals for the following equipment:

1. Energy Recovery Ventilators

2. Hangers and Attachments

3. Mechanical Identification

4. Mechanical Insulation

5. Piping, Valves and Accessories

6. Terminal Heating Units

7. Power and Gravity Ventilators

8. VRF System

9. Breeching & Stacks

10. Fuel Oil System

11. Metal Ductwork 12. Ductwork Accessories 13. Air Outlets and Inlets

14. Automatic Temperature Controls

15. Testing, Adjusting, Balancing, and Commissioning

16. Louvers

17. Gas Detection System

18. Duct-mounted Filter Box

Item 3.26 HVAC Specification 230000, Part 1.27 COMMISSIONING,

Paragraph A – REVISE to read the following:

A. Contractor must coordinate construction and provide support to the

Owner’s Commissioning Agent.

Item 3.27 HVAC Specification 230000 – ADD the

following:

2.20 EXTRUDED ALUMINUM RAIN RESISTANT

WALL LOUVERS A. AIR Construction Requirements Louvers shall be model EHH-401 as manufactured by Greenheck, or an approved equal. Louver frame shall be 4 inch deep channel style with 0.081 inch extruded aluminum wall thickness. Louver blades shall be horizontal stationary style located on approximate 2 inch centers with 0.081 inch extruded aluminum wall thickness. Bird screen shall be internally mounted 0.75 inch x 0.051 inch flattened expanded aluminum. Finish of all materials shall be mill only. The Louvers shall be AMCA certified louvers

B. Performance Requirements

Louvers shall be AMCA Licensed when tested in accordance with

AMCA 500-L Air Performance and Water Penetration test procedures.

Free area for size 48 inch x 48 inch louver shall not be less than 6.72

square feet (42%). Airflow resistance at 1000 feet per minute free area

intake velocity shall not be greater than 0.19 inch water gauge pressure

drop. Airflow resistance at 1000 feet per minute free area exhaust

velocity shall not be greater than 0.2 inch water gauge pressure drop.

Beginning point of water penetration is above 1250 feet per minute free


area intake velocity.Louvers shall be designed and manufactured to

withstand a minimum 25 pound per square foot wind load.

C. Provide the following Manufacturer’s Options: 70% Kynar Paint (AAMA 2605) Clear Anodize (204-R1 Class II, or 215-R1

Class I) Clip angles

0.5 inch x 0.047 inch square stainless steel wire cloth

bird screen

D. Manufacturer: Subject to compliance with requirements, provide

louvers of one of the following:

Greenhec

k Ruskin Carnes

Or

equal

Item 3.28 HVAC Specification 230000 – ADD the

following:

2.21 DX HEATING/COOLING COIL(DC-1)

A. Design Pressures and Temperatures

1. Coils shall be designed to withstand 250 psi maximum

operating pressures and a maximum temperature of 300°F for

standard duty copper tube coils with standard headers. Higher limits

are available, depending on coil construction and / or materials used.

B. Factory Testing Requirements

1. Coils are to be pressurized and then completely submerged in

warm water containing special wetting and final cleaning agents for

leak testing and tested with a minimum of 315 psi air pressure for

standard copper tube coils. A hydrostatic leak test is available upon

request. Certified hydrostatic leak test and Certificate of Conformance also available upon request. Coils must display a tag with the inspector's identification as proof of testing. After testing coils are to receive a 5 lb. Nitrogen charge assuring the coil as received remains leak free and clear of internal contamination.

C. Fins

1. Coils shall be of plate fin type construction providing uniform

support for all coil tubes. Coils are to be manufactured with die-formed

aluminum, copper, cupro- nickel, stainless steel or carbon steel fins with

self-spacing collars, which completely cover the entire tube surface.

2. Fin corrugations available shall include: Flat, Rippled and “Hi-

F” Sine Wave for coils built with .625” OD tubes and utilizing a 1.5”

equilateral tube pattern; Flat, Rippled and “Hi-F” Sine Wave for coils

built with .50” OD tubes and utilizing a

1.25” equilateral tube pattern; “Hi-F” Sine Wave for coils built with .50”

OD tubes and utilizing a 1.5” equilateral tube pattern; Rippled and “Hi-F”


Sine Wave for coils built with .375” OD tubing and utilizing a 1.0”

equilateral tube pattern; “Hi-F” Sine Wave for coils built with .375” OD

tubes and utilizing a 1.25” equilateral tube pattern.

3. Standard fin thickness’ available shall include: .0060” +/- 5% for

aluminum and copper; .0075” +/- 5% for aluminum, copper, and cupro-

nickel, carbon steel and stainless steel; .0095” +/- 5% for aluminum,

copper, carbon steel and stainless steel; .016” +/- 5% for aluminum and

copper.

4. Fins are to be formed with full collar on all of available materials,

corrugation styles, tube diameters and tube patterns.

5. Fin spacing available shall include: 4-14 fins / inch on coils

supplied with .625” OD tubing; 6-14 fins / inch on coils supplied with .50”

OD tubing; 4-20 fins / inch on coils supplied with .375” OD tubing.

D. Tubing

1. Tubing and return bends shall be fabricated from UNS 12200

seamless copper conforming to ASTM B75 for standard pressure and

temperature applications. Elevated duty and special application

construction tube cores shall be available in seamless 90/10 Cupro-Nickel

Alloy #706, Stainless Steel ASTM #A249 grade 304L or 316L and Carbon

Steel ASTM #A214 welded or #A179 Seamless.

2. Core tubes (excluding hot dipped galvanized steel coils) shall

be mechanically expanded to form an interference fit within the fin collars. Expansion shall not decrease the tube wall thickness.

3. Coils shall be manufactured using return bends of the same material

as the core tubing. Return bend wall thickness, at the outside circumference

of the bend, shall be no less than the core tube wall thickness. The use of

“hairpin” style tubes & return bends shall be unacceptable.

Available tube size and wall thicknesses shall be as follows:

4. Coils shall be made available with copper tubes utilizing internally

enhanced Rifled Surfacing when required. As a quality control measure,

Coil Manufacturer shall be capable of providing copper rifled tubing,

enhanced within it’s own facility, and not supplied by an outside source.

5. As a further quality control measure, Coil Manufacturer shall be

capable of supplying all of above listed extruded seamless copper tube sizes and

wall thickness’from their own, in house, Copper Tube Mill. Tube Mill shall be

owned by the Coil Manufacturer and operated by trained personnel under the

employ and supervision of said Coil Manufacturer.

Material 0.375” O.D. 0.50” O.D. 0.625” O.D. 1.0” O.D.

Copper 0.013, 0.016, 0.020,

0.025, 0.030 0.016, 0.022,

0.030 0.020, 0.025, 0.035,

0.049 0.023, 0.035,

0.049 Cupro-Nickel 0.020, 0.035, 0.049 0.035, 0.049 Carbon Steel 0.035, 0.049, 0.065 0.035, 0.049

Stainless Steel 0.035, 0.049, 0.065 0.035, 0.049 Admiralty Brass 0.049


E. Headers

1. Headers shall be constructed from UNS 12200 seamless copper conforming

to ASTM B75 and B251 with an H55 temper for standard applications. Other option

for headers for high-pressure construction shall incorporate seamless 90/10 Cupro-

Nickel Alloy #706 conforming to ASTM B111, Carbon Steel conforming to ASTM

A53A or A135A, Stainless Steel conforming to ASTM A249, at Sch. 10 or Sch. 40,

per the application requirements.

2. Headers shall be manufactured using a Pierce and Flare die-punch method

when possible. This shall insure that the tube-to-header tube hole intrusions into

the header are such that the landed surface area contact length for joint brazing

approximates three times the core tube wall thickness. 3. Standard construction shall be such that the core tubes will penetrate directly into the header without the use of intermediate adapter tube spuds, except where curving or splaying of headers is required. Each of these core tubes shall extend evenly within the inside diameter of the header to a depth no greater than 0.12 inch. In addition, and without exception, each of these core tubes penetrating the hot gas header(s) shall pass through an oversized hole in the sheet metal casing, of no less than 25% larger than the outside diameter of the core tube. This will prevent metal to metal contact between the tube and the sheet metal casing, allowing the header and core tubes to “float” and eliminating the possibility of premature failure caused by excess vibration from the compressor side (hot gas) of the coil. 4. End caps shall be precision die-formed and positioned inside the header so

that the thickness of the brazed fillet joint approximates three times that of the

header wall thickness. Manufacturers using standard copper tube end caps, which

are brazed over the outside of the end of the headers shall be considered as

unacceptable.

F. Connections

1. Standard construction of copper tube condenser coils shall allow for

copper sweat connections for type L or K wall copper. Other materials shall be

made available dependant upon the materials of construction of the tube core.

G. Brazing & Welding

1. Oxyfuel gas brazing, using fillet rod material of minimum 5% silver shall

be used for all non-ferrous tube joints to headers and connections. Ferrous to non-

ferrous joints shall contain as much as 35% silver or may be Tobin bronze.

2. Gas shielded arc welding shall be used for all stainless steel joints and

also for nay ferrous tube joints made to compatible or alike material headers and

connections.

H. Casing

1. Coil casing and endplate shall be fabricated from Galvanized steel, as a

standard construction, meeting ASTM and UL G90U requirements, Aluminum,

0.080” thick, optional, Copper, 0.063 “ thick, optional,16- or 14-gauge carbon

steel or stainless steel, optional. double-flange casing shall be provided when coils

are specified as vertical stacking.


Standard coil intermediate tube sheets (center tube supports) shall be

fabricated from the same gauge sheet stock and material as the end plates, and

to the following schedule:

Finned Length (inches) Number of Tube Sheets 6.00 – 48.00 0 48.01 – 96.00 1 96.01 – 144.00 2

144.01 and greater 4

I. Certifications

1. Coil manufacturer shall be certified and registered with the Air

Conditioning and Refrigeration Institute (ARI) and shall be an active

and current member of the ARI Standard 410 Air-Cooling and Air-

Heating Coils certification program and shall have original coil line

certifications and computerized selections dating back a minimum of

30 years, as proof of overall company performance, stability and

longevity.

J. Agency Approval

1. Coil manufacturer shall be registered by UL to ISO 9000

(ANSI/ASQC Q92). Applicable commercial coil models shall be UL

Standard 207 and registered as Refrigerant Containing Components and

Accessories; non- electrical. CRN (Canadian Registration Numbers) shall

be provided for all coils shipping into Canada as requested.

2. Coil manufacturer shall also possess ASME Section VIII

Division 1, U and UM stamping certification as proof of acceptable

quality control methods. Manufacturers unable to meet the above listed

agency approvals shall be considered as unacceptable.

K. Lead Time and Shipping

1. Standard lead-time for custom made retrofit condenser coils of

standard construction with OEM circuiting shall be 11- 15 working days,

with reduced lead-time emergency shipment options of 10 working days

and 5 working days from order placement date and based upon

production approval.

2. Standard lead-time for custom made condenser coils of

manufacturer’s own standard design and circuiting shall be 10 working

days, with reduced lead-time emergency shipment options for 5 working

days, 48-hours and 24-hours from order placement date.

3. All coils shall be quoted and offered as FOB Factory, Full

Freight Allowed to any and all destinations within the Continental

United States.

