13125 Metal Building Systems - · PDF fileSee Wall Sections for detailing of 7 decorative...

City of Lexington Electric Operations Center Complex and Warehouse December 2015

Metal Building Systems - page 1

SECTION 13125 - METAL BUILDING SYSTEMS

PART 1 - GENERAL

RELATED DOCUMENTS

Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

BUILDING DESCRIPTION:

ELECTRIC VEHICLE SHED The Gable Structure is a continuous frame building – non expandable. The primary frames have tapered columns and tapered rafters with simple span sidewall girts that bypass the column line in the enclosed shop portion. The columns shall be designed to support loads without bracing members connected to the wall girts. The roof structure of the shed is cantilevered past the column line in the open parking bays typically five feet on each longitudinal side. There will be no interior columns within the open span An enclosed shop is located at the north end of the metal building that has R19 wall and ceiling insulation. The lower 8 feet of the shop interior is clad with an interior metal liner panel. The metal building is set on uniform height column piers foundations that allow for the concrete ground slab to vary with the elevation of the slighting sloping grade. See Alternate # 3 for omitting Electric Shed structure from Base Bid Work.

WAREHOUSE The Gable Structure is a continuous frame building – non expandable. The primary frames have straight (rather than tapered) columns and tapered rafters with simple span sidewall girts that bypass the columns on the North and West wall elevations above 8’-4” A.F.F.to accommodate the width of the EIFS exterior finish framing. See Wall Sections for detailing of 7 decorative masonry wall projections that require 4” Zee channel furring (provided by the PEMB supplier) at specific points in the exterior metal siding panels faces. The columns shall be designed to support loads without bracing members connected to the wall girts. Provide two 10” tube \steel columns at open building corners that required unexposed bolt connections to their base foundation plates Interior tube columns are utilized to reduce the depth the large span framing rafters, and to facilitate the exterior wall inward turns required for wall recesses needed at the covered dock areas. The roof structure of the Warehouse is cantilevered past the column line creating a roof overhang on all sides. A roof cantilever is used to provide shelter for the tow motor lift entrance to the warehouse on the South side. The metal building has continuous draped exterior wall and roof (R-19) insulation. The lower 12 feet of the warehouse interior wall, and the exterior wall finish of the enclosed office area within the warehouse are clad with a white interior metal liner panel. The exterior brick veneer areas are clad with a galvanized liner panel providing rigid insertion material substrate to secure masonry brick ties into the building wall structure. The metal building is set on uniform height masonry and concrete foundations. This building has indented dock features that are not typical of 4 exterior wall box warehouse enclosures.

SUMMARY



This Section includes the following:

Structural framing. Roof panels. Wall panels and liner panels. Insulation. Building components, as follows:

Louvers by GC and Mechanical sub contractor, vents thru roof by plumbing subcontractor, (flashing by metal building erector) non vented ridge cap, gutters and downspouts.

Accessories and trim.

Related Sections include the following:

Division 3 Section "Cast-in-Place Concrete" for concrete foundations, supported concrete floor systems and anchor-bolt installation.

Division 4 Section "Unit Masonry" for brick masonry exterior walls and load-bearing masonry walls. engineered as part of the metal building package.) Division 7 Sections for Flashing and Sheet Metal products and accessories provided by Metal

building manufacturer. Division 8 Section "HM door and Frames" for door and frames not standard with metal building

system manufacturer. Division 8 Section "Door Hardware" for finish door hardware and keying not standard with metal

building system manufacturer. Division 9 Section "Painting" for shop-applied finishes not standard with metal building system

manufacturer.

DEFINITIONS

Bay Spacing: Dimension between main frames measured normal to frame (at centerline of frame) for interior bays, and dimension from centerline of first interior main frame measured perpendicular to end wall girt the outside face of end-wall girt.

Building Length: Dimension of the building measured perpendicular to main framing from end wall to end wall outside face of girt to outside face of girt.

Building Width: Dimension of the building measured parallel to main framing from sidewall to sidewall outside face of girt to outside face of girt

Clear Span: Distance between supports of beams, girders, or trusses (measured from lowest level of connecting area of a column and a rafter frame, or knee).

Eave Height: Vertical dimension from finished floor to eave (the line along the sidewall formed by intersection of the planes of the roof and wall).

Clear Height under Structure: Vertical dimension from finished floor to lowest point of any part of primary or secondary structure, not including crane supports, located within clear span.



Terminology Standard: Refer to MBMA's "Low Rise Building Systems Manual" for definitions of terms for metal building system construction not otherwise defined in this Section or in referenced standards.

SYSTEM PERFORMANCE REQUIREMENTS

General: Provide a complete, integrated set of mutually dependent components and assemblies that form a metal building system capable of withstanding structural and other loads, thermally induced movement, and exposure to weather without failure or infiltration of water into building interior. Include primary and secondary framing, roof and wall panels, and accessories complying with requirements indicated, including those in this Article.

Metal Building System Design: Of size, spacing, slope, and spans indicated, and as follows:

Primary Frame Type: Provide the following:

Rigid Clear Span: Solid-member center gabled structural-framing system without interior columns for the shed and with interior columns for the Warehouse (Warehouse interior columns must remain in exactly the spacing shown to accommodate the aisle spacing of the rack storage. End-Wall Framing: Manufacturer's standard, for buildings not required to be expandable, as follows:

Provide primary frame, capable of supporting one-half of a bay design load, and end-wall columns. Provide load-bearing end-wall and corner columns, and rafters.

End-Wall Framing: Engineer end walls not to be expandable. Secondary Frame Type: Manufacturer's standard rafters and girts (type as detailed on drawings):

Eave Height: see drawings. Bay Spacing: see drawings. Bay Spacing: see drawings. Roof Slope: 1 inch per 12 inches (1:12). Roof System: Manufacturer's standard lap-standing seam II roof panels with fiberglass insulation in enclosed sections. Exterior Wall System: Manufacturer's reinforced scrim field-assembled fiberglass insulated wall panels. (Exterior paneled wall anchors brick on the lower wall sections and an EIFS veneer on upper band on the North and West Elevations.

