Technical Assignment #3 PROJECT DELIVERY …...CRAIG DUBLER Construction Management Option Steven F....

CRAIG DUBLER Construction Management Option Steven F. Udvar-Hazy Center, Chantilly, VA November 12, 2003

Technical Assignment #3

PROJECT DELIVERY EVALUATION

TABLE OF CONTENTS

EXECUTIVE SUMMARY …………………………………………………………………………….. 2

SITE LAYOUT PLANNING ………………………………………………………………………….. 3-5

TEMPORARY UTILITIES ……………………………………………………………………………. 6-7

DETAILED STRUCTURAL SYSTEMS ESTIMATE …………………………………………………. 8-12

GENERAL CONDITIONS ESTIMATE ………………………………………………………………. 13-15

PROJECT SCHEDULE ……………………………………………………………………………….. 16

PROJECT CASH FLOW …………………………………………………………………………….. 17

CRAIG DUBLER STEVEN F. UDVAR-HAZY CENTER

2

EXECUTIVE SUMMARY

During this technical assignment, I developed a better understanding of the

building systems and related construction costs. This development was achieved through the research of several different categories which include: Site Layout Planning, Temporary Utilities, Detailed Structural Systems Estimate, General Conditions Estimate, Project Schedule, and Cash Flow. Site Layout Planning Site plans for excavation, superstructure and finish phases of the project are included in this section. A list of description explaining the key features of the site layout follows. Temporary Utilities Requirements of supporting installment for two materials from the project are explained in detail. The requirements can be applied to the people working on the site and to the structure. Detailed Structural Estimate A detailed structural estimate is prepared. This includes the foundation system, the quantity of concrete, quantity of steel for columns and beams, roof, equipment cost and others. Spreadsheets with quantity showing and estimate from MC^2 are attached. General Conditions Estimate In this section, a General Conditions estimate is developed in MC^2 from the Staffing plan that previous assignment had put together. This includes general costs that the general contractor will occur during the project. Project Schedule A primavera schedule is prepared in this section. This is a more detailed schedule that is built from the previous assignment. This schedule shows the duration of the structural sequence, MEP rough-in, distribution and finishes. Cash Flow From the primavera schedule, each activity is associated with the cost and a cost load schedule is prepared. Cash flow schedules for the owner and the general contractor are created. The “S” curve (Cumulative payments) is shown on the graph.


3

SITE LAYOUT PLANNING Excavation Phase

Elev. = 0 m

Access Road

Dul

les I

nter

natio

nal A

irpor

t

Temp Power

Fence

Trees

Trees

Slope back 45 degrees

Elev. = 15m

ExcavateUtility Lines

ExcavateRetainage

Pond

To

stoc

kpile

WORK PATH WORK PATH

WO

RK

PAT

H

WO

RK

PAT

H WO

RK

PAT

H

WO

RK

PAT

H

ExcavateWater Run-off

Trench

• Equipment used for mass excavation includes: 3 scrapers, 4 Bulldozers, 1 Track hoe, along with 4 dump trucks. • A drainage system along with a retainage pond was constructed for water run-off • In total30,000 Cubic Yards of soil was excavated from the site. • Because of the size of the site, most can be stock piled and used later, although

about 35 percent will need to be trucked away to an adjacent site. •


4

Superstructure Phase

• Site is not very congested, which allows for staging of materials • Site can get muddy, so materials should be elevated • Construction path starts from right to left according to crane paths above • Due to the change in elevation, total of three cranes will be onsite at once

o Two crawler cranes are used in constructing the Main Hangar o One crawler crane is used for the erection of the steel in the Public

Amenities • Steel for Main Hangar is delivered and erected in pieces

o Connections are bolted to save time and allow for adjustments o Two cranes are needed to walk center section into place

• Tower is built in three sections up to 5th Floor o “Egg” on top is erected prior, then lifted by crane into place

Crane Path

`

`

Exec. Parking

Temp. Offices for G.C.