L. Manufacturer: Subject to compliance with requirements, provide DX

Coil of one of the following:

1. Luvata

2. Daikin applied

3. Trane Co. 4. Or equal


Item 3.29 HVAC Specification 230000 – ADD the following:

2.22 LEV CONTROL BOX & VALVE ASSEMBLY (LEV-1)

A. General:

1. The LEV control box & valve assembly shall be a refrigerant

metering kit that mounts to a third party coil, and shall have a

modulating linear expansion device. The LEV kit shall be used with a

Variable Refrigerant Flow System. The LEV kit shall support

individual control using DDC controllers.

B. LEV Kit:

1. The unit shall be run tested. Provided with the unit shall be

all factory wiring, piping, electronic modulating linear expansion

device, control circuit board and control panel. The unit shall have a

self-diagnostic function, 3-minute time delay mechanism, and an auto

restart function. Refrigerant pipes shall be charged with dehydrated

air before shipment from the factory. 2. The LEV motor shall be a 12VDC Stepping Motor Drive (0-~1400 pulse) 3. The unit shall be provided with thermistors for detection of

suction air temperature, discharge temperature, liquid pipe

temperature, and gas pipe temperature.

4. The LEV kit shall be ETL Certified to UL 6073-1 and UL 60730-

2-0

C. Electrical

1. The unit shall be 208/230VAC, 60Hz, 1-phase.

D. Controls:

1. This unit shall use controls provided by the VRF system

manufacturer to perform functions necessary to operate the system.

2. The unit shall require a third party flow proving switch, to be

provided by the ATC contractor.

3. The unit shall be equipped for 3 speed fan control with signal

relays, Error Input/Output signal, Heating, Cooling, and Defrost

Signal, and shall be capable of set point control via CMCN Remote Controller or 0-10VDC Input.

4. Control board shall include contacts for control of external heat

source. External heat may be energized as second stage with 1.8°F –

9.0°F adjustable dead band from set point.

E. Manufacturer: Subject to compliance with requirements, provided valve

control box of one of the following: 1. Mitsubishi 2. Hitachi

3. Toshiba

4. Or equal


Item 3.30 HVAC Specification 230000 – ADD the following: 2.23 DUCT-MOUNTED FILTER BOX

A. Scope 1. This specification details the requirements for side access filter housings designed to accommodate 4” MERV-13 Prefilters.

B. Construction

1. Side access filter housings shall be constructed from minimum 16 GA

galvanized steel. Panels and posts shall be permanently fastened to maintain

tolerances. No holes shall be drilled or punched to assure a leak free field

installation. All metal to metal joints shall be sealed with caulk.

2. Unit shall consist of upstream and downstream 1-5/16” outwardly turned flanges for installation in duct work or in-line with an air handling unit. Housing

shall have a depth in the direction of airflow of 8-1/2”.

3. Housing design must be such that filter installation is done without any

additional clips or holding frames.

4. The filter track system shall be extruded aluminum with integral downstream

gasket.

The track shall be designed to accept 4” deep MERV-13 prefilters.

5. Doors shall be 16 GA galvanized steel and mounted on both sides of the

housing for ease in filter installation and replacement. Hinges and positive pressure

trip latches shall be permanently mounted. Perimeter door gasket shall be oil and

moisture shall be permanently mounted. Perimeter door gasket shall be oil and

moisture resistant high density PVC foam.

C. Performance

1. Leakage upstream to downstream shall be less than 0.5% at 125% of

rated air flow and verified by an independent test lab. D. Attic Stock

1. HVAC contractor shall provide six (6) spare 4” MERV-13 Filters to owner

for Attic Stock. E. Manufacturer: Subject to compliance with requirements, provide filter cabinet of one of the following:

1. Filtration Group 2. Fantech

3. Honeywell

4. Or equal

Item 3.31 HVAC Specification 230000 – ADD the following:

2.24 CO/NO2 DETECTION AND CONTROL

A. Control Panel 1. The control panel shall provide continuous monitoring of the designated gas levels in the assigned area and control the ventilation system via digital outputs in accordance with all applicable codes and standards. 2. The control panel shall have the ability to interface via analog or

digital outputs to any compatible electronic analog control, DDC/PLC


control or automation system. Provide an upward communication BACnet

protocol for BMS interface.

3. The control panel shall have the capability to accept any combination of

4-20 mAtransmitters provided by the controller manufacturer.

4. The control panel shall accept up to 16 analog inputs with four (4) digital

inputs.Each analog input can have five (5) trip/set-points.

5. There shall be five (5) relay outputs for every four (4) analog inputs

and two (2) independent 4-20 mA outputs available. The outputs shall be

programmable in the field. Each of the sensing points is readily addressable

to either of the (2) analog outputs by selecting the Minimum, Maximum, or

Average value.

6. The alarm shall be acknowledged by an external manual reset switch

via the digital input or through the control panel menu.

7. The control panel shall have status indicator LED’s located on the

front; Red = Fail, Yellow = Alarm.

8. The control panel shall include a two line, backlit LCD display of 16

characters, at 1 digit resolution.

9. The controller shall be NRTL performance tested and certified to

ANSI/UL 2017.

10. The contractor shall supply the PolyGard® Series MGC2-16 analog

controller, by INTEC Controls (a Relevant Solutions brand); or approved equal.

B. Carbon Monoxide (CO) Sensor/Transmitter

1. The carbon monoxide sensor/transmitter shall provide monitoring

of the carbon monoxide levels in the parking garage and control the

ventilation system via the control panel in accordance with all applicable

codes and standards.

2. The sensors shall be electrochemical type. The sensor/transmitter shall

have plug-in technology for ease of troubleshooting and replacement of both

the element and the printed circuit board. Solid-state sensing devices shall not

be acceptable. 3. The sensor range shall be 0-250 ppm carbon monoxide. A microprocessor-based transmitter shall generate a proportional 4-20 mA output signal. The wiring between the transmitter and the control panel shall be a 2-wire, twisted and shielded, 4-20mA,17-28 VDC configuration. Each sensor/transmitter shall cover between 5,000 and 10,000 square feet of the garage floor and placement shall be applied strategically and appropriately per floor plan requirement. 4. The sensor shall have stability and resolution of ± 3 PPM of reading,

repeatability of± 3% of reading, and a response time of 50 seconds to a 90%

step change. The long- term output drift shall not exceed more than 0.4% of

signal loss per month. The permissible ambient working temperature shall be

14°F to 122°F (-10°C to 50°C) and permissible ambient humidity shall be 15

to 95% RH, non-condensing. The sensor shall require no routine maintenance

other than periodic calibration. Its life expectancy shall be 5 years of normal

service. The manufacturer shall provide a two 2-year warranty for materials

and workmanship, and a 12-month warranty on the sensing element under

normal exposure.

5. The sensor/transmitter printed circuit board shall have the capability of

adding up to


(2) alarm relays with individual setpoints for local control or status indication.

6. The sensor/transmitter shall be contained in a NEMA 4X metal

enclosure. The enclosure for the sensor/transmitter shall be installed on walls

or columns approximately 5 feet above the floor.

7. The output signal from the sensor/transmitter shall be a direct input to the control panel. All sequences of fan and alarm control, including time delay

functions to prevent hunting of ventilation fans shall be a part of the control panel.

8. If the level of Carbon Monoxide reaches 25 PPM in the area of detection,

the low alarm shall activate and the exhaust fans will be started. If the level of CO

increases to 100 PPM, the high alarm shall activate.

9. The sensor/transmitter shall be NRTL performance tested and certified to

ANSI/UL

2075.

10. The contractor shall supply the PolyGard® Series LC-1112 CO

sensor/transmitter, by INTEC Controls (a Relevant Solutions brand); or an

approved equal.

C. Nitrogen Dioxide (NO2) Sensor/Transmitter:

1. The Nitrogen Dioxide sensor/transmitter shall provide monitoring of the

Nitrogen Dioxide levels present in diesel exhaust in the parking garage and

control the ventilation system via the Control panel in accordance with all

applicable codes and standards.

2. The sensors shall be electrochemical type. The sensor/transmitter shall

have plug-in technology for ease of troubleshooting and replacement of both the

sensing element and the printed circuit board. Solid-state sensing devices shall

not be acceptable.

3. The sensor range shall be 0-10 ppm Nitrogen Dioxide. A micro-

processor-based transmitter shall generate a polarity protected, proportional 4-20

mA output signal. The wiring between the transmitter and the Control panel shall

be a 2-wire, twisted and shielded, 4-20mA, 17-28 VDC configuration. Each

sensor/transmitter shall

cover between 4,000 and 6,000 square feet of the garage floor and placement shall

be applied strategically and appropriately per floor plan requirement.

4. The sensor shall have an accuracy and resolution of ±0.1 PPM of

reading, repeatability of ±2% of reading, and a response time of less than 40

seconds to a

90% step change. The sensor drift shall not exceed more than 2% signal loss per

month. The permissible ambient working temperature shall be 14°F to 104°F (-

20°C to 40°C) and the permissible ambient humidity shall be 15 to 95% RH, non-

condensing. The sensor shall require no routine maintenance other than periodic

calibration. Its life expectancy shall be 2 years of normal service. The

manufacturer shall provide a two 2-year warranty for materials and workmanship,

and a 12-month warranty on the sensing element under normal exposure. 5. The sensor/transmitter shall be contained in a NEMA 4X enclosure. The enclosure with the sensor/transmitter shall be installed on walls or columns approximately 1.5 ft. above the floor. 6. The sensor/transmitter shall have the capability of adding up to (2) relays as a separate component to the printed circuit board of the sensor.


7. The output signal from the sensor/transmitter shall be a direct

input into the digital control building automation system. All

sequences of fan and alarm control, including time delay functions to

prevent hunting of ventilation fans shall be a part of the Control panel. 8. If the level of NO2 reaches 2 PPM, the low alarm shall activate. If the level of NO2 increases to 5 PPM, the high alarm shall activate. 9. The contractor shall supply the PolyGard® Series AT-1130 NO2 sensor/transmitter, by INTEC Controls (a Relevant Solutions brand); or an approved equal.

D. Supplier:

1. The contractor shall supply all gas monitoring and control system

by one manufacturer. The MGC-Series control panel, all associated gas

transmitters and the SPC controller and associated gas transmitters are

the basis of design by INTEC Controls (a Relevant Solutions brand), or

approved equal.

E. Warranty:

1. The manufacturer shall provide a two 2-year warranty for

materials and workmanship, and a 12-month warranty on the

sensing element under normal exposure.

F. System:

1. The MGC2-16 shall monitor the following:

a. Heated Parking 131: [5x] Carbon Monoxide and [5x]

Nitrogen Dioxide sensors/transmitters

b. Maintenance Bay 132: [1x] Carbon Monoxide and [1x]

Nitrogen Dioxide sensors/transmitter.

c. Wash Bay 133: [1x] Carbon Monoxide and [1x]

Nitrogen Dioxide sensors/transmitter.

G. Manufacturer: Subject to compliance with requirements, provide gas

detection system of one of the following:

1. Intec

2. Honeywell

3. Automation Components Inc.

4. Or equal

Item 3.32 HVAC Specification 230000 – Part 3.19 INSTALLATION OF

GENERATOR HEAT EXCHANGER AND AIR COOLER - REPLACE with the following:

3.19 INSTALLATION OF EXTRUDED ALUMINUM RAIN RESISTANT WALL

LOUVERS

A. HVAC Contractor is responsible for installation of Louvers in

accordance with the following:

1. EXAMINATION


a. Inspect areas to receive louvers. Notify the Architect of

conditions that would adversely affect the installation or

subsequent utilization of the louvers. Do not proceed with

installation until unsatisfactory conditions are corrected.

b. Notify Architect of unsatisfactory preparation before

proceeding.