Structural Performance: Provide metal building systems capable of withstanding the effects of gravity loads and the following loads and stresses within limits and under conditions indicated:

Engineer metal building systems according to procedures in MBMA's "Low Rise Building Systems Manual" AND IN COMPLIANCE WITH NORTH CAROLINA STATE BUILDING CODE (latest edition).

See structural drawing notes pertaining to metal building foundation design with mechanical platform on Sheet S1-S3 for the warehouse and Sheet S6 for the Vehicle Storage Shed

Building Occupancy: “Business” related support Group ‘U” Utility for the Vehicle shed and Group “S-2” Storage for the Warehouse.



Roof Snow Loads: Include vertical loads induced by the weight of snow, as required by N.C. State Building Code. Allow for unbalanced and drift loads. Wind Loads: Include horizontal loads induced by a basic wind speed as required by N. C. State Building Code. Collateral Loads (minimum 5 lbs./sq. ft.: Include additional dead loads other than the weight of metal building system for permanent items such as sprinklers, mechanical systems, electrical systems, and ceilingsNote and design for weight of the suspended unit heaters and the Large

Ceiling fan in the Warehouse. Big Ass Fan: Torque generated by fan during use is 300 ft.lbs. Thrust generated by the fan is less than 130 lbf.

Load Combinations: Design metal building systems to withstand the most critical effects of load factors and load combinations. Deflection Limits: Engineer assemblies to withstand design loads with deflections no greater than the following:

Purlins and Rafters: Vertical deflection of 1/150 of the span. Girts: Horizontal deflection of 1/600 of the span.(supporting brick or EIFS veneer) Roof Panels: Vertical deflection of 1/150 of the span. Wall Panels: Horizontal deflection of l/600 of the span. (supporting brick or EIFS veneer) Floor joists and beams: floor live load supporting concrete slabs l/360 Lintel beams: Total load l/600

Design secondary framing system to accommodate deflection of primary building structure and construction tolerances, and to maintain clearances at openings.

Seismic Performance: Design and engineer metal building systems capable of withstanding the effects of earthquake motions determined according with the N. C. State Building Code.

Thermal Movements: Provide metal building roof and wall panel systems that allow for thermal movements resulting from the following maximum change (range) in ambient and surface temperatures by preventing buckling, opening of joints, overstressing of components, failure of joint sealants, failure of connections, and other detrimental effects. Base engineering calculation on surface temperatures of materials due to both solar heat gain and nighttime-sky heat loss.

Temperature Change (Range): 120 deg F, ambient; 180 deg F, material surfaces.

Thermal Performance: Provide metal building roof and wall assemblies with the following thermal-resistance values (R-value):

Roof Assemblies: R-19. (with 1” thermal blocks typical at Structure) Wall Assemblies: R-19. (with 1” thermal blocks typical at Structure)

Air Infiltration for Roof Panels: Provide roof panel assemblies with permanent resistance to air leakage through assembly of not more than 0.09 cfm/sq. ft. of fixed roof area when tested according to ASTM E 1680 at a static-air-pressure difference of 4 lbf/sq. ft.

Air Infiltration for Wall Panels: Provide wall panel assemblies with permanent resistance to air leakage through assembly of not more than 0.09 cfm/sq. ft. of fixed wall area when tested according to ASTM E 283 at a static-air-pressure difference of 4 lbf/sq. ft.



Water Penetration for Roof Panels: Provide roof panel assemblies with no water penetration as defined in the test method when tested according to ASTM E 1646 at a minimum differential pressure of 20 percent of inward-acting, wind-load design pressure of not less than 6.24 lbf/sq. ft. and not more than 12 lbf/sq. ft.

Water Penetration for Wall Panels: Provide wall panel assemblies with no water penetration as defined in the test method when tested according to ASTM E 331 at a minimum differential pressure of 20 percent of inward-acting, wind-load design pressure of not less than 6.24 lbf/sq. ft. and not more than 12 lbf/sq. ft.

Wind-Uplift Resistance: Provide roof panel assemblies that meet requirements of UL 580 for the following wind-uplift resistance:

Class 90.

SUBMITTALS

Product Data: Include construction details, material descriptions, dimensions of individual components and profiles, and finishes for each type of the following metal building system components:

Structural-framing system. Roof panels. Wall panels and liners. Insulation. Vapor retarders. Trim and closures. Accessories.

Shop Drawings: For the following metal building system components. Include plans, elevations, sections, details, and attachments to other Work.

For installed components indicated to comply with design loads, include structural analysis data signed and sealed by the qualified professional engineer responsible for their preparation. Anchor-Bolt Plans: Include location, diameter, and projection of anchor bolts required to attach metal building to foundation. Indicate column reactions at each location. Structural-Framing Drawings: Show complete fabrication of primary and secondary framing. Indicate welds and bolted connections, distinguishing between shop and field applications. Include transverse cross-sections. Roof and Wall Panel Layout Drawings: Show layouts of panels on support framing, details of edge conditions, joints, panel profiles, corners, custom profiles, supports, anchorages, trim, flashings, closures, and special details. Distinguish between factory- and field-assembled work. Show Openings as required for the work Accessory Drawings: Include details of the following items, at a scale of not less than 1-1/2 inches per 12 inches (1:10):

Overhead Door reinforced structural heads and channel jambs Gutters. Downspouts.

Samples for Initial Selection: Manufacturer's color charts showing the full range of colors available for each type of the following products with factory-applied color finishes:

Roof panels.



Wall panels. Soffit Panels Wall Panels behind Masonry Veneer Interior liner Panels

Product Certificates: Signed by manufacturers of metal building systems certifying that products furnished comply with requirements.