(Approx area)

Water Retainage

Tem

p.O

ffic

es

for S

teel

Sub

(A

ppro

x ar

ea)


(Approx area)

Temp. Offices for Subs

(Approx area)

Concrete truck

Concrete truck

Employee Parking

I-MAX

Spa

ce H

ang

ar

Main Hangar

Central Utility Plant

TowerSite Wall

Crane

Crane

PumpTruck

Steel Staging

Mis

c.St

agin

g

Dul

les I

nter

natio

nal A

irpor

t

Steel Staging

Steel Staging

Crane

Public Amenities

Employee Parking

Exec

. Par

king

Temp Power

GuardGate

Hydrant

Fence

Equipment Path

Equipment Path

Dumpster

Dumpster

Dumpster

Dumpster

Trees

Trees

Equipment Path

Crane PathCrane Path


5

Finish Phase

• Site starts to get congested when site construction begins • Planes are brought in from Dulles on the access road

o Site must be clean for planes to taxi o Parking is limited due to Media

• Tower and Theater finish materials are delivered to floors by crane • Crane is also used for pouring site walls • Staging must be moved when site work progresses

Staging


(Approx area)

Water Retainage

Tem

p.O

ffic

es

for S

teel

Sub

(A

ppro

x ar

ea)


(Approx area)

Temp. Offices for Subs

(Approx area)

Employee Parking

I-MAX

Spac

e H

ang

ar

Main Hangar

Central Utility Plant

TowerSite Wall

Crane

Misc.Steel Staging Public

Amenities

Exec

. Par

king

GuardGate

Hydrant

Fence

Work Path

Work Path

Access Road to Dulles

Dul

les I

nter

natio

nal A

irpor

t

Wor

k Pa

th

MEP Staging

StagingStaging

Dumpster

Dumpster

Dumpster

Dumpster

Trees

Trees


6

TEMPORARY UTILITIES

In order to achieve the best quality work, Architects, general contractors and the subcontractors must pay close attention to the materials handling processes including fabrication, delivery, storage, and installation. On the other hand, a safe environment for workers is also very important. Proper material management is essential for both obtaining the best quality work and providing a safe environment for workers. Under each section of the specifications, it states the requirement for each type of materials. Temporary utilities are described in section 1510 in the specifications. Here, it states the general requirement for each utility including light and power, heat and ventilation, and construction water. Adequate temporary lighting and power are required for the building, the site, and the field offices to serve construction trades during the entire project.

Temporary ventilation is provided for comfort and protection of workers, for proper drying of wet work, and for proper curing of installed materials. Temporary Heat is provided to ensure suitable working conditions, for storage, and also curing of products and materials. These elements are all tied with material management and in the following paragraphs, two specific materials: Cast-in-place concrete and Spray-Applied Fireproofing, are discussed in detail.

Cast-in-place concrete is used throughout the building and site. Cast-in-place

concrete is used in foundations, machine and other equipment bases, as well as concrete slabs and curbs. The quality of concrete is very crucial to the building and the contractor must provide extra care during the mixing and curing process. During mixing, if the concrete is under hot weather or conditions that will accelerate the setting of concrete, a shorter mixing time or admixture to slow the curing process may be required. When air temperature is between 85 to 90 degrees Fahrenheit, the contractor must reduce the mixing and delivery time from 1 ½ hours to 75 minutes. When air temperature is above 97 degrees Fahrenheit, they must reduce the time to 60 minutes.

During curing process, the contractor needs to protect the working area from premature drying, temperature extremes, rain and flowing water. They are required to cure continuously without allowing the concrete to dry. This will prevent hydration of cement and hardening of concrete. They also need to maintain the curing temperature; which is above 50 degrees Fahrenheit. Therefore, in cold weather, they will need to provide temporary heat to maintain the required temperature. In addition, when air temperature is below 40 degrees Fahrenheit or above 80 degrees Fahrenheit, the concrete needs to be tested hourly and a set of compression specimens is made each time.


7

Spray-Applied Fireproofing is required to be handled with care, as described in the manufacturer’s instructions. Before applying the fireproofing, the material must be stored in dry area without any damages. Materials must be used prior to the expiration date. Specific environmental requirements are to ‘maintain an air and substrate temperature of 40 degrees Fahrenheit for 24 hours before, during, and for 24 hours after application; provide temporary enclosures and heat as required.’ For proper curing and thorough drying of fire resistive materials, the general contractor has to ensure natural ventilation is adequate. If it is inadequate, the general contractor must provide forced air circulation. There is no specific requirement on temporary electrical and power for both cast-in-place concrete and applied fireproofing. Therefore, requirements for those are simply followed as described in the temporary utilities sections provided by the contractor.