2. PREPARATION

a. Clean opening thoroughly prior to installation.

b. Prepare surfaces using the methods recommended by

the manufacturer for achieving the best result for the substrate

under the project conditions.

3. INSTALLATION

a. Installation of all Louvers must be supervised by the G.C.

b. Install louvers at locations indicated on the drawings and

in accordance with manufacturer's instructions.

c. Install louvers plumb, level, in plane of wall, and in

alignment with adjacent work.

d. Install joint sealants as specified in Section 079200.

4. CLEANING a. Clean louver surfaces in accordance with manufacturer's instructions. b. Touch-up, repair or replace damaged products before Substantial Completion.

Item 3.33 HVAC Specification 230000 – ADD the following and re-number accordingly:

3.20 INSTALLATION OF DX HEATING/COOLING COIL

B. Vibration Control and Seismic Restraint: Refer to SECTION 230548

and drawing VS.1 for the appropriate support of each piece of HVAC

equipment noted as requiring such. The vibration control and seismic restraint

manufacturer shall recommend the correct

connection and device as outlined in SECTION 230548 and drawing VS.1.

C. General:

1. Verify all dimensions by field measurements. Verify roof

structure, mounting supports, wall structure, and membrane

installations are completed to the proper point to allow installation of

wall mounted and roof mounted units. Examine rough- in for refrigerant piping systems to verify actual locations of piping connections prior to installation. Do not proceed until unsatisfactory conditions have been

corrected.

2. Install equipment in accordance with manufacturer’s installation

instructions. Install units plumb and level, firmly anchored in locations

indicated, and maintain manufacturer's recommended clearances.

D. Field Quality Control:

1. Provide the services, to include a written report, of a factory

authorized service representative to examine the field assembly of the components, installation, and piping and electrical connections.

2. Charge systems with refrigerant and oil, and test for leaks.

Repair leaks and replace lost refrigerant and oil.


E. Demonstration:

1. Provide the services of a factory authorized service

representative to provide start-up service and to demonstrate and train

the Owner's maintenance personnel as specified below. 2. Start-up service: Place units into operation and adjust controls

and safeties. Replace damaged or malfunctioning components and controls.

F. Training:

1. Train the Owner's maintenance personnel on start-up and shut-

down procedures, troubleshooting procedures, and servicing and

preventative maintenance schedules and procedures.

2. Schedule training with Owner through the Architect/Engineer

with at least 7 days prior notice.


3.21 INSTALLATION OF LEV CONTROL BOX & VALVE ASSEMBLY

G. Vibration Control and Seismic Restraint: Refer to SECTION 230548 and

drawing VS.1 for the appropriate support of each piece of HVAC equipment noted as requiring such. The vibration control and seismic restraint manufacturer

shall recommend the correct connection and device as outlined in SECTION 230548 and drawing VS.1.

H. General:

1. Verify all dimensions by field measurements. Verify roof

structure, mounting supports, wall structure, and membrane

installations are completed to the proper point to allow installation of

wall mounted and roof mounted units. Examine rough-in for

refrigerant piping systems to verify actual locations of piping

connections prior to installation. Do not proceed until unsatisfactory

conditions have been corrected.

2. Install equipment in accordance with manufacturer’s installation

instructions. Install units plumb and level, firmly anchored in locations

indicated, and maintain manufacturer's recommended clearances.

I. Field Quality Control:

1. Provide the services, to include a written report, of a factory

authorized service representative to examine the field assembly of the

components, installation, and piping and electrical connections.

2. Charge systems with refrigerant and oil, and test for leaks.

Repair leaks and replace lost refrigerant and oil.

J. Demonstration:

1. Provide the services of a factory authorized service representative

to provide start-up service and to demonstrate and train the Owner's

maintenance personnel as specified below. 2. Start-up service: Place units into operation and adjust controls and safeties. Replace damaged or malfunctioning components and controls.

K. Training:

1. Train the Owner's maintenance personnel on start-up and shut-

down procedures, troubleshooting procedures, and servicing and


preventative maintenance schedules and procedures. 2. Schedule training with Owner through the Architect/Engineer with at least 7 days prior notice. 3. Charge systems with refrigerant and oil, and test for leaks. Repair leaks and replace lost refrigerant and oil.


3.22 INSTALLATION OF DUCT MOUNTED FILTER BOX

L. Install per Manufacturer’s recommendations.

M. HVAC Contractor shall provide all duct transitions and connections required for a complete operable system.


3.23 INSTALLATION OF LEV CONTROL BOX & VALVE

ASSEMBLY

N. Inspection:

A. General: Examine areas and conditions under which gas monitoring and

control system shall be installed. Related items shall be examined as well.

O. Control Sequence:

1. The controller shall operate according to the specifications

recommended by the manufacturer. The operation shall be as

follows:

a. The controller shall be calibrated to the desired set-points before

operation.

b. The controller shall continuously detect the surrounding air for

any traces of the gas detected.

c. When the first set-point is reached, the sensor shall activate

the low alarm on the controller and the corresponding devices, such as

the exhaust fans, dampers, etc. d. If the gas level continues to increase to the second set-point, the high alarm shall activate with the corresponding devices, such as the audio/visual alarm, etc. e. The sensor shall continue to trace the specified gas and will not

disable the alarm until the gas level is dropped a significant percentage

below the alarm set-points.

P. Training:

1. A minimum of three hours of on-site product training is recommended.

Q. Operation and Maintenance Manuals:

1. The operation and maintenance manuals shall contain all

information necessary for the operation, maintenance, replacement,

installation, and parts procurement for the entire gas detection system.

This documentation shall include specific part numbers.

R.

Calibration:


1. Calibration shall not be necessary to verify system operation.

The user shall verify signal transmission from the sensor to the control

panel by applying the appropriate test gas to the corresponding sensor.

The calibration kit can be used for system verification or sensor

calibration when required. One calibration kit per gas to be monitored

shall be provided by the installing contractor and turned over as part of

their close out documentation to the building owner. Item 3.37 HVAC Specification 230000, Part 3.24 TESTING, ADJUSTING & BALANCING,

Paragraph A.2

– ADD the following:

f. Hydronic Geothermal Condenser Water System Item 3.38 HVAC Specification 230000, Part 3.24 TESTING, ADJUSTING & BALANCING,

Paragraph B.1 – ADD the following:

d. Hydronic Geothermal Condenser Water System Item 3.39 HVAC Specification 230000, Part 3.24 TESTING, ADJUSTING & BALANCING,

Paragraph D –

ADD the following:

3. Hydronic Systems

a. Open valves to full open position. Close coil bypass valves.

b. Remove and clean all strainers.

c. Examine hydronic systems and determine if water has been treated and

cleaned.

d. Check pump rotation.

e. Check expansion tanks to verify noted air pressure and that the system is

completely full of water.

f. Check air vents at high points of system and determine if all are installed

and operating freely.

g. Set temperature controls so all coils are calling for full

flow.

h. Check operation of automatic bypass valves. i. Check and set operating temperatures of boilers, and heat exchangers to design requirements. j. Verify lubrication of all motors and bearings.

Item 3.40 HVAC Specification 230000, Part 3.24 TESTING, ADJUSTING &

BALANCING, Paragraph E.2

– ADD the following:

c. Any re-balancing required to meet the desired CFM or modified

CFM due to system modifications or owner changes shall be provided at no

additional costs to the project/owner.


The following are changes to the Drawings

ARCHITECTURAL: Item 3.41 Sheet D1.1 – REVISE the note indicated in the attached SKA-03.River Street Fire House Renovation

Item 3.42 Sheet A2.1 – ADD the floor mats indicated in the attached SKA-02. Item 3.43 Sheet A2.2 – ADD the floor mats indicated in the attached SKA-02. Item 3.44 Sheet A6.2 – DELETE drawing 6 “Room 201 – Fire Pole” in its entirety and

REPLACE with the attached SKA-01. Item 3.45 Sheet A8.1 – DELETE drawing 2 “Storefront Types” in its entirety and REFER to the attached SKA-01 for storefront elevations and details. Item 3.46 Sheet A8.1 – REVISE the Door Schedule as indicated in the attached SKA-04. Item 3.47 Sheet A8.1 – REVISE the Door Types and Glass Schedule as indicated in the

attached SKA-05.

STURCTURAL: Item 3.48 Sheet S1.2 – REVISE drawings 7 and 8 as indicated in the attached SK-3.

Item 3.49 Sheet S2.1 – ADD the “First Floor Framing Part Plan” as indicated in the attached SK-2.

Item 3.50 Sheet S2.1 – REVISE “Second Floor Framing Plan” as indicated in the attached SK-1.

FIRE PROTECTION Item 3.51 Sheet FP2.0 BASEMENT AND FIRST FLOOR – FIRE PROTECTION – REVISE drawings as

depicted on Fire Protection sketches AD3-SKFP-1 and AD3-SKFP-2.

Item 3.52 Sheet FP2.1 SECOND FLOOR AND ATTIC – FIRE PROTECTION – REVISE drawings as

depicted on Fire Protection sketches AD3-SKFP-2.

PLUMBING Item 3.53 Sheet P0.2 RISER DIAGRAMS-PLUMBING – REVISE riser diagrams as depicted on Plumbing

sketches AD3-SKP-1, AD3-SKP-2 and AD3-SKP-3.

MECHANICAL Item 3.54 Sheet M1.2 – NEW WORK PLAN – SECOND FLOOR & ATTIC – HVAC – REVISE as indicated on

drawing AD3-M1

Item 3.55 Sheet M3.1 – CONTROLS I - REVISE as indicated on drawing AD3-M2


ELECTRICAL Item 3.56 None.

ATTACHMENTS • Cambridge Responsible Employer Plan Subcontractor’s Certificate (City of Cambridge

form for Projects over $100,000 only, where filed sub-bid is over $25,000)

• Section 084213 - Aluminum-Framed Storefront & Entrances Requirements (12 pages)

• Section 088000 – Glass and Glazing (8 pages)

• Section 124816 - Entrance Floor Grilles (2 pages)