Letter of Design Certification: Signed and sealed by a qualified professional engineer licensed in the State of North Carolina. Include the following:

Name and location of Project. Order number. Name of manufacturer. Name of Contractor. Building dimensions, including width, length, height, and roof slope. Indicate compliance with AISC standards for hot-rolled steel and AISI standards for cold-rolled steel, including edition dates of each standard. Governing building code and year of edition. Design Loads: Include dead load, roof live load, collateral loads, roof snow load, deflection, wind loads/speeds and exposure, seismic zone or effective peak velocity-related acceleration/peak acceleration, and auxiliary loads (cranes). Load Combinations: Indicate that loads were applied acting simultaneously with concentrated loads, according to governing building code. Building-Use Category: Indicate category of building use and its effect on load importance factors. AISC Certification for Category MB: Include statement that metal building system and components were designed and produced in an AISC-Certified Facility by an AISC-Certified Manufacturer.

Welding Certificates: Copies of certificates for welding procedures and personnel.

Warranties: Special warranties specified in this Section.

QUALITY ASSURANCE

Erector Qualifications: An experienced erector who has specialized in erecting and installing work similar in material, design, and extent to that indicated for this Project and who is acceptable to manufacturer. Minimum experience is 5 years.

Professional Engineer Qualifications: A professional engineer who is legally qualified to practice in jurisdiction where Project is located and who is experienced in providing engineering services of the kind indicated. Engineering services are defined as those performed for installations of metal building systems that are similar to those indicated for this Project in material, design, and extent.

Manufacturer Qualifications: A firm experienced in manufacturing metal building systems similar to those indicated for this Project and with a record of successful in-service performance.

Member of MBMA.



AISC Certification for Category MB: An AISC-Certified Manufacturer that designs and produces metal building systems and components in an AISC-Certified Facility. Engineering Responsibility: Preparation of Shop Drawings, testing program development, test result interpretation, and comprehensive engineering analysis by a qualified professional engineer.

Testing Agency Qualifications: An independent testing agency, acceptable to authorities having jurisdiction, qualified according to ASTM E 329 to conduct the testing indicated, as documented according to ASTM E 548.

Source Limitations: Obtain each type of metal building system component through one source from a single manufacturer.

Product Options: Information on Drawings and in Specifications establishes requirements for system's aesthetic effects and performance characteristics. 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.

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

Welding: Qualify procedures and personnel according to AWS D1.1, "Structural Welding Code--Steel"; and AWS D1.3, "Structural Welding Code--Sheet Steel."

Regulatory Requirements: Fabricate and label structural framing to comply with special inspection requirements at point of fabrication for welding and other connections required by authorities having jurisdiction.

Structural Steel: Comply with AISC S335, "Specification for Structural Steel Buildings--Allowable Stress Design, Plastic Design"; or AISC S342, "Load and Resistance Factor Design Specification for Structural Steel Buildings," for design requirements and allowable stresses.

Cold-Formed Steel: Comply with AISI SG-671, "Specification for the Design of Cold-Formed Steel Structural Members," and AISI SG-911, "Load and Resistance Facet Design Specification for Steel Structural Members," for design requirements and allowable stresses.

DELIVERY, STORAGE, AND HANDLING

Deliver components, sheets, panels, and other manufactured items so as not to be damaged or deformed. Package roof and wall panels for protection during transportation and handling.

Handling: Unload, store, and erect roof and wall panels to prevent bending, warping, twisting, and surface damage.

Stack materials on platforms or pallets, covered with tarpaulins or other suitable weathertight and ventilated covering. Store roof and wall panels to ensure dryness. Do not store panels in contact with other materials that might cause staining, denting, or other surface damage.

PROJECT CONDITIONS



Weather Limitations: Proceed with installation only when weather conditions permit roof and wall panel installation to be performed according to manufacturer's written instructions and warranty requirements.

Field Measurements: Verify metal building system foundations by field measurements before metal building fabrication and indicate measurements on Shop Drawings. Coordinate fabrication schedule with construction progress to avoid delaying the Work.

Established Dimensions for Foundations: Where field measurements cannot be made without delaying the Work, establish foundation dimensions and proceed with fabricating structural framing without field measurements. Coordinate anchor-bolt installation to ensure that actual anchorage dimensions correspond to established dimensions. Established Dimensions for Panels: Where field measurements cannot be made without delaying the Work, either establish framing and opening dimensions and proceed with fabricating roof and wall panels without field measurements, or allow for field-trimming panels. Coordinate roof and wall construction to ensure that actual building dimensions, locations of structural members, and openings correspond to established dimensions.

COORDINATION

Coordinate size and location of concrete foundations and casting of anchor-bolt inserts into foundation walls and footings. Concrete, reinforcement, and formwork requirements are specified in Division 3 Section "Cast-in-Place Concrete."

Coordinate installation of roof curbs, equipment supports, and roof penetrations, which are herein specified.

WARRANTY

General Warranty: Special warranties specified in this Article shall not deprive Owner of other rights Owner may have under other provisions of the Contract Documents and shall be in addition to, and run concurrent with, other warranties made by Contractor under requirements of the Contract Documents.

Watertightness Warranty: 20 years from the date of Substantial completion

Special Warranty on Panels: Written warranty, executed by manufacturer agreeing to repair or replace roof and wall panels that fail in materials or workmanship within specified warranty period.

Warranty Period: Three years from date of Substantial Completion.

Special Warranty on Panel Finishes: Written warranty, signed by manufacturer agreeing to repair finish or replace metal panels that show evidence of deterioration of factory-applied finishes within specified warranty period. Deterioration of finish includes, but is not limited to, color fade, chalking, cracking, peeling, and loss of film integrity.

Warranty Period for Roof Panels: 35 years from date of Substantial Completion. Warranty Period for Wall Panels: 35 years from date of Substantial Completion.

PRODUCTS



MANUFACTURERS

Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

A&S Building System American Buildings Company. Butler Manufacturing Company. Ceco Building Systems. Chief Building Systems Inland Buiilding Systems. Nucor - Kirby Building Systems Nucor Building Systems- Gulf States Star Building Systems Varco-Pruden Buildings; a United Dominion Company.