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DETAILED STRUCTURAL ESTIMATE Structural Take-off Foundations Main Hangar Spread Footings Reinforcement (each way)

Quantity L (mm) W (mm) depth (mm) CY Quantity Size (#) spacing

16 1500 1500 500 24 5 19 300 63 2000 2000 400 132 6 19 333 19 2500 2500 500 78 7 22 357 27 3000 3000 600 191 9 22 333 Caissons

Quantity diameter avg. depth CY Quantity Size (#) spacing

122 1070 4500 645 16 36 210 Mat footings


34 6000 5000 499 666 6 13 833 Caisson Caps

Conc.Quantity L (mm) W (mm) depth (mm) CY

34 6000 5000 2150 2868

SteelQuantity Size (mm) L (mm) Type

204 152 d 5000 pipe 68 500 d 2650 pipe 34 500 d 1650 pipe 102 W310x60 5000 w-shape Central Utility Plant Reinforcement (each way)


4 3000 3000 600 28 9 22 333 8 3500 3500 690 88 9 25 389 10 4000 4000 770 161 12 25 333 5 4500 4500 870 115 12 29 375


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6 5000 5000 920 181 15 29 333 Observation Tower Mat Footing Reinforcement (each way)


1 12000 12000 800 151 40 29 300 Top 40 29 300 Bottom

Imax Theater Spread Footings Reinforcement (each way)


3 1500 1500 500 4 5 19 300 41 1750 1750 610 100 6 22 292 8 2250 2250 760 40 7 25 321 7 3000 3000 965 80 12 25 250 Public Amentities Spread Footings Reinforcement (each way)


2 1750 1750 610 5 6 22 292 4 5000 3000 610 48 20 29 150 Top 20 29 150 Bottom23 2000 2000 400 48 6 19 333 21 2500 2500 500 86 7 22 357 44 3000 3000 600 311 9 22 333 15 3500 3500 690 166 9 25 389

Retaining Wall Reinforcement (Top and

Bottom)

Strip Footing L (mm) W (mm) depth (mm) CY Quantity Size (#) spacing

20 8000 5000 600 628 10 13 500 Long 20 19 400 Short TOTAL CY = 6843 Slab on Grade


10

Theater

Rad. (mm)

Area (m^2)

depth (mm) CY Reinforcement

Theater 20000 1256 125 205.4 6x6/W2.1xW2.1 Steps 208 250 68.02 6x6/W2.1xW2.2

Public Amenities incl. Tower Total SF = 53228

L (mm) W (mm) depth (mm) CY Reinforcement

Area 1 34000 30000 125 167 6x6/W2.1xW2.1 Area 2 63000 24000 125 247 6x6/W2.1xW2.2 Area 2 29500 22000 125 106 6x6/W2.1xW2.2 Area 3 65000 24000 125 255 Area 3 17000 12000 125 33

Main Hangar Total SF = 240035

Area (m^2)


Areas 4-9 22,300 300 8751 # 19 @ 500 Top and Bottom AHU's 4 108 125 71 fiber reinforced concrete Central Utility Plant


Area 10-11 95000 20000 150 372.8 6x6/W2.1xW2.1 TOTAL CY = 10276 Slab on Metal Deck - Level 2 75 mm 20 Guage Galvanized Metal Deck Theater

Area (m^2)


Theater 840 105 115.4 6x6/W2.1xW2.1

Public Amenities incl. Tower Total SF = 53228


Area 1 34000 30000 105 140 6x6/W2.1xW2.1 Area 2 63000 24000 105 208 6x6/W2.1xW2.2 Area 2 29500 22000 105 89 6x6/W2.1xW2.2


11

Area 3 65000 24000 105 214 Area 3 17000 12000 105 28 Main Hangar


Mezzanine - 4 132500 3000 105 55 6x6/W2.1xW2.1 Mezzanine - 5 130000 3000 105 54 6x6/W2.1xW2.1 Mezzanine - 6 79000 3000 105 33 6x6/W2.1xW2.1 Mezzanine - 7 170000 3000 105 70 6x6/W2.1xW2.1 Mezzanine - 8 0 3000 105 0 6x6/W2.1xW2.1 Mezzanine - 9 45000 3000 105 19 6x6/W2.1xW2.1 Central Utility Plant


Area 10-11 95000 20000 105 260.9 6x6/W2.1xW2.1 Cocrete Encased Wall - Tower - Level 2 L (mm) W (mm) Hgt.(mm) CY Reinforcement 51480 360 3000 73 6x6/W2.1xW2.1 Slab on Metal Deck - Level 3 75 mm 20 Guage Galvanized Metal Deck Theater