• SKA-01 - ALUMINUM-FRAMED STOREFRONT FIRE POLE ENCLOSURE SYSTEM

• SKA-02 - SURFACE-PLACED FLOOR MAT LOCATIONS

• SKA-03 - DEMOLITION SCOPE OF SUPPORT SYSTEM AT FIRE POLE

• SKA-04 - REVISED UL LABEL AT DOOR SCHEDULE

• SKA-05 - DOOR TYPES AND GLAZING DIMENSIONS

• SK-1 - SECOND FLOOR FRAMING PLAN / REF. S2.1

• SK-2 - FIRST FLOOR FRAMING PART PLAN & ATTIC FRAMING PLAN / REF. S2.1

• SK-3 - SECTIONS 7 & 8 / REF. S1.2

• AD-3-SKFP-1 - PARTIAL BASEMENT PLANS – FIRE PROTECTION

• AD-3-SKFP-2 - PARTIAL FLOOR PLANS - FIRE PROTECTION

• AD-3-SKP-1 - DOMESTIC WATER RISER DIAGRAMS - PLUMBING

• AD-3-SKP-2 - SANITARY WASTE & VENT RISER DIAGRAMS – PLUMBING

• AD-3-SKP-3 - SANITARY WASTE & VENT RISER DIAGRAMS - PLUMBING

• AD3-M1 – ADD CONDENSATE DRAIN TO ERV-2

• AD3-M2 – REMOVE EXHAUST FAN CONTROL TYPE IV

Attachments Hereafter

All other details remain the same. Elizabeth Unger Purchasing Agent

Addendum No. 3

00316-2

CAMBRIDGE RESPONSIBLE EMPLOYER PLAN FILED SUB-CONTRACTOR'S CERTIFICATION - BID FORM

______________________________________ hereby certifies that it shall: (Name of Sub-Contractor) (1) comply with the Cambridge Employment Plan as it currently exists and as it may be, from time to time, amended, and specifically shall comply with the worker hours requirements of §2.66.060(A); (2) comply with the obligations established under M.G.L. c.149 and G.L. c30§39M to pay the appropriate lawful prevailing wage rates to its employees; (3) maintain or participate in a bona fide apprentice training program as defined by c.23 §§ 11H and 11I for each apprenticeable trade or occupation represented in its workforce that is approved by the Division of Apprentice Training of the Department of Labor and Industries and shall abide by the apprentice to journeymen ratio for each trade prescribed therein in the performance of the contract; (4) furnish, at its expense, hospitalization and medical benefits for all its employees employed on the project and/or coverage at least comparable in value to the hospitalization and medical benefits provided by the health and welfare plans in the applicable craft recognized by M.G.L. c.149, §26 and G.L. c30§39M in establishing minimum wage rates; (5) maintain appropriate industrial accident insurance coverage for all its employees employed on the project in accordance with M.G.L. c.152; (6) properly classify employees as employees rather than independent contractors and treat them accordingly for purposes of workers' compensation insurance, unemployment taxes, social security taxes and income tax withholding; and (7) certify under oath and in writing on a weekly basis for the entire duration of its work on the project, that it is in compliance with the above obligations. Signed under the penalties of perjury. ____________(date) __________________________________________________ Signature of authorized representative of contractor __________________________________________________ Print name of authorized representative of contractor THIS CERTIFICATE APPLIES ONLY TO FILED SUBBIDS $25,000 AND OVER – INCLUDING ALL ALTERNATES, IF ANY.

RETURN THIS FORM WITH YOUR BID

RIVER STREET FIRE HOUSE RENOVATION Cambridge, Massachusetts

ALUMINUM-FRAMED STOREFRONT AND ENTRANCES Section 084213 - 1 ADDENDA NO. 3

SECTION 084213

ALUMINUM-FRAMED STOREFRONT & ENTRANCES

PART 1 - GENERAL

1.01 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.02 SUMMARY

A. Section Includes:

1. Interior glazed storefront framing. 2. Interior glazed, manual-swing doors and door-frame units. 3. Field applied decorative self-adhesive film associated with glazing in the storefront

system, as well as in other selected areas, in quantities and locations as indicated in this SECTION 084213 and as on the Drawings.

B. Related Requirements:

1. Section 087100, Door hardware, for door hardware. 2. Section 088000, Glass and Glazing, for glass and glazing for wood and hollow metal

doors and sidelights.

1.03 ACTION SUBMITTALS

A. Product Data: For each type of product.

1. Include construction details, material descriptions, dimensions of individual components and profiles, and finishes.

B. Shop Drawings: For aluminum-framed entrances and storefronts. Include plans, elevations, sections, full-size details, and attachments to other work.

1. Include details of provisions for assembly expansion and contraction and for draining moisture occurring within the assembly to the exterior.

2. Include full-size isometric details of each vertical-to-horizontal intersection of aluminum-framed entrances and storefronts, showing the following:

a. Joinery, including concealed welds. b. Anchorage. c. Expansion provisions. d. Glazing.



e. Flashing and drainage.

C. Samples for Initial Selection: For units with factory-applied color finishes.

D. Samples for Verification: For each type of exposed finish required, in manufacturer's standard sizes.

1.04 INFORMATIONAL SUBMITTALS

A. Preconstruction Laboratory Mockup Testing Submittals:

1. Testing Program: Developed specifically for Project. 2. Test Reports: Prepared by a qualified preconstruction testing agency for each mockup

test. 3. Record Drawings: As-built drawings of preconstruction laboratory mockups showing

changes made during preconstruction laboratory mockup testing.

B. Qualification Data: For Installer.

C. Energy Performance Certificates: For aluminum-framed entrances and storefronts, accessories, and components, from manufacturer.

1. Basis for Certification: NFRC-certified energy performance values for each aluminum-framed entrance and storefront.

D. Product Test Reports: For aluminum-framed entrances and storefronts, for tests performed by manufacturer and witnessed by a qualified testing agency.

E. Field quality-control reports.

F. Sample Warranties: For special warranties.

1.05 CLOSEOUT SUBMITTALS

A. Maintenance Data: For aluminum-framed entrances and storefronts to include in maintenance manuals.

B. Maintenance Data for Structural Sealant: For structural-sealant-glazed storefront to include in maintenance manuals. Include ASTM C 1401 recommendations for post-installation-phase quality-control program.

1.06 QUALITY ASSURANCE

A. Installer Qualifications: An entity that employs installers and supervisors who are trained and approved by manufacturer.

B. Product Options: Information on Drawings and in Specifications establishes requirements for aesthetic effects and performance characteristics of assemblies. Aesthetic effects are indicated



by dimensions, arrangements, alignment, and profiles of components and assemblies as they relate to sightlines, to one another, and to adjoining construction.

1. Do not change intended aesthetic effects, as judged solely by Architect, except with Architect's approval. If changes are proposed, submit comprehensive explanatory data to Architect for review.

1.07 MOCKUPS

A. Mockups: Build mockups to verify selections made under Sample submittals and to demonstrate aesthetic effects and set quality standards for fabrication and installation.

1. Build mockup of typical wall area as shown on Drawings.

2. Approval of mockups does not constitute approval of deviations from the Contract Documents contained in mockups unless Architect specifically approves such deviations in writing.

3. Subject to compliance with requirements, approved mockups may become part of the completed Work if undisturbed at time of Substantial Completion.

1.08 WARRANTY

A. Special Warranty: Manufacturer agrees to repair or replace components of aluminum-framed entrances and storefronts that do not comply with requirements or that fail in materials or workmanship within specified warranty period.

1. Failures include, but are not limited to, the following:

a. Structural failures including, but not limited to, excessive deflection. b. Noise or vibration created by wind and thermal and structural movements. c. Deterioration of metals and other materials beyond normal weathering. d. Failure of operating components.

2. Warranty Period: 10 years from date of Substantial Completion.

B. Special Finish Warranty: Standard form in which manufacturer agrees to repair finishes or replace aluminum that shows evidence of deterioration of factory-applied finishes within specified warranty period.

1. Deterioration includes, but is not limited to, the following:

a. Color fading more than 5 Hunter units when tested according to ASTM D 2244. b. Chalking in excess of a No. 8 rating when tested according to ASTM D 4214. c. Cracking, checking, peeling, or failure of paint to adhere to bare metal.

2. Warranty Period: 20 years from date of Substantial Completion.



PART 2 - PRODUCTS

2.01 PERFORMANCE REQUIREMENTS

A. General Performance: Comply with performance requirements specified, as determined by testing of aluminum-framed entrances and storefronts representing those indicated for this Project without failure due to defective manufacture, fabrication, installation, or other defects in construction.

1. Aluminum-framed entrances and storefronts shall withstand movements of supporting structure including, but not limited to, story drift, twist, column shortening, long-term creep, and deflection from uniformly distributed and concentrated live loads.

2. Failure also includes the following:

a. Thermal stresses transferring to building structure. b. Glass breakage. c. Noise or vibration created by wind and thermal and structural movements. d. Loosening or weakening of fasteners, attachments, and other components. e. Failure of operating units.

B. Deflection of Framing Members: At design wind pressure, as follows:

1. Deflection Normal to Wall Plane: Limited to 1/175 of clear span for spans up to 13 feet 6 inches and to 1/240 of clear span plus 1/4 inch for spans greater than 13 feet 6 inches or an amount that restricts edge deflection of individual glazing lites to 3/4 inch, whichever is less.

2. Deflection Parallel to Glazing Plane: Limited to amount not exceeding that which reduces glazing bite to less than 75 percent of design dimension and that which reduces edge clearance between framing members and glazing or other fixed components to less than 1/8 inch.

C. Structural: Test according to ASTM E 330 as follows:

1. When tested at positive and negative wind-load design pressures, assemblies do not evidence deflection exceeding specified limits.

2. When tested at 150 percent of positive and negative wind-load design pressures, assemblies, including anchorage, do not evidence material failures, structural distress, or permanent deformation of main framing members exceeding 0.2 percent of span.

3. Test Durations: As required by design wind velocity, but not less than 10 seconds.

D. Noise Reduction: Test according to ASTM E 90, with ratings determined by ASTM E 1332, as follows.

1. Outdoor-Indoor Transmission Class: Minimum 30.

E. Thermal Movements: Allow for thermal movements resulting from ambient and surface temperature changes:



1. Temperature Change: 120 deg F (67 deg C), ambient; 180 deg F (100 deg C), material surfaces.

2.02 MANUFACTURERS

A. Basis-of-Design Product: Subject to compliance with requirements, provide System 403T, thermal storefront and entrances, as manufactured by EFCO Corporation, or comparable product by one of the following:

1. Arch Aluminum & Glass Co., Inc. 2. Kawneer North America.

B. Source Limitations: Obtain all components of aluminum-framed entrance and storefront system, including framing and accessories, from single manufacturer.

2.03 FRAMING

A. Framing Members: Manufacturer's extruded- or formed-aluminum framing members of thickness required and reinforced as required to support imposed loads.

1. Construction: Nonthermal. 2. Glazing System: Retained mechanically with gaskets on four sides. 3. Glazing Plane: Center. 4. Finish: High-performance organic finish. 5. Fabrication Method: Field-fabricated stick system.

B. Backer Plates: Manufacturer's standard, continuous backer plates for framing members, if not integral, where framing abuts adjacent construction.

C. Brackets and Reinforcements: Manufacturer's standard high-strength aluminum with nonstaining, nonferrous shims for aligning system components.

D. Materials:

1. Aluminum: Alloy and temper recommended by manufacturer for type of use and finish indicated.

a. Sheet and Plate: ASTM B 209. b. Extruded Bars, Rods, Profiles, and Tubes: ASTM B 221. c. Extruded Structural Pipe and Tubes: ASTM B 429/B 429M. d. Structural Profiles: ASTM B 308/B 308M.

2.04 ENTRANCE DOOR SYSTEMS

A. Entrance Doors: Manufacturer's standard glazed entrance doors for manual-swing operation.

1. Door Construction: 2-inch overall thickness, with minimum 0.188-inch-thick, extruded-aluminum tubular rail and stile members. Mechanically fasten corners with reinforcing



brackets that are deeply penetrated and fillet welded or that incorporate concealed tie rods.

2. Door Design: Wide stile; 5-inch nominal width. 3. Glazing Stops and Gaskets: Beveled, snap-on, extruded-aluminum stops and preformed

gaskets.

2.05 ENTRANCE DOOR HARDWARE

A. Weather Stripping: Manufacturer's standard replaceable components.

1. Compression Type: Made of ASTM D 2000, molded neoprene, or ASTM D 2287, molded PVC.

2. Sliding Type: AAMA 701/702, made of wool, polypropylene, or nylon woven pile with nylon-fabric or aluminum-strip backing.

B. Weather Sweeps: Manufacturer's standard exterior-door bottom sweep with concealed fasteners on mounting strip.

C. Balance of entrance door hardware by Section 087100, Door hardware. Provide cutouts and reinforcing in doors and frames for hardware, devices and wiring.