STRUCTURAL-FRAMING MATERIALS

Structural-Steel Shapes: ASTM A 36/A 36M or ASTM A 572/A 572M. Grade 55

Steel Plate, Bar, or Strip: ASTM A 529/A 529M, ASTM A 570/A 570M, or ASTM A 572/A 572M; grade 55, 50,000-psi minimum yield strength.

Structural-Steel Sheet: Hot-rolled, ASTM A 570/A 570M, Grade 50 or Grade 55; hot-rolled, ASTM 568/A 568M; or cold-rolled, ASTM A 611, structural-quality, matte (dull) finish.

Zinc-Coated (Galvanized) Steel Sheet: ASTM A 653/A 653M, structural quality, Grade 80, with G90 coating designation; mill phosphatized. Minimum yield strength shall be 80,000 psi

Metallic-Coated Steel Sheet Prepainted with Coil Coating: Steel sheet metallic coated by the hot-dip process and prepainted by the coil-coating process to comply with ASTM A 755/A 755M and the following requirements:

Zinc-Coated (Galvanized) Steel Sheet: ASTM A 653/A 653M, G90 coating designation; structural quality. Grade 80. Minimum yield strength shall be 80,000 psi

Non-High-Strength Bolts, Nuts, and Washers: ASTM A 307, Grade A; carbon-steel, hex-head bolts; carbon-steel nuts; and flat, unhardened steel washers.

Finish: Mechanically deposited zinc coating, ASTM B 695, Class 50.

High-Strength Bolts, Nuts, and Washers: ASTM A 325, Type 1, heavy hex steel structural bolts, heavy hex carbon-steel nuts, and hardened carbon-steel washers.

Finish: Mechanically deposited zinc coating, ASTM B 695, Class 50.

Anchor Rods, Bolts, Nuts, and Washers: As follows:

Unheaded Rods: ASTM A 36/A 36M or ASTM A 572/A 572M, Grade 50.



Unheaded Bolts: ASTM A 687, high strength. Headed Bolts: ASTM A 307, Grade A; carbon-steel, hex-head bolts; and carbon-steel nuts or ASTM A 325, Type 1, heavy hex steel structural bolts and heavy hex carbon-steel nuts. Washers: ASTM A 36/A 36M.

Primers: As selected by manufacturer for resistance to normal atmospheric corrosion, compatibility with finish paint systems, capability to provide a sound foundation for field-applied topcoats despite prolonged exposure, and as follows:

Primer: Manufacturer's standard, lead- and chromate-free, nonasphaltic, rust-inhibiting primer.

PANEL MATERIALS

Metallic-Coated Steel Sheet Prepainted with Coil Coating: Steel sheet metallic coated by the hot-dip process and prepainted by the coil-coating process to comply with ASTM A 755/A 755M and the following requirements:

Zinc-Coated (Galvanized) Steel Sheet: ASTM A 653/A 653M, G90 coating designation; structural quality. Surface: Smooth, flat, mill finish.

The basis for design that shall establish minimum quality standards for the design and structural quality of the metal building panels are as follows by American Building Company except as noted. Equal products by the other listed metal building companies are acceptable if they meet the intent of the specifications as judged by the architect.

Roof panels:

Roof panels shall be equal to American Building’s Standing Seam II Panel (S2P) or Standing Seam 360 panel (S3P), 22 gage, 80,000 psi , G90 zinc coated galvanized AZ50 aluminum –zinc alloy coated steel finished with Premium 70 (70% Kynar 500) coating to reflect the sun’s rays with a 35 year finish warranty.

Exterior Wall Panels Liner behind brick or EIFS veneer:

Concealed Wall panels behind brick veneer or EIFS shall be equal to American Building’s Long Span III (L3P) minimum 24 gage , 80,000 psi, G90 zinc coated galvanized AZ50 aluminum-zinc alloy coated steel. Engineer of record to calculate pull-out strength needed for brick veneer support.

Exposed Wall Panels : Wall Panels shall be equal to American Buildings Architectural “V” Rib (AVP) 26 gage, 80,000 psi, G-90 zinc coated galvanized AZ 50 aluminum-zinc coated steel with Premium 70% minimum Kynar 500, 35 year warranted exterior finish.

Interior Liner Panels : (Enclosed Electric Shed Shop and Warehouse interior liners )

Provide Long Span Panel Profile (PLP26) by American Building Company. Panel shall be 26 gage G90 zinc coated (galvanized) steel with reflective “White” Longlife coated finish.. Panels length shall be a single length capable of covering from Finish Floor up to the top of the girt at 8’-0” at the



shed, 12’ in the Warehouse and at height as required for the office area with in the building . Provide base shoe and top edge trim to terminate liner panel at floor and upper edge.

See also matching unrolled prefinished break metal trim with drip edges where transitioning from wall panels to brick veneer as indicated on the Architectural Wall Sections.

Note also the use of white liner panels for the exterior cladding of the Office area walls in the Warehouse.

Note the use of 2 to 3” wide sections of metal wall liner panels for use as pressure plates to hold the thru-wall flashing against the ribbed profile liner panel. Fabricate and provide this continuous flashing at a thru wall flashing points continuously around the building perimeter. Note some Wall Section types have more than one line of thru wall flashing (at windows and louver openings). Flashing strips shall be cleaned of metal burs that would cut flashing material. See thru wall flashing schematic on the plans.

Exposed Soffit Panel under roof overhang perimeters.

Provide AMS Soffit Liner panels by American Metal Systems or equal panels consisting of 1” interlocking ribs. The interlocking ribs are designed to conceal panel fasteners. The panel provides a net coverage of 12”with two ribs. Soffit panels are 24 gage, 50,000 psi G90 zinc coated (galvanized) or AZ50 aluminum-zinc alloy coated steel. Provide 25 year finish warranty on galvanized finish.

