FA3047-10-R-0012 Atch 2T-Division 5

802 CONS/LGCA-3 FA3047-10-R-0012

Lackland AFB TX Roofing IDIQ

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Section J – Attachment 2T Page 1 of 11 8 Feb 2010

SECTION 05 50 13

MISCELLANEOUS METAL FABRICATIONS

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced.

The publications are referred to within the text by the basic designation only.

ALUMINUM ASSOCIATION (AA)

AA 46(1978) Standards for Anodized Architectural Aluminum

AA DAF-45(2003) Designation System for Aluminum Finishes

AMERICAN INSTITUTE OF STEEL CONSTRUCTION (AISC)

AISC 303(2005) Code of Standard Practice for Steel Buildings and Bridges

AMERICAN SOCIETY OF CIVIL ENGINEERS (ASCE)

ASCE 7-05(2006; Errata 2007) Minimum Design Loads for Buildings and Other

Structures

AMERICAN SOCIETY OF SAFETY ENGINEERS (ASSE/SAFE)

ASSE/SAFE A10.3(2006) Operations - Safety Requirements for Powder Actuated

Fastening Systems

AMERICAN WELDING SOCIETY (AWS)

AWS D1.1(2008; Errata 2009) Structural Welding Code - Steel

ASME INTERNATIONAL (ASME)

ASME B18.2.1(1996; Addenda A 1999; Errata 2003; R 2005) Square and Hex Bolts and

Screws (Inch Series)

ASME B18.2.2(1987; R 2005) Standard for Square and Hex Nuts

ASME B18.21.1(1999; R 2005) Lock Washers (Inch Series)

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ASME B18.22.1(1965; R 2008) Plain Washers

ASME B18.6.2(1998; R 2005) Slotted Head Cap Screws, Square Head Set Screws, and

Slotted Headless Set Screws: Inch Series

ASME B18.6.3(2003; R 2008) Machine Screws and Machine Screw Nuts

ASTM INTERNATIONAL (ASTM)

ASTM A 123(2009) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on

Iron and Steel Products

ASTM A 153(2009) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel

Hardware

ASTM A 307(2007b) Standard Specification for Carbon Steel Bolts and Studs, 60 000

PSI Tensile Strength

ASTM A 36(2008) Standard Specification for Carbon Structural Steel

ASTM A 47(1999; R 2004) Standard Specification for Steel Sheet, Aluminum-Coated, by the Hot-Dip Process

ASTM A 500(2007) Standard Specification for Cold-Formed Welded and Seamless

Carbon Steel Structural Tubing in Rounds and Shapes

ASTM A 53(2007) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-

Coated, Welded and Seamless

ASTM A 653(2009) Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or

Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

ASTM A 687(1993) Standard Specification for High-Strength Nonheaded Steel Bolts and

Studs

ASTM A 780(2001; R 2006) Standard Practice for Repair of Damaged and Uncoated

Areas of Hot-Dip Galvanized Coatings

ASTM A 924(2009) Standard Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process

ASTM B 108(2008) Standard Specification for Aluminum-Alloy Permanent Mold

Castings

ASTM B 209(2007) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate

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ASTM B 221(2008) Standard Specification for Aluminum and Aluminum-Alloy

Extruded Bars, Rods, Wire, Profiles, and Tubes

ASTM B 26(2009) Standard Specification for Aluminum-Alloy Sand Castings

ASTM D 1187(1997; R 2002e1) Asphalt-Base Emulsions for Use as Protective Coatings for Metal

MASTER PAINTERS INSTITUTE (MPI)

MPI 79(Jan 2004) Alkyd Anti-Corrosive Metal Primer

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 211(2006) Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are for Contractor Quality Control approval. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Expansion joint covers, installation drawings; G

Roof walkways; GRoof hatch; G

Submit fabrication drawings showing layout(s), connections to structural system, and anchoring details as specified in AISC 303.

Submit templates, erection and installation drawings indicating thickness, type, grade, class of metal, and dimensions. Show construction details, reinforcement, anchorage, and installation with relation to the building construction.

SD-03 Product Data

Expansion joint covers; G

Roof walkways

Roof hatch; G

SD-04 Samples

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Expansion joint covers; G

Provide full size samples, taken from manufacturer's stock, and be complete as required for installation in the structure. Samples may be installed in the work, provided each sample is clearly identified and its location recorded.