2.06 GLAZING

A. Insulating-Glass Units: Factory-assembled units consisting of sealed lites of glass separated by a dehydrated interspace, qualified according to ASTM E 2190, consisting of two layers of 1/4-inch tempered glass and an air space, totaling 1-inch.

1. Sealing System: Dual seal, with manufacturer's standard primary and secondary sealants. 2. Spacer: Aluminum with mill or clear anodic finish. 3. Desiccant: Molecular sieve or silica gel, or a blend of both.

B. Glazing: Fully Tempered Clear Float Glass: ASTM C 1048, Kind FT (fully tempered), Condition A (uncoated) unless otherwise indicated, Type I, Class 1 (clear) or Class 2 (tinted) as indicated, Quality-Q3.

1. Fabrication Process: By horizontal (roller-hearth) process with roll-wave distortion parallel to bottom edge of glass as installed unless otherwise indicated.

C. Fabricate glazing units in sizes required to fit openings indicated for Project, with edge and face clearances, edge and surface conditions, and bite complying with written instructions of product manufacturer and referenced glazing publications, to comply with system performance requirements.

1. Allow for thermal movements from ambient and surface temperature changes acting on glass framing members and glazing components.

a. Temperature Change: 120 deg F, ambient; 180 deg F, material surfaces.

D. Glazing Gaskets: Manufacturer's standard sealed-corner pressure-glazing system of black, resilient elastomeric glazing gaskets, setting blocks, and shims or spacers.



E. Glazing Sealants: As recommended by manufacturer.

F. Sealants used inside the weatherproofing system shall have a VOC content of 250 g/L or less.

2.07 ACCESSORIES

A. Fasteners and Accessories: Manufacturer's standard corrosion-resistant, nonstaining, nonbleeding fasteners and accessories compatible with adjacent materials.

1. Use self-locking devices where fasteners are subject to loosening or turning out from thermal and structural movements, wind loads, or vibration.

2. Reinforce members as required to receive fastener threads. 3. Use exposed fasteners with countersunk Phillips screw heads, finished to match framing

system.

B. Anchors: Three-way adjustable anchors with minimum adjustment of 1 inch that accommodate fabrication and installation tolerances in material and finish compatible with adjoining materials and recommended by manufacturer.

1. Concrete and Masonry Inserts: Hot-dip galvanized cast-iron, malleable-iron, or steel inserts complying with ASTM A 123/A 123M or ASTM A 153/A 153M requirements.

C. Concealed Flashing: Dead-soft, 0.018-inch-thick stainless steel, ASTM A 240/A 240M of type recommended by manufacturer.

D. Exposed Flashing and Brake Metal: Prefinished aluminum to match, bends and hems shop fabricated with tight corners. Provide non-reactive isolators when in contact with dissimilar metals. 1. Flashing: 0.032-inch thick, minimum. 2. Brake Metal: 0.045-inch thick, minimum.

E. Bituminous Paint: Cold-applied asphalt-mastic paint complying with SSPC-Paint 12 requirements except containing no asbestos, formulated for 30-mil thickness per coat.

2.08 FABRICATION

A. Form or extrude aluminum shapes before finishing.

B. Weld in concealed locations to greatest extent possible to minimize distortion or discoloration of finish. Remove weld spatter and welding oxides from exposed surfaces by descaling or grinding.

C. Fabricate components that, when assembled, have the following characteristics:

1. Profiles that are sharp, straight, and free of defects or deformations. 2. Accurately fitted joints with ends coped or mitered. 3. Physical and thermal isolation of glazing from framing members. 4. Accommodations for thermal and mechanical movements of glazing and framing to

maintain required glazing edge clearances.



5. Provisions for field replacement of glazing from interior. 6. Fasteners, anchors, and connection devices that are concealed from view to greatest

extent possible.

D. Storefront Framing: Fabricate components for assembly using screw-spline system.

E. Entrance Door Frames: Reinforce as required to support loads imposed by door operation and for installing entrance door hardware.

1. At interior doors, provide silencers at stops to prevent metal-to-metal contact. Install three silencers on strike jamb of single-door frames and two silencers on head of frames for pairs of doors.

F. Entrance Door Hardware Installation: Factory install entrance door hardware to the greatest extent possible. Cut, drill, and tap for factory-installed entrance door hardware before applying finishes.

G. After fabrication, clearly mark components to identify their locations in Project according to Shop Drawings.

2.09 ALUMINUM FINISHES

A. High-Performance Organic Finish: Two-coat fluoropolymer finish complying with AAMA 2604 and containing not less than 50 percent PVDF resin by weight in color coat. Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers' written instructions.

1. Color and Gloss: As selected by Architect from manufacturer's full range.

2.10 SOURCE QUALITY CONTROL

A. Structural Sealant: Perform quality-control procedures complying with ASTM C 1401 recommendations including, but not limited to, assembly material qualification procedures, sealant testing, and assembly fabrication reviews and checks.

2.11 SELF ADHESIVE WINDOW FILM

A. Storefront system: White matte in arrangement indicated in the drawings. SOLYX: SXWF-WM as manufactured by Decorative Films, LLC, Frederick, Maryland; or equal. Film to cover up to 50% of the total glazed area in a pattern to be confirmed by the architect.

B. Other areas as indicated on the Drawings: Grey matte in arrangement indicated in the drawings. SOLYX: SXWF-WM as manufactured by Decorative Films, LLC, Frederick, Maryland; or equal. Film to cover the entire glazed area at each location indicated on the Drawings.



PART 3 - EXECUTION

3.01 EXAMINATION

A. Examine areas, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of the Work.

B. Proceed with installation only after unsatisfactory conditions have been corrected.

3.02 INSTALLATION

A. General:

1. Comply with manufacturer's written instructions. 2. Do not install damaged components. 3. Fit joints to produce hairline joints free of burrs and distortion. 4. Rigidly secure nonmovement joints. 5. Install anchors with separators and isolators to prevent metal corrosion and electrolytic

deterioration and to prevent impeding movement of moving joints. 6. Seal perimeter and other joints watertight unless otherwise indicated.

B. Metal Protection:

1. Where aluminum is in contact with dissimilar metals, protect against galvanic action by painting contact surfaces with materials recommended by manufacturer for this purpose or by installing nonconductive spacers.

2. Where aluminum is in contact with concrete or masonry, protect against corrosion by painting contact surfaces with bituminous paint.

C. Set continuous sill members and flashing in full sealant bed as specified in Section 079200 "Joint Sealants" to produce weathertight installation.

D. Install components plumb and true in alignment with established lines and grades.

E. Install weatherseal sealant according to Section 079200 "Joint Sealants" and according to sealant manufacturer's written instructions to produce weatherproof joints. Install joint filler behind sealant as recommended by sealant manufacturer.

F. Entrance Doors: Install doors to produce smooth operation and tight fit at contact points.

3.03 ERECTION TOLERANCES

A. Erection Tolerances: Install aluminum-framed entrances and storefronts to comply with the following maximum tolerances:

1. Plumb: 1/8 inch in 10 feet; 1/4 inch in 40 feet. 2. Level: 1/8 inch in 20 feet; 1/4 inch in 40 feet. 3. Alignment:



a. Where surfaces abut in line or are separated by reveal or protruding element up to 1/2 inch wide, limit offset from true alignment to 1/16 inch.

b. Where surfaces are separated by reveal or protruding element from 1/2 to 1 inch wide, limit offset from true alignment to 1/8 inch.

c. Where surfaces are separated by reveal or protruding element of 1 inch wide or more, limit offset from true alignment to 1/4 inch.

4. Location: Limit variation from plane to 1/8 inch in 12 feet; 1/2 inch over total length.

3.04 GLAZING, GENERAL

A. Comply with combined written instructions of manufacturers of glass, sealants, gaskets, and other glazing materials, unless more stringent requirements are indicated, including those in referenced glazing publications.

B. Protect glass edges from damage during handling and installation. Remove damaged glass from Project site and legally dispose of off Project site. Damaged glass includes glass with edge damage or other imperfections that, when installed, could weaken glass, impair performance, or impair appearance.

C. Install setting blocks in sill rabbets, sized and located to comply with referenced glazing publications, unless otherwise required by glass manufacturer. Set blocks in thin course of compatible sealant suitable for heel bead.

D. Do not exceed edge pressures stipulated by glass manufacturers for installing glass lites.

E. Provide spacers for glass lites where length plus width is larger than 50 inches

1. Locate spacers directly opposite each other on both inside and outside faces of glass. Install correct size and spacing to preserve required face clearances, unless gaskets and glazing tapes are used that have demonstrated ability to maintain required face clearances and to comply with system performance requirements.

2. Provide 1/8-inch minimum bite of spacers on glass and use thickness equal to sealant width. With glazing tape, use thickness slightly less than final compressed thickness of tape.

F. Provide edge blocking where indicated or needed to prevent glass lites from moving sideways in glazing channel, as recommended in writing by glass manufacturer and according to requirements in referenced glazing publications.

G. Set glass lites in each series with uniform pattern, draw, bow, and similar characteristics.

H. Set glass lites with proper orientation so that coatings face exterior or interior as specified.

I. Where wedge-shaped gaskets are driven into one side of channel to pressurize sealant or gasket on opposite side, provide adequate anchorage so gasket cannot walk out when installation is subjected to movement.



J. Square cut wedge-shaped gaskets at corners and install gaskets in a manner recommended by gasket manufacturer to prevent corners from pulling away; seal corner joints and butt joints with sealant recommended by gasket manufacturer.

3.05 GASKET GLAZING (DRY)

A. Cut compression gaskets to lengths recommended by gasket manufacturer to fit openings exactly, with allowance for stretch during installation.

B. Insert soft compression gasket between glass and frame or fixed stop so it is securely in place with joints miter cut and bonded together at corners.

C. Installation with Drive-in Wedge Gaskets: Center glass lites in openings on setting blocks, and press firmly against soft compression gasket by inserting dense compression gaskets formed and installed to lock in place against faces of removable stops. Start gasket applications at corners and work toward centers of openings. Compress gaskets to produce a weathertight seal without developing bending stresses in glass. Seal gasket joints with sealant recommended by gasket manufacturer.

D. Installation with Pressure-Glazing Stops: Center glass lites in openings on setting blocks, and press firmly against soft compression gasket. Install dense compression gaskets and pressure-glazing stops, applying pressure uniformly to compression gaskets. Compress gaskets to produce a weathertight seal without developing bending stresses in glass. Seal gasket joints with sealant recommended by gasket manufacturer.

E. Install gaskets so they protrude past face of glazing stops.

3.06 SELF ADHESIVE WINDOW FILM

A. Except as otherwise specified hereunder, install and clean the self adhesive window film in strict accordance with the approved shop drawings and manufacturers recommendations.

B. Upon completion of the installation, thoroughly clean all surfaces free from handling marks, dirt, and foreign matter.

END OF SECTION 084213



NON-TEXT PAGE


GLASS AND GLAZING 088000 - 1

SECTION 088000

GLASS AND GLAZING (Filed Sub-Bid required)

PART 1 - GENERAL

1.00 GENERAL PROVISIONS

A. Sub-bids shall be submitted in accordance with the provisions of Massachusetts General Laws (Ter Ed) Chapter 149, Sections 44A to 44I, inclusive, as amended. The time and place for submission of sub-bids shall be as set forth in the INSTRUCTIONS TO BIDDERS.