Panel Sealants: Provide the following:

Sealant Tape: Pressure-sensitive, 100 percent solids, gray polyisobutylene compound sealant tape with release-paper backing. Provide permanently elastic, nonsag, nontoxic, nonstaining tape 1/2 inch wide and 1/8 inch thick. Joint Sealant: ASTM C 920; one-part elastomeric polyurethane, polysulfide, or silicone-rubber sealant; of type, grade, class, and use classifications required to seal joints in panels and remain weathertight; and as recommended by metal building system manufacturer that meet or exceed Federal Specification TT-s-00230C, Type II, Class A.. Metal closures: The corrugations and pan area of the Standing Seam II or Standing seam 360 roof panel shall be filled with formed metal closures. The closures shall be formed of 20 gage steel to the shape of the configuration. The closure exterior finish shall be AZ55 aluminum-zinc alloy coated.

INSULATION MATERIALS

Fire-Test-Response Characteristics for Insulation: Provide insulation and related materials with the fire-test-response characteristics indicated, as determined by testing identical products per test method indicated below by UL or another testing and inspecting agency acceptable to authorities having jurisdiction. Identify materials with appropriate markings of applicable testing and inspecting agency.

Surface-Burning Characteristics: ASTM E 84. Combustion Characteristics: ASTM E 136.



Glass-Fiber-Blanket Insulation: Thermal insulation, complying with ASTM C 991, Type II, or NAIMA 202-96, of 0.5-lb/cu. ft. density, thickness as indicated, with a flame-spread rating of 25 or less, and 2-inch- wide, continuous, vapor-tight edge tabs.

Where exposed to view Provide Laminated R19 for both roof and wall installations that consist of a Gymguard Faced Microlite “L” Formaldehyde Free Fiberglass insulation bearing UL label with a 25/50 FHC rating in accordance with ASTM E 84.

Vapor-Retarder Facing:

Composition: Fiberglass shall be as outlined in the North American Insulation Manufacturing Association (NAIMA 202-96) specification, or equal, with an R-value of 19 when not compressed. The fiberglass shall be faced with white Lamtec Gymguard, as specified below, on one side. The composite of fiberglass and facing shall have surface burning characteristics not to exceed 25 flame spread and 50 smoke developed when tested in accordance with Underwriters Laboratories 723 test method or ASTM E 84 test method.

Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

Gymguard Faced Microlite “L”, by Johns Manville Owens-Corning Fiberglas Corporation. Or approved equals

Retainer Strips: 0.019-inch- thick, formed, galvanized steel or PVC retainer clips colored to match insulation facing.

Rigid foam Thermal Blocks shall be cut from high density extruded polystyrene board stock, having a UL 25 flame spread rating. Thermal Blocks shall have a minimum thickness of 1” and shall be a minimum of 3”in width. Thermal block material shall be Dow Styrofoam (blue Board) or equal.

MISCELLANEOUS MATERIALS

Bituminous Coating: Cold-applied asphalt mastic, SSPC-Paint 12, compounded for 15-mil dry film thickness per coat. Provide inert-type noncorrosive compound free of asbestos fibers, sulfur components, and other deleterious impurities.

Nonmetallic, Shrinkage-Resistant Grout: Premixed, nonmetallic, noncorrosive, nonstaining grout containing selected silica sands, portland cement, shrinkage compensating agents, plasticizing and water-reducing agents, complying with ASTM C 1107, of consistency suitable for application, and with a 30-minute working time.

Shop Primer for Galvanized Metal Surfaces: Zinc dust, zinc-oxide primer selected by manufacturer for compatibility with substrate. Comply with FS TT-P-641.

Finish Painting: Refer to Division 9 Section "Painting."

FABRICATION, GENERAL



General: Design components and field connections required for erection to permit easy assembly and disassembly.

Fabricate components in a manner that once assembled in the shop, they may be disassembled, repackaged, and reassembled in the field. Mark each piece and part of the assembly to correspond with previously prepared erection drawings, diagrams, and instruction manuals. Fabricate framing to produce clean, smooth cuts and bends. Punch holes of proper size, shape, and location. Cold-formed members shall be free of cracks, tears, and ruptures.

Primary Framing: Shop-fabricate framing components to indicated size and section with baseplates, bearing plates, stiffeners, and other items required for erection welded into place. Cut, form, punch, drill, and weld framing for bolted field assembly.

Make shop connections by welding or by using high-strength bolts. Join flanges to webs of built-up members by a continuous submerged arc-welding process. Brace compression flange of primary framing by angles connected between frame web and purlin or girt web, so flange compressive strength is within allowable limits for any combination of loadings. Weld clips to frames for attaching secondary framing members. Shop Priming: Prepare surfaces for shop priming according to SSPC-SP 2. Shop prime primary structural members with specified primer after fabrication.

Secondary Framing: Shop-fabricate framing components to indicated size and section by roll-forming or break-forming, with baseplates, bearing plates, stiffeners, and other plates required for erection welded into place. Cut, form, punch, drill, and weld secondary framing for bolted field connections to primary framing.

Make shop connections by welding or by using non-high-strength bolts. Shop Priming: Prepare surfaces for shop priming according to SSPC-SP 2. Shop prime secondary structural members with specified primer after fabrication.

Factory Priming for Field-Painted Finish: Field painting after installation applies. Provide air-dried primer immediately after cleaning and pretreating.

Prime primary, secondary, and end-wall steel framing members with specified primer to a minimum dry film thickness of 1 mil.

STRUCTURAL FRAMING

Primary Framing: Manufacturer's standard structural primary framing system, designed to withstand required loads and specified requirements. Primary framing includes transverse and lean-to frames; rafter, rake, and canopy beams; sidewall, intermediate, end-wall, and corner columns; and wind bracing.

General: Provide frames with attachment plates, bearing plates, and splice members. Factory drill for field-bolted assembly. Provide frame span and spacing indicated.

Rigid Clear-Span Frames: I-shaped frame sections fabricated from shop-welded, built-up steel plates or structural-steel shapes. Frame Configuration: Single gable (ALT #2 gas shed) and Single slope (Alt #3Public works shed). Exterior Column Type: Uniform depth or tapered. (Provide straight columns at Warehouse) Rafter Type: Uniform depth or tapered.