Roof Hatch

Provide samples sized to represent material adequately.

SD-11 Closeout Submittals

Roof Hatch Warranty; G

1.3 QUALIFICATION OF WELDERS

Qualify welders in accordance with AWS D1.1. Use procedures, materials, and equipment of the type required for the work.

1.4 Roof Hatch Warranty

Manufacturer's standard warranty: Materials shall be free of defects in material and workmanship for a period of five years from the date of purchase. Should a part fail to function in normal use within this period, manufacturer shall furnish a new part at no charge. Electrical motors, special finishes, and other special equipment (if applicable) shall be warranted separately by the manufacturers of those products.

1.5 DELIVERY, STORAGE, AND PROTECTION

Protect from corrosion, deformation, and other types of damage. Store items in an enclosed area free from contact with soil and weather. Remove and replace damaged items with new items.

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Structural Carbon Steel

ASTM A 36.

2.1.2 Structural Tubing

ASTM A 500.

2.1.3 Steel Pipe

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ASTM A 53, Type E or S, Grade B.

2.1.4 Fittings for Steel Pipe

Standard malleable iron fittings ASTM A 47.

2.1.5 Anchor Bolts

ASTM A 307. Where exposed, shall be of the same material, color, and finish as the metal to which applied.

2.1.5.1 Lag Screws and Bolts

ASME B18.2.1, type and grade best suited for the purpose.

2.1.5.2 Toggle Bolts

ASME B18.2.1.

2.1.5.3 Bolts, Nuts, Studs and Rivets

ASME B18.2.2 and ASTM A 687 or ASTM A 307.

2.1.5.4 Powder Driven Fasteners

Follow safety provisions of ASSE/SAFE A10.3.

2.1.5.5 Screws

ASME B18.2.1, ASME B18.6.2, and ASME B18.6.3.

2.1.5.6 Washers

Provide plain washers to conform to ASME B18.22.1. Provide beveled washers for

American Standard beams and channels, square or rectangular, tapered in thickness, and smooth. Provide lock washers to conform to ASME B18.21.1.

2.1.6 Aluminum Alloy Products

Conform to ASTM B 209 for sheet plate, ASTM B 221 for extrusions and ASTM B 26 or

ASTM B 108 for castings, as applicable. Provide aluminum extrusions at least 1/8 inch thick and aluminum plate or sheet at least 0.050 inch thick.

2.2 FABRICATION FINISHES

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2.2.1 Galvanizing

Hot-dip galvanize items specified to be zinc-coated, after fabrication where practicable.

Galvanizing: ASTM A 123, ASTM A 153, ASTM A 653 or ASTM A 924, G90, as applicable.

2.2.2 Galvanize

Anchor bolts, grating fasteners, washers, and parts or devices necessary for proper installation, unless indicated otherwise.

2.2.3 Repair of Zinc-Coated Surfaces

Repair damaged surfaces with galvanizing repair method and paint conforming to ASTM

A 780 or by application of stick or thick paste material specifically designed for repair of galvanizing, as approved by Contracting Officer. Clean areas to be repaired and remove slag from welds. Heat surfaces to which stick or paste material is applied, with a torch to a temperature sufficient to melt the metallics in stick or paste; spread molten material uniformly over surfaces to be coated and wipe off excess material.

2.2.4 Nonferrous Metal Surfaces

Protect by plating, anodic, or organic coatings.

2.2.5 Aluminum Surfaces

2.2.5.1 Surface Condition

Before finishes are applied, remove roll marks, scratches, rolled-in scratches, kinks, stains, pits, orange peel, die marks, structural streaks, and other defects which will affect uniform appearance of finished surfaces.

2.2.5.2 Aluminum Finishes

Unexposed sheet, plate and extrusions may have mill finish as fabricated. Sandblast castings' finish, medium, AA DAF-45, or AA 46. Unless otherwise specified, provide all other aluminum items with an anodized finish. Provide a coating thickness not less than that specified for protective and decorative type finishes for items used in interior locations or architectural Class I type finish for items used in exterior locations in AA

DAF-45. Provide a polished satin finish on items to be anodized.

2.3 CORNER GUARDS AND SHIELDS

For edges of platforms provide steel shapes and plates anchored in masonry or concrete with welded steel straps or end-weld stud anchors. Corner guards on exterior shall be galvanized.