B. Each sub-bid filed with the Awarding Authority must be accompanied by BID

BOND, or CASH, or CERTIFIED CHECK, or TREASURER'S CHECK or CASHIER'S CHECK, issued by a responsible bank or trust company, payable to the CITY OF CAMBRIDGE in the amount of five-percent (5%) of the bid amount. A bid accompanied by any other form of bid deposit will be rejected.

C. Each sub-bid, submitted for the work of this SECTION, shall be on a form furnished

by the Awarding Authority, as required by Section 44F of Chapter 149, as amended. D. Work to be done under this SECTION is shown on Drawings numbered: G1.1, G1.2,

A1.1, A2.1, A2.2, A3.1, A3.2, A5.1, A5.2, A6.1 through A6.4 inclusive, A8.1, K-1.

1.01 GENERAL PROVISIONS

A. PART A and DIVISION 1 of PART B, as listed in the TABLE OF CONTENTS, are hereby made part of this SECTION by reference thereto.

1.02 WORK TO BE PERFORMED

A. Furnish and install the following:

1. Glass for hollow metal doors, pressed steel frames, and for other conditions indicated on the Drawings, except as otherwise specified.

2. Fire-rated glazing installed as vision lights in fire-rated wood doors and for other conditions indicated on the Drawings, except as otherwise specified.

3. Prefinished, insulated spandrel panels. 3. All materials required to properly install glass furnished hereunder, including

sealants, tapes, setting blocks, and spacers.

B. Install the following as furnished under the designated SECTIONS:

1. Metal glazing beads for hollow metal doors and pressed steel frames: SECTION 081113, STEEL DOORS AND FRAMES.

C. Perform initial cleaning of all glass furnished hereunder.

1.03 RELATED WORK



A. The following related work will be performed under the designated SECTIONS:

1. Framed mirrors: SECTION 102813, TOILET ACCESSORIES. 2 Final cleaning of glass: SECTION 015000, CONSTRUCTION FACILITIES

AND TEMPORARY CONTROLS.

1.04 SUBMITTALS

A. Submit the following in accordance with the provisions of SECTION 013300, SUBMITTAL PROCEDURES:

1. Samples:

a. Glass: 12 by 12 inches, in each specified type and thickness. b. Glazing tape: 12-inch length of specified type and size.

2. Literature: Manufacturer's product data, including specifications, for glass, glazing tape, and all other pertinent data for items to be furnished hereunder.

3. Certification: Certified written affidavit stating that all glass, to be furnished,

meets or exceeds the requirements specified herein. 4. Manufacturer's installation instructions for Fire-Protection-Rated Glazing

5. Product Test Listings: From UL indicating fire-rated glass complies with

requirements, based on comprehensive testing of current product.

1.05 REFERENCE STANDARDS, SPECIFICATIONS, AND CODES

A. The following are hereby made a part of this SECTION by reference thereto:

1. American National Standards Institute - ANSI Z97.1. Performance Specifications

and Methods of Test for Safety Glazing Material Used in Buildings. 2. Flat Glass Manufacturer's Association Glazing Manual, current edition. 3. Federal Safety Standard 16 CFR 1201. 4. Customer Product Safety Commission-Safety Standard for Architectural Glazing

Materials. 5. ASTM Standard C-1036, for non-tempered glass; and ASTM Standard C-1048

Kind FT, for tempered glass. 6. PPG Industries, Inc. Technical Service Memo “EFGT window Units”, 11/22/85. 7. SIGMA publications: “Test Method for Chemical Effects of Glazing Compounds

on Elastometric Edge Seals” and “SIGMA Glazing Manual



PART 2 - PRODUCTS 2.01 GLASS AND GLAZING MATERIALS

A. Glass types:

1. Tempered glass for all interior doors, sidelights and borrowed lights other than

fire-rated doors: Clear, heat-tempered float glass, conforming to ASTM Standard C-1048, Kind FT, 1/4-inch thick, permanently labeled as tempered glass, except as otherwise indicated.

2. Clear non-tempered float glass: Clear polished float glass conforming to ASTM

Standard C-1036, 1/4-inch thick, except as otherwise indicated. 2. Insulated glass for exterior doors, sidelights, borrowed lights, transoms and other

locations indicated on the Drawings: Factory-fabricated insulating glass units comprised of Green Tinted, 0.45 shading coefficient, select quality tempered safety glass, complying with ASTM C 1048, low E-coated, double-light sealed insulating glass, 5/8-inch thick, as manufactured by Pittsburgh Plate Glass, Guardian Industries, LOF, or equal, bearing the standard SIGMA 10 year warranty for all insulating glass, SIFMA.IGCC certifies to performance level CBA when tested in accordance with ASTM E 774. Provide standard SIGMA 10-year warranty for all insulating glass. Permanently-impair manufacturer's stamp showing date of manufacture on corner of each unit.

3. Fire-rated glass: Firelite as manufactured by Nippon Electric Glass Company, Ltd., and distributed by Technical Glass Products, 8107 Bracken Place SE, Snoqualmie, WA; or similar products as manufactured by Pilkington Group Limited, Kirkland WA; Safti First, San Francisco, CA; or approved equal.

a. Performance requirements:

i. Fire-rated glass ceramic clear and wireless glazing material listed for use in non-impact safety-rated locations such as transoms and borrowed lites with fire rating requirements of 60 minutes with required hose stream test.

ii. Passes positive pressure test standards UL 10C.

b. Properties: i. Thickness: 3/16 inch [5 mm].

ii. Weight: 2.56 lbs/ft2 or 12.5 kg/m2 iii. Approximate Visible Transmission: 88 percent. iv. Approximate Visible Reflection: 9 percent. v. Hardness (Vicker’s Scale): 700.

vi. Fire-rating: 20 minutes to 90 minutes. vii. Impact Safety Resistance: None.

viii. Positive Pressure Test: UL 10C; passes. ix. Surface Finish: Standard Grade x. Positive Pressure Test: UL 10C; passes.

c. Labeling: Permanently label each piece of glass with UL logo and fire rating.



d. Fabricate glazing units in sizes required to fit openings indicated for Project, with edge and face clearances, edge and surface conditions, and bite complying with written instructions of product manufacturer and referenced glazing publications, to comply with system performance requirements.

i. Allow for thermal movements from ambient and surface temperature changes acting on glass framing members and glazing components.

1. Temperature Change: 120 deg F, ambient; 180 deg F, material surfaces.

C. Glazing materials:

1. Setting blocks: Neoprene, 70-90 durometer hardness, 4 inches long, minimum. 2. Glazing tape: Closed cell vinyl foam tape, pressure-sensitive one face, 2 inches

wide by 3/16-inch thick, Norseal V-780, as manufactured by Norton Company, Hi-Lo Closed Cell Vinyl Foam Tape, or equal. Provide solvent recommended by tape manufacturer for sealing exposed edges of tape on exterior applications.

4. Glazing bolts, nuts and neoprene washers for attaching laminated safety glass to

metal guardrail assemblies: Chrome plated steel or brass decorative glazing fasteners.

2.02 GLAZING COMPOUND FOR FIRE-RATED GLAZING MATERIALS A. Glazing Tape: Closed cell polyvinyl chloride (PVC) foam, coiled on release

paper over adhesive on two sides, maximum water absorption by volume of 2 percent.

B. Setting Blocks: Neoprene, EPDM or hardwood; tested for compatibility with

glazing compound; of 70 to 90 Shore A hardness.

C. Cleaners, Primers, and Sealers: Type recommended by manufacturer of glass and glass products.

2.03 METAL SPANDREL PANELS

A. Metal Composite Material Panels: Provide factory-formed and -assembled, metal composite material wall panels fabricated from two metal facings that are bonded to a solid, extruded thermoplastic or plastic cellular core; formed into profile for installation method indicated. Include attachment assembly components, and accessories required for weathertight system. 1. Basis-of-Design Product: Subject to compliance with requirements, provide

Omega-Lite Composite Panels, Clip and Caulk System, as manufactured by Laminators Incorporated of Hatfield, PA, or comparable product by one of the following:

1. 3A Composites USA, Inc. 2. Alcoa Inc. 3. Firestone Metal Products, LLC.

B. Aluminum-Faced Composite Panels: Formed with 0.020-inch-thick, coil-coated aluminum sheet facings.



1. Panel Thickness: 0.236 inch (6 mm). 2. Core: Standard. 3. Exterior Finish: Two-coat fluoropolymer, Kynar 500, or equal.

a. Color: As selected by Architect from manufacturer's full range. C. Attachment Assembly Components: Formed from extruded aluminum.

D. Attachment Assembly: Manufacturer's standard clip system, and subgirt and spline

system. Refer to Drawings for locations. PART 3 - EXECUTION

3.01 DELIVERY AND STORAGE

A. Deliver materials when and as required and store in a safe location as directed. Do not unpack material until it is to be set, unless packing is required for inspection by the Architect.

3.02 ACCEPTANCE OF INSTALLATION CONDITIONS

A. Be fully responsible for the proper execution and performance of the work described herein. Inspect all installation conditions and request the Contractor to correct any conditions which may affect work adversely.

3.03 PREPARATION FOR GLAZING

A. Ensure that receiving surfaces are dry and free from dust, or other foreign materials

before glazing. Clean all surfaces with cloth saturated with mineral spirits of high-flash naphtha as recommended by glazing tape manufacturer, before glazing.

B. Check all openings, prior to glazing, to make certain that the opening is square,

plumb and secure in order that uniform face and edge clearances are maintained. Inspect all butt and miter joints and remove all projections from fixed rabbets.

C. Ensure that all glass has been cleanly and accurately cut to properly fit the openings,

allowing the necessary clearances for glazing materials. Do not nip edges, to remove flares or to reduce oversize dimensions, under any circumstance. Provide proper glass edge protection to prevent abrasion from contact with concrete and masonry surfaces.

D. Sizes of glass indicated on the Drawings are approximate only. Determine the actual

sizes required by measuring the receiving openings. Size glass to permit required clearance and bite around full perimeter of glass, as set forth in the referenced FGMA standards.

3.04 GLAZING

A. Installation of glass in doors and frames: Place setting blocks at quarter points. Apply

continuous strip of specified foam tape around perimeter of glass with adhesive side of tape toward glass. Turn tape onto each surface of the glass to form a channel around the entire perimeter. Set glass in place, and attach the glazing beads with sufficient pressure against the tape to compress the tape to approximately seventy (70) percent of its original thickness. After applying glazing beads, trim off excess



tape with razor blade, or other sharp tool, level with sight line. Wherever glazing tape is exposed to the exterior, apply manufacturer's recommended solvent to edge of the tape to provide a weather seal.

B. Install Fire-Protection-Rated Glazing in strict accordance with manufacturer's

instructions.

3.05 GLASS BREAKAGE

A. Replace with new materials of similar types and thicknesses all glass which is broken, cracked, or otherwise damaged in executing the glass and glazing work, or caused by the installation of faulty work hereunder, at no additional cost to the Contract. Replace all glass breakage and glass damage caused by other trades, due to negligence or any other reason, and the costs for such replacements will be borne by the trade responsible for the damage, or by the Contractor, if responsibility cannot be determined.

B. Identify all glazed openings with markers such as tapes or flags that are not in contact

with the glass, but which are held in position away from the glass and attached to the framing members. Do not apply markers to surface of glass.



3.06 CLEAN UP AND CLEANING OF GLASS

A. Remove all labels, excess glazing tape, stains, and spots from glass upon completion of glazing work.

B. Remove all rubbish and debris from the site at the end of each day's work. Clean

sealant smears and stains from adjacent surfaces as the work progresses. C. At the completion of the entire project, all glass surfaces will be professionally

cleaned and polished, at the Contractor's expense, under SECTION 015000, CONSTRUCTION FACILITIES AND TEMPORARY CONTROLS.