Note: Columns shall be designed to free standing without requiring bracing to wall girts.

End-Wall Framing: Manufacturer's standard primary end-wall framing fabricated for field-bolted assembly to comply with the following:

End-Wall and Corner Columns: I-shaped sections fabricated from structural-steel shapes; shop-welded, built-up steel plates; or C-shaped, cold-formed, structural-steel sheet; with minimum thickness of 0.0747 inch.

See requirement for 2 steel tube columns on the south side of the Warehouse Building.

Secondary Framing: Manufacturer's standard secondary framing members, including purlins, girts, eave struts, flange bracing, base members, gable angles, clips, headers, jambs, and other miscellaneous structural members. Fabricate framing from cold-formed, structural-steel sheet or roll-formed, metallic-coated steel sheet prepainted with coil coating, unless otherwise indicated, to comply with the following:

Purlins: C- or Z-shaped sections; fabricated from minimum 0.0598-inch- thick steel sheet, built-up steel plates, or structural-steel shapes; minimum 2-1/2-inch- wide flanges.

Depth: As required by design or as indicated on drawings (whichever is greater).

Girts: C- or Z-shaped sections; fabricated from minimum 0.0598-inch- thick steel sheet, built-up steel plates, or structural-steel shapes. Form ends of Z-sections with stiffening lips angled 45 to 50 degrees to flange and with minimum 2-1/2-inch- wide flanges.

Depth: As required by design or as indicated on drawings (whichever is greater).

Wall Girt Spacing: Note spacing on Architectural Wall Sections indicating the spacing of girts that are required for brick veneer back-up and other special features. Note also that Girts span inset between columns at different places in the exterior walls.

Eave Struts: Unequal-flange, C-shaped sections; fabricated from 0.0598-inch- thick steel sheet, built-up steel plates, or structural-steel shapes; to provide adequate backup for both roof and wall panels. Flange and Sag Bracing: Minimum 1-5/8-by-1-5/8-inch structural-steel angles, with a minimum thickness of 0.0598 inch, to stiffen primary frame flanges. Base or Sill Angles: Minimum 3-by-2-by-0.0747-inch zinc-coated (galvanized) steel sheet. Purlin and Girt Clips: Minimum 0.0747-inch- thick, zinc-coated (galvanized) steel sheet. Secondary End-Wall Framing: Manufacturer's standard sections fabricated from minimum 0.0747-inch- thick, zinc-coated (galvanized) steel sheet. Framing for Openings: Channel shapes; fabricated from minimum 0.0598-inch- thick, cold-formed, structural-steel sheet or structural-steel shapes. Frame head and jamb of door openings, and head, jamb, and sill of other openings. Miscellaneous Structural Members: Manufacturer's standard sections fabricated from cold-formed, structural-steel sheet; built-up steel plates; or zinc-coated (galvanized) steel sheet; designed to withstand required loads.

Bracing: Provide adjustable wind bracing as follows: (Note Wind bracing rods not permitted in open bays of vehicle parking areas.



Rods: ASTM A 36/A 36M; ASTM A 572/A 572M, Grade D; or ASTM A 529/A 529M, Grade 50; 1/2-inch- diameter steel; threaded full length or threaded a minimum of 12 inches at each end. Pinned -Base Columns: Fabricate from shop-welded, built-up steel plates or structural-steel shapes to match primary framing; of size required to withstand design loads. Bracing: Provide wind bracing using any method specified above that does not conflict with free and clear building usage under shed space, at manufacturer's option.

Bolts: Provide shop-painted bolts unless structural-framing components are in direct contact with roof and wall panels. Provide zinc-plated bolts when structural-framing components are in direct contact with roof and wall panels.

ACCESSORIES

General: Provide accessories as standard with metal building system manufacturer, and complying with the following:

Provide sheet metal accessories of same material and in same finish as roof and wall panels, unless otherwise indicated.

Fasteners: Self-tapping screws, bolts, nuts, self-locking rivets and bolts, end-welded studs, and other suitable fasteners designed to withstand design loads. Provide fasteners with heads matching color of roof or wall sheets by means of plastic caps or factory-applied coating. Comply with the following:

Fasteners for Roof and Wall Panels: Self-drilling or self-tapping 410 stainless or zinc-alloy steel hex washer head, with EPDM or PVC washer under heads of fasteners bearing on weather side of panels. Fasteners for Flashing and Trim: Blind fasteners or self-drilling screws with hex washer head. Blind Fasteners: High-strength aluminum or stainless-steel rivets.

Flashing and Trim: Form from 0.0179-inch-thick, zinc-coated (galvanized) steel sheet or aluminum-zinc alloy-coated steel sheet prepainted with coil coating. Provide flashing and trim as required to seal against weather and to provide finished appearance. Locations include, but are not limited to, eaves, rakes, corners, bases, framed openings, ridges, fasciae, and fillers. Finish flashing and trim with same finish system as adjacent roof or wall panels.

Opening Trim: Minimum 0.028-inch- thick steel sheet. Trim head and jamb of door openings, and head, jamb, and sill of other openings.

Gutters: Form from 0.0239-inch- thick, (24 gage) prefinished 70% kynar on zinc-coated (galvanized) steel sheet or aluminum-zinc alloy-coated steel sheet prepainted with coil coating. Provide expansion joints in gutter per SMACNA requirements. Fabricate gutter in maximum length sections. . Match profile of gable trim, complete with end pieces, outlet tubes, and other special pieces as required. Fabricate in minimum 144-inch-long sections, sized according to SMACNA's "Architectural Sheet Metal Manual." Furnish gutter supports spaced 24 inches o.c., fabricated from same metal as gutters. Provide bronze, copper, or aluminum wire ball strainers at outlets. Finish gutters to match roof fascia and rake trim.

Downspouts: Form from 0.0239 -inch- thick, (24 guage) zinc-coated (galvanized) steel sheet or aluminum-zinc alloy-coated steel sheet prepainted with coil coating; in 14-foot- long sections, complete with formed elbows and offsets. Finish downspouts to match wall panels.