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2.4 EXPANSION JOINT COVERS

Provide expansion joint covers constructed of extruded aluminum with anodized satin aluminum finish for walls and ceilings and with standard mill finish for floor covers and exterior covers. Furnish plates, backup angles, expansion filler strip and anchors as indicated.

2.5 ROOF HATCH

2.5.1 Size and Type

Where indicated, provide metal roof hatch, size width: 2'6" x length: 4'6". Length denotes hinge side. Verify size when replacing existing roof hatch. The roof hatch shall be single leaf. The roof hatch shall be pre-assembled from the manufacturer.

2.5.2 Performance Characteristics

a. Cover shall be reinforced to support a minimum live load of 40 psf with a maximum deflection of 1/150th of the span or 20 psf wind uplift.

b. Operation of the cover shall be smooth and easy with controlled operation throughout the entire arc of opening and closing.

c. Operation of the cover shall not be affected by temperature.

d. Cover action shall be smooth through its entire range with an operating pressure of approximately 30 pounds.

e. Entire hatch shall be weathertight with fully welded corner joints on cover and curb.

2.5.3 Cover

Cover shall be 11 gauge aluminum with a 3" beaded flange with formed reinforcing members. Cover shall have a heavy extruded EPDM rubber gasket that is bonded to the cover interior to assure a continuous seal when compressed to the top surface of the curb.

2.5.4 Cover Insulation

Cover insulation shall be fiberglass of 1" thickness, fully covered and protected by an 18 gauge aluminum metal liner.

2.5.5 Curb

Curb shall be 12" in height and of 11 gauge aluminum. The curb shall be formed with a

3-1/2" flange with 7/16" holes provided for securing to the roof deck. The curb shall be

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2.5.6 Curb Insulation

Curb insulation shall be rigid, high-density fiberboard of 1" (25.4mm) thickness on outside of curb.

2.5.7 Lifting Mechanisms

Manufacturer shall provide compression spring operators enclosed in telescopic tubes to provide, smooth, easy, and controlled cover operation throughout the entire arc of opening and closing. The upper tube shall be the outer tube to prevent accumulation of moisture, grit, and debris inside the lower tube assembly. The lower tube shall interlock with a flanged support shoe welded to the curb assembly.

2.5.8 Hardware

Provide heavy pintle hinges.

Cover shall be equipped with a spring latch with interior and exterior turn handles.

Roof hatch shall be equipped with interior and exterior padlock hasps.

The latch strike shall be a stamped component bolted to the curb assembly.

Cover shall automatically lock in the open position with a rigid hold open arm equipped with a 1" diameter red vinyl grip handle to permit easy release for closing.

Compression spring tubes shall be an anti-corrosive composite material and all other hardware shall be zinc plated and chromate sealed. Springs shall have an electrocoated acrylic finish for corrosion resistance. For installation in highly corrosive environments or when prolonged exposure to hot water or steam is anticipated, specify Type 316 stainless steel hardware.

Cover hardware shall be bolted into heavy gauge channel reinforcing welded to the underside of the cover and concealed within the insulation space.

2.5.9 Finishes

Factory finish shall be mill finish aluminum.

2.6 ROOF WALKWAYS

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Rooftop walkway: Minimum 2 feet wide, 14 gage, ASTM A 653, G-90, steel with slip resistant surface. Furnish all brackets, connectors and other accessories. Support at minimum 5 foot intervals on hard rubber pads in accordance with manufacturers instructions.

2.7 MISCELLANEOUS PLATES AND SHAPES

Provide for items that do not form a part of the structural steel framework, miscellaneous mountings and frames. Provide with connections and fasteners or welds.

2.8 CHIMNEYS, VENTS, AND SMOKESTACKS

Design and construct chimneys and vents in accordance with NFPA 211. Form chimney connectors of not lighter than 20 gauge galvanized steel. Design and construct stacks to withstand a wind velocity of 90 mile/h in accordance with ASCE 7-05. Construct unlined stacks of black-steel plates not less than 3/16 inch thick conforming to ASTM A

36. Weld seams and joints, except provide an angle flange for connection to the boiler, other equipment, and stack support.