END OF SECTION



NON-TEXT PAGE


ENTRANCE FLOOR GRILLES 124816 - 1

ADDENDA NO. 3

SECTION 124816

ENTRANCE FLOOR GRILLES PART 1 - GENERAL

1.01 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.02 WORK TO BE PERFORMED

A. Furnish and install the following:

1. Surface mounted (flush with tile) carpet-faced aluminum foot grilles, with aluminum frame, for entrances where so indicated on the Drawings.

1.03 RELATED WORK

A. The following related work will be performed under the designated SECTIONS:

1. Finish flooring: By the SECTIONS responsible for relevant finish flooring.

1.04 SUBMITTALS

A. Submit the following in accordance with the provisions of SECTION 013000, SUBMITTAL PROCEDURES: 1. Shop drawings: Dimensioned plan layout of each area receiving foot grilles

hereunder; large scale details of grille and frame construction; and installation details coordinated to the actual conditions at each location.

2. Samples: 12 by 12-inch segment of grille; corner section of recessed frame; and

manufacturer's standard color samples of carpet insets, for selections by the Architect.

3. Literature: Stainless steel manufacturer's complete product data and

specifications for foot grille system. 4. Guarantee: Manufacturer's written guarantee, covering foot grilles and frames

against defects in material and manufacturing workmanship for a period of not less than 2 years from date of delivery to the project.

PART 2 - PRODUCTS

2.01 MATERIALS FOR GRILLES AND FRAMES A. Surface Type:


ENTRANCE FLOOR GRILLES 124816 - 2 ADDENDA NO. 3

1. Manufacture and type: Construction Specialties, Inc. Pedimat AA, M2; Reese

No. 470 Perfec Clean Carpet Tread; MM Systems Series GCT; or equal. 2. Grids: 6063-T52 aluminum alloy, 2-inch nominal, extruded, tongue and groove

interlocking tread rails, with heavy duty, 100% Antron nylon carpet strips, in color as selected by the Architect, inserted into keyed reveals of rails, with 1/2 inch nominal overall depth of frame and carpet insert.

a. Construction Specialties, Inc. Pedimat AA rails 17A001, with carpet inserts

19C010, or equal. b. Corrugated vinyl inserts for starter and end courses in mat, with integral

tongue along one edge to connect to tongue and groove rails, 1-inch wide, in color selected by the Architect: Construction Specialties, Inc. Pedimat AA Square End Vinyl, 17V013.

3. Frames: Tapered Angle Frame for surface mount locations, fabricated from 6063-

T52 aluminum alloy, neatly coped and mechanically-connected at corners, of sizes to compatibly receive the grilles. Provide frames punched for anchoring to concrete. Factory-apply isolation coating of zinc chromate primer to all surfaces of frames which will be in direct contact with concrete.

a. Construction Specialties, Inc. Pedimat AA Aluminum Tapered Angle Frame

16A051, or equal. C. Finish for all exposed to view aluminum surfaces: To be selected by Architect. D. Fasteners for attaching frame to concrete: Manufacturer's standard stainless steel

concrete fastener, 1/4-inch, minimum.

PART 3 - EXECUTION

3.01 INSTALLATION A. Install the surface place grilles in accordance with manufactures requirements and

recommendations. B. Upon completion of the installation, vacuum-clean the carpeted surfaces, remove all

labels and temporary markings from each unit, and remove all rubbish and debris caused by the work of this SECTION 124816.

END OF SECTION

ROOM 201 - FIRE POLEScale: 1/4" = 1'-0"1

2"3'

-8"

V.I.F

.

2"7'

-2"

10"

4 1/2"4'-0"4 1/2"

A B C D

6A6.2

4 1/2"4'-0"4 1/2"4 1/2"4'-0"4 1/2"

3'-8

"V.

I.F.

2"7'

-2"

10"

4 1/2"4'-0"4 1/2"

2"

NOTE:ALUMINUM-FRAMED STOREFRONT FIRE POLE ENCLOSURE HEIGHT TO REACH UNDERSIDE OF EXISTING CEILING FINISH. VERIFY IN FIELD CEILING HEIGHT PRIOR TO ASSEMBLY. OVERALL SIZE/DIMENSION IS TO BE COORDINATED WITH 108000 NEW SLIDE POLE RAILS AND GATE ARMS.

1

2SIM. 2

2"3'

-8"

V.I.F

.

2"7'

-2"

10"

5

4

3

TYP.

TYP.3'-8

"V.

I.F.

2"7'

-2"

10"

2"

4'-8"

108000OVERALL SIZE/DIMENSION IS TO BE COORDINATED

WITH 108000 NEW SLIDE POLE RAILS AND GATE ARMS.

SKA-01

Date:

Scale:

Drawn By:

10-16-2020 Title:

Sheet No.:

RIVER ST. FIRE HOUSERENOVATION

CAMBRIDGE FIRE DEPARTMENT176 River Street

Cambridge, MA 02139

ALUMINUM-FRAMED STOREFRONT FIRE POLE ENCLOSURE SYSTEM AS NOTED

NWD6/A6.2

PREFINISHED ALUM. STOREFRONT DOOR SYSTEM

BACKER ROD & SEALANT, TYP.

084213

071000EXISTING CEILING

1/2"

2"


084213

1 3/

4"

1/2" IMPACT RESISTANT GLAZING SYSTEM, TYP.

DOOR AND FRAME DETAILSScale: 3" = 1'-0"2

2

1

3

HEADER

DOORHEADER

DOORTHRESHOLD


084213

NEW FINISH FLOOR. REFER TO FINISH SCHEDULE.

NEW ALUMINUM DOOR THRESHOLD IN BED OF SEALANT

08421310"

5 CORNER JAMB

4 1/2"

4 1/

2"


084213


4 DOOR JAMB


084213


SKA-02

Date:

Scale:

Drawn By:

10-16-2020 Title:

Sheet No.:



Cambridge, MA 02139

SURFACE-PLACED FLOOR MAT LOCATIONSAS NOTED

NWDA2.1 & A2.2

W/D

Gear Dryer

12

34

56

101

104

FLOOR MAT LOCATION AT DOOR 104Scale: 1/4" = 1'-0"1

SURFACE-PLACED FLOOR MATIN CENTERLINE WITH DOOR

104

3

3

4'-8

"

3

124816

4'-0

"

4'-0"

4'-6

"7'

-6"

CLOF DOOR

DN

Ice

103 102

X02

FLOOR MAT LOCATION AT DOORS 102 & X02Scale: 1/4" = 1'-0"2

4'-0"CLR

ICE MACHINE

3

INFILL OPENING TO MATCH DEPTH OF WALL, TYP.

1A

3'-4

"M

.O.

3'-0

"

114000 7'-0

"

4'-0"SURFACE-PLACED FLOOR MAT

124816

2"

2"

206

209208

207

DN

SHAFTSHAFT

FLOOR MATT LOCATION AT DOOR 206Scale: 1/4" = 1'-0"3

3'-6"

DC

BA6

A6.3

4'-2

"2'

-0" 3"

6

SURFACE-PLACED FLOOR MAT

124816

3'-0

"

4'-0"

CLOF DOOR

SKA-03

Date:

Scale:

Drawn By:

10-16-2020 Title:

Sheet No.:



Cambridge, MA 02139

DEMOLITION SCOPE OF SUPPORT SYSTEM AT FIRE POLEAS NOTED

NWD2 / D1.1

X01

OH2OH1

105

FIRST FLOOR PLAN - DEMOScale: 1/4" = 1'-0"2

EXISTING FIRE POLE TO REMAIN

EXISTING FIRE POLE AND SUPPORTS TO REMAIN, ALL OTHER COMPONENTS (INCLUDING, BUT NOT LIMITED TO LANDING PAD, FLOOR/CEILING CLAMSHELL ASSEMBLY, GAURDS, ETC.) ARE TO BE REMOVED AND UPON OWNER'S REQUEST, PROPERLY DISPOSED.

024119

2D1.1

SKA-04

Date:

Scale:

Drawn By:

10-16-2020 Title:

Sheet No.:



Cambridge, MA 02139

REVISED UL LABEL AT DOOR SCHEDULEN.T.S.

NWDA8.1

DOOR SCHEDULE VERIFY ALL EXIST. CONDITIONS IN FIELDDoor Room Door UL Hdwr Under Frame NotesNo. From To Type Mat'l Width Ht Thick Label Set Cut Type Mat'l Head Jamb Sill

001 001 000 D HM 3'-0" 7'-0" 1 3/4" C 4 NO 1 HM 7 SIM 7 SIM - CONTINUOUS GASKETING AT PERIMETER002 000 002 A HM 2'-8" 7'-0" 1 3/4" - 3 3/4" 1 HM 6 6 - -003 000 003 A HM 3'-0" 7'-0" 1 3/4" - 6 - 1 HM 6 6 - -004 000 004 A HM 3'-0" 7'-0" 1 3/4" B 3 NO 1 HM 7 SIM 7 SIM - -005 000 005 A HM 3'-0" 7'-0" 1 3/4" - 5 - 1 HM 6 6 - -006 000 006 A HM 3'-0" 7'-0" 1 3/4" B 6 NO 1 HM 7 SIM 7 SIM - -101 101 100 B HM/GLASS 3'-0" 7'-0" 1 3/4" - -9 - 1 HM 7 7 - CONTINUOUS GASKETING AT PERIMETER102 102 104 D HM/GLASS 3'-0" 7'-0" 1 3/4" C 4 - 1 HM 6 SIM 6 SIM - CONTINUOUS GASKETING AT PERIMETER103 104 103 A HM 3'-0" 7'-0" 1 3/4" - 2 - 1 HM 7 7 - CONTINUOUS GASKETING AT PERIMETER104 104 101 B HM/GLASS 3'-0" 7'-0" 1 3/4" - 4 - 1 HM 7 7 - CONTINUOUS GASKETING AT PERIMETER105 105 100 A HM 3'-0" 7'-0" 1 3/4" - -3 - 1 HM 6 SIM 6 SIM - CONTINUOUS GASKETING AT PERIMETER202 200 202 B HM 3'-0" 7'-0" 1 3/4" - 9 - 2 HM 6 SIM 6 SIM - -203 203 202 C GLASS 3'-0" 7'-0" 1/2" - 7 NO S1 MTL - - - 1/2" IMPACT RESISTENT GLASS. REFER TO GLASS TYPES. CONTINUOUS GASKETING AT PERIMETER