Area (m^2)


Theater 840 105 115.4 6x6/W2.1xW2.1 Public Amenities incl. Tower


Tower 9000 6000 105 7.416 6x6/W2.1xW2.1 Cocrete Encased Wall - Tower - Level 3 L (mm) W (mm) Hgt.(mm) CY Reinforcement Tower 51480 360 3000 73 6x6/W2.1xW2.1 Slab on Metal Deck -Level 4 75 mm 20 Guage Galvanized Metal Deck Theater


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Area (m^2)


Theater 840 105 115.4 6x6/W2.1xW2.1 Public Amenities incl. Tower


Tower 9000 6000 105 7.416 6x6/W2.1xW2.1 Cocrete Encased Wall - Tower - Level 4 L (mm) W (mm) Hgt.(mm) CY Reinforcement Tower 51480 360 3000 73 6x6/W2.1xW2.1 Slab on Metal Deck -Level 5 75 mm 20 Guage Galvanized Metal Deck Theater

Rad. (mm)

Area (m^2)


Theater 20000 1256 125 205.4 6x6/W2.1xW2.1 Public Amenities incl. Tower


Tower 9000 6000 105 7.416 6x6/W2.1xW2.1 Cocrete Encased Wall - Tower - Level 5 L (mm) W (mm) Hgt.(mm) CY Reinforcement Tower 51480 360 3000 73 6x6/W2.1xW2.1 Slab on Metal Deck -Level 6 75 mm 20 Guage Galvanized Metal Deck Public Amenities incl. Tower


Tower 9000 6000 105 7.416 6x6/W2.1xW2.1 Cocrete Encased Wall - Tower - Level 6 L (mm) W (mm) Hgt.(mm) CY Reinforcement Tower 51480 360 3000 73 6x6/W2.1xW2.1


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Slab on Metal Deck -Level 7 75 mm 20 Guage Galvanized Metal Deck Public Amenities incl. Tower

Rad. (mm)

Area (m^2)


Tower 4500 63.585 115 9.564 6x6/W2.1xW2.1 Cocrete Encased Wall - Tower - Level 7 L (mm) W (mm) Hgt.(mm) CY Reinforcement Tower 51480 360 3000 73 6x6/W2.1xW2.1 Slab on Metal Deck -Level 8 75 mm 20 Guage Galvanized Metal Deck Public Amenities incl. Tower

Rad. (mm)

Area (m^2)


Tower 4500 63.585 115 9.564 6x6/W2.1xW2.1 Cocrete Encased Wall - Tower - Level 8 L (mm) W (mm) Hgt.(mm) CY Reinforcement Tower 51480 360 3000 73 6x6/W2.1xW2.1 TOTAL CY = 2279 TOTAL CY = 19398


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Structural Estimate 1st Floor


15

GENERAL CONDITIONS ESTIMATE


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17

Staffing Plan

Staff Member Project Phase Estimate Start-Up Structural Finishes Close-out Executive Vice President 1 1 Project Estimator 1 1 1 1 Opperations Manager 1 1 1 1 1 1 General Superintendent 1 1 1 1 1 1 1 Project Manager 1 1 1 1 1 1 1 1 Project Superintendent 1 1 1 1 Project Engineer 1 2 3 3 3 2 1 1 Area Superintendent 2 4 3 2 2 Office Engineer 2 3 4 4 4 4 2 2 Field Engineer 5 5 4 3 1 = Staff Member Present 2 = Number of Staff Members


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PROJECT SCHEDULE

** PLEASE REFERENCE LINK FOR PROJECT SCHEDULE


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PROJECT CASH FLOW ** PLEASE REFERENCE LINK FOR CASH FLOW DATA Cash Flow Curve

Cash Flow - NASM

$0$20,000,000$40,000,000$60,000,000$80,000,000

$100,000,000$120,000,000

Apr-01

Jul-0

1

Oct-01

Jan-0

2

Apr-02

Jul-0

2

Oct-02

Jan-0

3

Apr-03

Jul-0

3

Oct-03

Month

Cum

ulat

ive

Rec

ieve

d

Technical Assignment #3 PROJECT DELIVERY …...CRAIG DUBLER Construction Management Option Steven F....

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