2.9 CLEANOUT DOORS

Provide galvanized cleanout doors with frames, and unless otherwise indicated sized to match flues. Provide a continuous flange and anchors for securing frames into masonry.

The doors shall be smokeproof, hinged, and have fastening devices to hold the door closed.

2.10 DOWNSPOUT BOOTS

Provide 12 gauge G90 downspout boots with receiving bells sized to fit downspouts.

PART 3 EXECUTION

3.1 GENERAL INSTALLATION REQUIREMENTS

Install items at locations indicated, according to manufacturer's instructions. Verify all measurements and take all field measurements necessary before fabrication. Exposed fastenings shall be compatible materials, shall generally match in color and finish, and harmonize with the material to which fastenings are applied. Include materials and parts necessary to complete each item, even though such work is not definitely shown or specified. Poor matching of holes for fasteners shall be cause for rejection. Conceal fastenings where practicable. Thickness of metal and details of assembly and supports shall provide strength and stiffness. Form joints exposed to the weather shall be formed to exclude water. Items listed below require additional procedures.

3.2 WORKMANSHIP

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Provide miscellaneous metalwork that is well formed to shape and size, with sharp lines and angles and true curves. Drilling and punching shall produce clean true lines and surfaces. Provide continuous welding along the entire area of contact except where tack welding is permitted. Do not tack weld exposed connections of work in place and ground smooth. Provide a smooth finish on exposed surfaces of work in place and unless otherwise approved, flush exposed riveting. Mill joints where tight fits are required.

Corner joints shall be coped or mitered, well formed, and in true alignment. Accurately set work to established lines and elevations and securely fastened in place. Install in accordance with manufacturer's installation instructions and approved drawings, cuts, and details.

3.3 ANCHORAGE, FASTENINGS, AND CONNECTIONS

Provide anchorage where necessary for fastening miscellaneous metal items securely in place. Include for anchorage not otherwise specified or indicated slotted inserts, expansion shields, and powder-driven fasteners, when approved for concrete; toggle bolts and through bolts for masonry; machine and carriage bolts for steel; through bolts, lag bolts, and screws for wood. Do not use wood plugs in any material. Provide non-ferrous attachments for non-ferrous metal. Make exposed fastenings of compatible materials, generally matching in color and finish, to which fastenings are applied. Conceal fastenings where practicable.

3.4 BUILT-IN WORK

Form for anchorage metal work built-in with concrete or masonry, or provide with suitable anchoring devices as indicated or as required. Furnish metal work in ample time for securing in place as the work progresses.

3.5 WELDING

Perform welding, welding inspection, and corrective welding, in accordance with AWS

D1.1. Use continuous welds on all exposed connections. Grind visible welds smooth in the finished installation.

3.6 FINISHES

3.6.1 Dissimilar Materials

Where dissimilar metals are in contact, protect surfaces with a coat conforming to MPI

79 to prevent galvanic or corrosive action. Where aluminum is in contact with concrete, plaster, mortar, masonry, wood, or absorptive materials subject to wetting, protect with

ASTM D 1187, asphalt-base emulsion.

3.7 ROOF HATCH (SCUTTLES)

3.7.1 Inspection

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Verify that roof hatch installation will not disrupt other trades. Verify that the substrate is dry, clean, and free of foreign matter. Report and correct defects prior to any installation.

3.7.2 Installation

a. Submit product design drawings for review and approval to the Contracting Officer before fabrication.

b. The installer shall check as-built conditions and verify the manufacturer's roof hatch details for accuracy to fit the application prior to fabrication. The installer shall comply with the roof hatch Manufacturer's installation instructions.

c. The installer shall furnish mechanical fasteners consistent with the roof requirements.

3.8 INSTALLATION OF CHIMNEYS, VENTS, AND SMOKESTACKS

Install chimneys and vents in accordance with NFPA 211. Provide a cleanout opening with a tight-fitting, hinged, cast-iron door and frame at the base of each smokestack.

Provide a top band on stacks for attachment of painter's rigging. Provide roof housing, rain cap, downdraft diverter, fire damper, and other accessories required for a complete installation. Join sections of prefabricated lined stacks with acid-resisting high-temperature cement and steel draw bands. Provide means to prevent accumulation of water in the smokestack.

3.9 INSTALLATION OF DOWNSPOUT BOOTS

Secure downspouts to building through integral lips with appropriate fasteners.

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