204A 200 204A A HM 3'-0" 7'-0" 1 3/4" - 1 - 2 HM 6 SIM 6 SIM - -204B 200 204B A HM 3'-0" 7'-0" 1 3/4" - 1 - 2 HM 6 SIM 6 SIM - -204C 200 204C A HM 3'-0" 7'-0" 1 3/4" - 1 - 2 HM 6 SIM 6 SIM - -205 200 205 A HM 2'-8" 7'-0" 1 3/4" - 1 - 2 HM 6 6 - -206 200 206 D HM 3'-0" 7'-0" 1 3/4" C 4 NO 1 HM 6 SIM 6 SIM - CONTINUOUS GASKETING AT PERIMETER207 200 207 A HM 3'-0" 7'-0" 1 /34" - 1 - 2 HM 6 6 - -208 200 208 A HM 3'-0" 7'-0" 1 3/4" - 1 - 2 HM 6 SIM 6 SIM - -209 208 209 A HM 2'-8" 7'-0" 1 3/4" - 3 3/4" 1 HM 6 6 - -210 208 210 A HM 2'-8" 7'-0" 1 3/4" - 2 - 1 HM 6 6 - -211 208 211 A HM 3'-0" 7'-0" 1 3/4" - 2 - 1 HM 6 6 - -212 208 212 A HM 3'-0" 7'-0" 1 3/4" - 2 - 1 HM 6 6 - -301 300 301 D HM 3'-0" 7'-0" 1 3/4" C 10 NO 1 HM 6 SIM 6 SIM - CONTINUOUS GASKETING AT PERIMETER302 300 302 A HM 3'-0" 7'-0" 1 3/4" - -3 - 1 HM 6 SIM 6 SIM - -OH1 100 EXTERIOR EXIST EXIST EXIST EXIST EXIST EXIST 8 EXIST EXIST EXIST EXIST EXIST EXIST EXISTING EXTERIOR DOOR - NO WORKOH2 100 EXTERIOR EXIST EXIST EXIST EXIST EXIST EXIST 8 EXIST EXIST EXIST EXIST EXIST EXIST EXISTING EXTERIOR DOOR - NO WORKX01 100 EXTERIOR B HM/GLASS 3'-0" 7'-0" 1 3/4" - 11 NO 1 HM 3 SIM 4 SIM - CONTINUOUS GASKETING AT PERIMETERX02 102 EXTERIOR B HM 3'-0" 7'-0" 1 3/4" C -11 NO 1 HM 3 4 - THERMALLY BROKENX03 107 EXTERIOR A HM 3'-0" + 2'-0" 7'-0" 1 3/4" C 12 NO 2 HM 3 SIM 4 SIM - THERMALLY BROKEN

60 MIN

60 MIN

60 MIN

60 MIN60 MIN

DOOR SCHEDULE1SHEETA8.1

60 MIN

SKA-05

Date:

Scale:

Drawn By:

10-16-2020 Title:

Sheet No.:



Cambridge, MA 02139

DOOR TYPES AND GLAZING DIMENSIONSN.T.S.

NWDA8.1

DOOR TYPES1SHEETA8.1

B

HM / GLASSSe

e Sc

hedu

le

A

HM

See

Sche

dule

DOORS

See ScheduleSee Schedule

1 1" TEMPERED INSULATED GLASS

GLASS SCHEDULE 088000

1

2 1/2" IMPACT RESISTENT GLASS

C

GLASS

2

3 1/4" TEMPERED GLASS

3

@EXT.

@INT.

D

HM / GLASS

See

Sche

dule

See Schedule

2'-0"

4'-0

"2'

-0"

10"

8"

3'-3

"3'

-3"

2'-2"5"

4 FIRE-RATED GLASS

4

See

Sche

dule

See Schedule

3'-0

"3'

-6"

6" 6"

(E) B

EAM

2x12@16" OCS

(E) JOISTS

NEW LINTEL SEESCHEDULE AT DETAIL1 ON S1.2

(E) B

EAM

(E) B

EAM

(E) JOISTS (E) JOISTS (E) JOISTS

P1 UP

NEW STUD WALL 400S162-33 @ 16" OCBLOCK SOLID BELOW WALLSTARTS. PROVIDE JOISTHANGERS BETWEEN EXISTINGJOISTS AND BEAMS AS REQUIRED.

S1

S1(E) JOISTS

3-2x12

2-2x12P1 UP

2-2x12

2-2x

12

GC TO VERIFYEXISTINGSTRUCTURE FOREOR TO REVIEW

Date:

Scale:

Drawn By:

Title:

RIVER STREET FIRE HOUSERENOVATION

Cambridge, MassachusettsSheet No.:

SK-1

14-Oct-2020

3/16"=1'-0"

FFBSECOND FLOOR FRAMING PLAN

REF. S2.1

NOTES:1. INDICATES SPAN OF 3 4" T&G PLYWOOD GLUED &

NAILED TO JOISTS & BEAMS.2. INDICATES EXISTING JOIST OR BEAM.3. INDICATES NEW JOIST OR BEAM.

4. INDICATES SADDLE BEAM CONNECTION SEE 3 ON S1.2

5. P1 INDICATES 312x31

2 LVL POST

6. INDICATES END PLATE CONNECTION SEE 7 ON S1.2

S

S1

AFIRST FLOOR FRAMING PART PLAN

A

AA

A

W8x18

W8x

18

W8x

18

S

(E) CONC SLAB

8 SIMS1.2

8S1.2

Date:

Scale:

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Title:



SK-2

13-Oct-2020

3/16"=1'-0"

FFBFIRST FLOOR FRAMING PART PLAN & ATTIC FRAMING PLAN

REF. S2.1

7 SCALE: 1" = 1'-0"

EXISTING CMU WALL ORCONCRETE COLUMN

8"

1'-0"

2"

END PLATE3

8"x1'-0"x1'-212"

4-5 8"ØEXPANSIONBOLTS w/ 4"EMBEDMENT

W8 OR W10W8

8"4"

PLATE 3 8" w/ HORIZONTALSSL HOLES

2-3 4"Ø A325 BOLTS

NOTE:AT MASONRY WALL, USE5

8"Ø HILTI HY70 MASONRYRENOVATION ANCHORSw/ 6" EMBEDMENT

SCALE: 1" = 1'-0"8

PLATE 14"x3"x3"@24" OC w/ 12"ØEXPANSION BOLTw/ 21

2" EMBEDMENTNEW BEAMSEE PLAN

(E) SLAB

CUT SLAB. SEEDEMO PLANS

Date:

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SK-3

13-Oct-2020

AS NOTED

FFBSECTIONS 7 & 8

REF. S1.2

6" DRY UP

4" F UP

1" SPD UP

2"

2"

2"

1"

4"

2"

CAP (TYP.)

2"2"

SP

R

MDF RM

004

3

F

SP

D

DR

Y

4" 4"

6"

1"

4"

2"2"

SP

R

CUST.

002

F

F

DRY

DR

Y

SPD

2"

2" 2"

3

F

SP

D

DR

Y

2"

2"

2"

2"

2"

4"

6"

1"

4"

4"

SP

RS

PR

FLOOR CONTROL

VALVE

3

Date:

Scale:

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Title:

RIVER STREET FIRE HOUSE

RENOVATION

Cambridge, Massachusetts

Sheet No.:

13-OCT-20

375 Faunce Corner Road - Suite D, N. Dartmouth, MA

CONSULTING ENGINEERS INC.

GARCIA GALUSKA DESOUSA

508 - 998 - 5700 FAX 508 - 998 - 0883 E - MAIL info@g - g - d . com

02747 - 1271

Date:

Scale:

Drawn By:

Title:


RENOVATION


Sheet No.:

13-OCT-20





02747 - 1271

AD-3-SKFP-1

PARTIAL BASEMENT PLANS - FIRE

PROTECTION

1/4" = 1'-0"

MAM

PARTIAL BASEMENT PLAN

SCALE 1/4" = 1'-0"

1


SCALE 1/4" = 1'-0"

2


SCALE 1/4" = 1'-0"

3

AD-3-SKFP-1AD-3-SKFP-1AD-3-SKFP-1

SHAFT

4"

1"

1"1 1/4"

1"

SP

R

F

SP

D

1 1/4"

1 1/4"

SPD

1"

6" DRY UP

4" F UP

1" SPD UP

SPRINKLER FLOOR

CONTROL VALVE

5

FP0.1

6"

1"

DRY

6" DRY DN

4" F DN

1" SPD DN

3

SHAFT

DN

CUST.

209

6" DRY UP

SPRINKLER FLOOR

CONTROL VALVE

SP

RS

PR

1 1/2"

1 1/4"

4"

4"

1"

4"

1"

1 1/4"

5

FP0.1

1 1/4"

6" DRY DN

4" F DN

1" SPD DN

DR

Y

4"

1"

SEMI-RECESSED PENDENT

SPRINKLER HEAD & UPRIGHT

SPRINKLER HEAD (TYPICAL)

3

DR

YD

RY

6" DRY DN

DRY

6"

2"

2"

2"

2"

4"

4"

UPRIGHT SPRINKLER

HEAD (TYPICAL)

2"

2"

2"

2"

3

Date:

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RENOVATION


Sheet No.:

13-OCT-20





02747 - 1271

Date:

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RENOVATION


Sheet No.:

13-OCT-20





02747 - 1271

AD-3-SKFP-2

PARTIAL FLOOR PLANS - FIRE PROTECTION

1/4" = 1'-0"

MAM

PARTIAL FIRST FLOOR PLAN

SCALE 1/4" = 1'-0"

1

AD-3-SKFP-2

PARTIAL SECOND FLOOR PLAN

SCALE 1/4" = 1'-0"

2PARTIAL ATTIC FLOOR PLAN

SCALE 1/4" = 1'-0"

3

AD-3-SKFP-2 AD-3-SKFP-2

Date:

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RENOVATION


Sheet No.:

13-OCT-20





02747 - 1271

AD-3-SKP-1

DOMESTIC WATER RISER DIAGRAMS -

PLUMBING

NONE

MAM

LEVEL 2

LEVEL 1

P-1

TOILET

103

1"

SA A w/ AP

1/2"

P-2

P-1P-3 P-3

P-2

P-1P-3

SHOWER/CHANGING

ROOM

210

SHOWER/CHANGING

ROOM

211/212

1 1/4"

SA B w/ AP

1"

SA A w/ AP

P-3

EWH-12 EWH-14

1/2"

1 1/4"

1 1/4"

1/2" HB

1"

EWH-10

P-2

EWH-11

1 1/4"

EWH-9

1 1/4"

EWH-8

P-2

EWH-6

1/2"

EWH-15

1 1/4"

1/2"

1/2" HB

1/2"

P-1

3

3

1/2"

3/4"

1 1/4"

3

ROOF

Date:

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RENOVATION


Sheet No.:

13-OCT-20





02747 - 1271

SANITARY WASTE & VENT RISER DIAGRAMS

- PLUMBING

NONE

MAM

ROOF

LEVEL 2

3"

4"

4"

4"

P-1

2"

P-2

2"

2"

3"

4"

4"

P-2

2"

2"

4"

P-3P-3 3" FD 'B'3" FD 'B'

4"

2"

P-3

3" FD 'A'

SHOWER/CHANGING

ROOM

210

SHOWER/CHANGING

ROOM

211/212

3"

4"

P-1

4"

3"

3" FD 'A'

2"

P-7

2"

2"

3"

P-2

2" 2"

P-5

GD-1

2"

3"

P-1

2"

2" 3"

3" 3" 3"

P-3

3

3

AD-3-SKP-2

Date:

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RENOVATION


Sheet No.:

13-OCT-20





02747 - 1271

AD-3-SKP-3

SANITARY WASTE & VENT RISER DIAGRAMS

- PLUMBING

NONE

MAM

3"

2"

4"

4"

LEVEL 2

LEVEL 1

2"

P-1

2"

P-2

4"

4"

4"

3"

4" FD 'E'

P-7

2"

2"

P-3

TOILET

103

DECON

104

3"

2"

4" FD 'B'

3" 3"

3"

2"

4" FD 'B'

4" 3"

3

3

4"

City of Cambridge€¦ · 19/10/2020 · City of Cambridge 795 Massachusetts Avenue, Cambridge,...

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Transcript of City of Cambridge€¦ · 19/10/2020 · City of Cambridge 795 Massachusetts Avenue, Cambridge,...