Louvers: Provided by Mechanical Subcontractor. Metal Building supplier to provide framed panel openings for louvers size and design as indicated on the drawings.Closures: Closed-cell, laminated polyethylene; minimum 1-inch- thick, flexible closure strips; cut or premolded to match roof and wall panel profile. Provide closure strips where indicated or necessary to ensure weathertight construction.

FINISHES, GENERAL

Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal Products" for recommendations for applying and designating finishes.

Appearance of Finished Work: Variations in appearance of abutting or adjacent pieces are acceptable if they are within one-half of the range of approved Samples. Noticeable variations in the same piece are not acceptable. Variations in appearance of other components are acceptable if they are within the range of approved Samples and are assembled or installed to minimize contrast.

EXECUTION

EXAMINATION

Examine substrates, with Erector present, for compliance with requirements for installation tolerances and other conditions affecting performance of metal building system.

Proceed with erection only after unsatisfactory conditions have been corrected.

Before erection proceeds, survey elevations and locations of concrete and masonry bearing surfaces, baseplates, and anchor bolts to receive structural framing. Verify compliance with requirements and metal building system manufacturer's tolerances.

PREPARATION

Clean substrates of substances, including oil, grease, rolling compounds, incompatible primers, and loose mill scale, that impair bond of erection materials.

Surface Preparation: Clean and prepare surfaces to be painted according to manufacturer's written instructions for each particular substrate condition and as specified.

ERECTION

Erect metal building system according to manufacturer's written instructions and erection drawings.

Do not field cut, drill, or alter structural members without written approval from metal building system manufacturer's professional engineer.

Set structural framing in locations and to elevations indicated and according to AISC specifications referenced in this Section. Maintain structural stability of frame during erection.



Baseplates and Bearing Plates: Clean concrete and masonry bearing surfaces of bond-reducing materials and roughen surfaces before setting baseplates and bearing plates. Clean bottom surface of baseplates and bearing plates.

Set baseplates and bearing plates for structural members on wedges, shims, or setting nuts. Tighten anchor bolts after supported members have been positioned and plumbed. Do not remove wedges or shims but, if protruding, cut off flush with edge of baseplate or bearing plate before packing with grout. Pack grout solidly between bearing surfaces and plates so no voids remain. Finish exposed surfaces, protect installed materials, and allow to cure.

Comply with manufacturer's written instructions for proprietary grout materials.

Align and adjust framing members before permanently fastening. Before assembly, clean bearing surfaces and other surfaces that will be in permanent contact. Make adjustments to compensate for discrepancies in elevations and alignment.

Level and plumb individual members of structure. Establish required leveling and plumbing measurements on mean operating temperature of structure.

Primary Framing and End Walls: Erect framing true to line, level, plumb, rigid, and secure. Level baseplates to a true even plane with full bearing to supporting structures, set with double-nutted anchor bolts. Use grout to obtain uniform bearing and to maintain a level base-line elevation. Moist cure grout for not less than seven days after placement.

Make field connections using high-strength bolts. Tighten bolts by turn-of-the-nut method.

Secondary Framing: Erect framing true to line, level, plumb, rigid, and secure. Fasten secondary framing to primary framing using clips with field connections using non-high-strength bolts. Hold rigidly to a straight line by sag rods.

Provide rake or gable purlins with tight-fitting closure channels and fasciae. Locate and space wall girts to suit door and window arrangements and heights. Locate canopy framing as indicated. Provide supplemental framing at entire perimeter of openings, including doors, windows, louvers, ventilators, and other penetrations of roof and walls.

Bracing: Install bracing in roof and sidewalls where indicated on erection drawings.

Tighten rod and cable bracing to avoid sag. Locate interior end bay bracing only where indicated.

Framing for Openings: Provide shapes of proper design and size to reinforce openings and to carry loads and vibrations imposed, including equipment furnished under mechanical and electrical work. Securely attach to building structural frame.

ROOF PANEL INSTALLATION

General: Provide roof panels of full length from eave to ridge . Install panels perpendicular to purlins.



Field cutting by torch is not permitted. Rigidly fasten eave end of roof panels and allow ridge end free movement due to thermal expansion and contraction. Predrill panels. Provide weatherseal under ridge cap. Flash and seal roof panels with weather closures at eaves, rakes, and at perimeter of all openings. Fasten with self-tapping screws. Install screw fasteners with power tools having controlled torque adjusted to compress neoprene washer tightly without damage to washer, screw threads, or panels. Install screws in predrilled holes. Use painted stainless-steel fasteners for exterior applications and galvanized fasteners for interior applications. Locate and space fastenings in true vertical and horizontal alignment. Install ridge caps as roof panel work proceeds. Avoid splicing panel lengths.

Standing-Seam Roof Panels: Fasten roof panels to purlins with concealed floating clip fasteners at each lapped joint at location and spacing determined by manufacturer.

Provide full length roof panels without splicing. (at Vehicle Storage Building) Provide no more than two panels at the Warehouse Building)

Arrange and nest side-lap joints so prevailing winds blow over, not into, lapped joints. Lap ribbed or fluted sheets one full rib corrugation. Apply panels and associated items for neat and weathertight enclosure. Avoid "panel creep" or application not true to line. Locate and space concealed fasteners in true vertical and horizontal alignment. Provide sealant tape at lapped joints of roof panels and between panels and protruding equipment, vents, and accessories. Apply a continuous ribbon of sealant tape to weather-side surface of fastenings on end laps, and on side laps of nesting-type panels. At panel splices, nest panels with minimum 6-inch end lap, sealed with butyl sealant and fastened together by interlocking clamping plates.

WALL PANEL INSTALLATION

General: Provide panels full height of building. Install panels perpendicular to girts.

Arrange and nest side-lap joints so prevailing winds blow over, not into, lapped joints. Install panels with vertical edges plumb. Lap ribbed or fluted sheets one full rib corrugation. Apply panels and associated items for neat and weathertight enclosure. Avoid "panel creep" or application not true to line. Unless otherwise indicated, begin panel installation at corners with center of rib lined up with line of framing. Field cutting by torch is not permitted. Align bottom of wall panels and fasten with blind rivets, bolts, or self-tapping screws. Fasten flashing and trim around openings and similar elements with self-tapping screws. Install screw fasteners with power tools having controlled torque adjusted to compress neoprene washer tightly without damage to washer, screw threads, or panels. Install screws in predrilled holes. Provide weather-resistant escutcheons for pipe and conduit penetrating exterior walls. Flash and seal wall panels with weather closures under eaves and rakes, along lower panel edges, and at perimeter of all openings.



Apply elastomeric sealant continuously between metal base channel (sill angle) and concrete, and elsewhere as necessary for waterproofing. Handle and apply sealant and backup according to sealant manufacturer's written instructions. Use aluminum or stainless-steel fasteners for exterior applications and galvanized fasteners for interior applications. Locate and space fastenings in true vertical and horizontal alignment. Spacings of fasteners around building perimeter must be uniform, identical and symmetrical pattern

Uninsulated Panels: Install wall panels on exterior side of girts. Attach panels to supports with fasteners as recommended by manufacturer.

INSULATION INSTALLATION

General: Install insulation concurrently with panel installation, according to manufacturer's written instructions and as follows:

Set vapor-retarder-faced units with vapor retarder to warm side of construction, unless otherwise indicated. Do not obstruct ventilation spaces, except for firestopping. Tape joints and ruptures in vapor retarder, and seal each continuous area of insulation to surrounding construction to ensure airtight installation.

Blanket Insulation: Install factory-laminated, vapor-retarder-faced blankets straight and true in one-piece lengths with both sets of facing tabs sealed to provide a complete vapor retarder. Comply with the following installation method:

Over-Framing Installation: Extend insulation and vapor retarder over and perpendicular to top flange of secondary framing members. Hold in place by panels fastened to secondary framing.

DOOR INSTALLATION: Personnel Doors and hardware by others. Metal Building manufacturer to provide back-up framing and wall bracing for anchoring all personnel doors and Over head doors to the structure.

ACCESSORY INSTALLATION

General: Install gutters, downspouts, ventilators, louvers, and other accessories according to manufacturer's written instructions, with positive anchorage to building and weathertight mounting. Coordinate installation with flashings and other components.

Flashing and Trim: Comply with performance requirements, manufacturer's written installation instructions, and SMACNA's "Architectural Sheet Metal Manual." Provide for thermal expansion of metal units; conceal fasteners where possible, and set units true to line and level as indicated. Install work with laps, joints, and seams that will be permanently watertight and weather resistant.

Install exposed flashing and trim that is without excessive oil canning, buckling, and tool marks and that is true to line and levels indicated, with exposed edges folded back to form hems. Install sheet metal flashing and trim to fit substrates and to result in waterproof and weather-resistant performance. Expansion Provisions: Provide for thermal expansion of exposed flashing and trim. Space movement joints at a maximum of 10 feet with no joints allowed within 24 inches of corner or



intersection. Where lapped or bayonet-type expansion provisions cannot be used or would not be sufficiently weather resistant and waterproof, form expansion joints of intermeshing hooked flanges, not less than 1 inch deep, filled with mastic sealant (concealed within joints). Separations: Separate metal from incompatible metal or corrosive substrates by coating concealed surfaces, at locations of contact, with asphalt mastic or other permanent separation as recommended by manufacturer.

Gutters: Join sections with riveted and soldered or lapped and sealed joints. Attach gutters to eave with gutter hangers spaced not more than 2 feet o.c. using manufacturer's standard fasteners. Provide end closures and seal watertight with sealant. Provide for thermal expansion. Downspouts: Join sections with 1-1/2-inch telescoping joints. Provide fasteners designed to hold downspouts securely 1 inch away from walls; locate fasteners at top and bottom and at approximately 60 inches o.c. in between.

Tie downspouts to underground drainage system where indicated.

ERECTION AND LOCATION TOLERANCES

Structural-Steel Erection Tolerances: Comply with erection tolerance limits of AISC S303, "Code of Standard Practice for Steel Buildings and Bridges."

Roof Panel Installation Tolerances: Shim and align units within installed tolerance of 1/4 inch in 20 feet on slope and location lines as indicated and within 1/8-inch offset of adjoining faces and of alignment of matching profiles.

Wall Panel Installation Tolerances: Shim and align units within installed tolerance of 1/4 inch in 20 feet on level, plumb, and location lines as indicated and within 1/8-inch offset of adjoining faces and of alignment of matching profiles.

FIELD QUALITY CONTROL

Bolted connections will be visually inspected. High-strength, field-bolted connections will be tested and verified according to procedures in RCSC's "Load and Resistance Factor Design Specification for Structural Joints Using ASTM A 325 or A 490 Bolts."

Schedule “Special Inspections” Testing in accordance with Chapter 14 of the North Carolina Building Code. Make all corrections indicated by the testing agency reports within 10 days of notification.

Testing will be paid for by the Owner using the “Testing Allowance” indicated in the specifications.

Testing agency will report test results promptly and in writing to Contractor and Architect.

CLEANING AND PROTECTION

Touchup Painting: Immediately after erection, clean, prepare, and prime or reprime welds, bolted connections, and abraded surfaces of prime-painted primary and secondary framing, accessories, and bearing plates.

Apply compatible primer of same type as shop primer used on adjacent surfaces.



Repair damaged galvanized coatings on exposed surfaces with galvanized repair paint according to ASTM A 780 and manufacturer's written instructions.

Roof and Wall Panels: Remove temporary protective coverings and strippable films, if any, as soon as each panel is installed. On completion of panel installation, clean finished surfaces as recommended by panel manufacturer and maintain in a clean condition during construction.

Replace panels that have been damaged or have deteriorated beyond successful repair by finish touchup or similar minor repair procedures.

END OF SECTION 13125

13125 Metal Building Systems - · PDF fileSee Wall Sections for detailing of 7 decorative...

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