05 50 13 Misc Metal Fabrications.pdf

KRSM 072115 Catwalks to Overhead HVAC, Building 238 Hill AFB, Utah

MISCELLANEOUS METAL FABRICATIONS 05 50 13 - 1

SECTION TABLE OF CONTENTS

DIVISION 05 - METALS

SECTION 05 50 13

MISCELLANEOUS METAL FABRICATIONS

08/08

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

1.3 DELIVERY, STORAGE, AND PROTECTION

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Structural Carbon Steel

2.1.2 Structural Tubing

2.1.3 Steel Pipe

2.1.4 Fittings for Steel Pipe

2.1.5 Gratings

2.1.6 Anchor Bolts

2.1.6.1 Lag Screws and Bolts

2.1.6.2 Toggle Bolts

2.1.6.3 Bolts, Nuts, Studs and Rivets

2.1.6.4 Powder Driven Fasteners

2.1.6.5 Screws

2.1.6.6 Washers

2.1.7 Aluminum Alloy Products

2.2 FABRICATION FINISHES

2.2.1 Galvanizing

2.2.2 Galvanize

2.2.3 Repair of Zinc-Coated Surfaces

2.2.4 Shop Cleaning and Painting

2.2.4.1 Surface Preparation

2.2.4.2 Pretreatment, Priming and Painting

2.2.5 Nonferrous Metal Surfaces

2.2.6 Aluminum Surfaces

2.2.6.1 Surface Condition

2.2.6.2 Aluminum Finishes

2.3 ACCESS DOORS AND PANELS

2.4 FLOOR GRATINGS

2.5 MISCELLANEOUS PLATES AND SHAPES

PART 3 EXECUTION

3.1 GENERAL INSTALLATION REQUIREMENTS

3.2 WORKMANSHIP

3.3 ANCHORAGE, FASTENINGS, AND CONNECTIONS

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3.4 BUILT-IN WORK

3.5 WELDING

3.6 FINISHES

3.6.1 Dissimilar Materials

3.6.2 Field Preparation

3.6.3 Environmental Conditions

MISCELLANEOUS METAL FABRICATIONS 05 50 13 - 3

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/D1.1M (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) ASME B18.21.2M (1999; R 2005) Lock Washers (Metric Series) ASME B18.22.1 (1965; R 2008) Plain Washers ASME B18.22M (1981; R 2005) Metric 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/A 123M (2008) Standard Specification for Zinc (Hot-Dip Galvanized)

Coatings on Iron and Steel Products ASTM A 153/A 153M (2005) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware ASTM A 283/A 283M (2003; R 2007) Standard Specification for Low and Intermediate

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

000 PSI Tensile Strength ASTM A 36/A 36M (2008) Standard Specification for Carbon Structural Steel ASTM A 467/A 467M (2007) Standard Specification for Machine Coil and Chain ASTM A 47/A 47M (1999; R 2004) Standard Specification for Steel Sheet, Aluminum-

Coated, by the Hot-Dip Process ASTM A 475 (2003) Standard Specification for Zinc-Coated Steel Wire Strand ASTM A 48/A 48M (2003; R 2008) Standard Specification for Gray Iron Castings ASTM A 500/A 500M (2007) Standard Specification for Cold-Formed Welded and Seamless

Carbon Steel Structural Tubing in Rounds and Shapes ASTM A 53/A 53M (2007) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

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ASTM A 653/A 653M (2008) 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 786/A 786M (2005) Standard Specification for Hot-Rolled Carbon, Low-Alloy, High-Strength Low-Alloy, and Alloy Steel Floor Plates

ASTM A 924/A 924M (2008a) Standard Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process

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

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

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

ASTM B 221 (2008) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

ASTM B 221M (2007) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes (Metric)

ASTM B 26/B 26M (2005) Standard Specification for Aluminum-Alloy Sand Castings ASTM D 1187 (1997; R 2002e1) Asphalt-Base Emulsions for Use as Protective

Coatings for Metal ASTM E 488 (1996; R 2003) Standard Test Methods for Strength of Anchors in

Concrete and Masonry Elements ASTM F 1267 (2007) Metal, Expanded, Steel ASTM F 1679 (2004e1) Standard Test Method for Using a Variable Incidence

Tribometer

MASTER PAINTERS INSTITUTE (MPI)

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

NATIONAL ASSOCIATION OF ARCHITECTURAL METAL MANUFACTURERS (NAAMM)

NAAMM MBG 531 (2000) Metal Bar Grating Manual NAAMM MBG 532 (2000) Heavy Duty Metal Bar Grating Manual

THE SOCIETY FOR PROTECTIVE COATINGS (SSPC)

SSPC SP 3 (2004; E 2004) Power Tool Cleaning SSPC SP 6 (2007) Commercial Blast Cleaning

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 00 00.

SD-02 Shop Drawings Access doors and panels, installation drawings; G Floor gratings, installation drawings; 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 installationwith relation to the building construction.

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SD-03 Product Data

Access doors and panels Floor gratings walkways

1.3 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/A 36M.

2.1.2 Structural Tubing. ASTM A 500/A 500M.

2.1.3 Steel Pipe. ASTM A 53/A 53M, Type E or S, Grade B.

2.1.4 Fittings for Steel Pipe. Standard malleable iron fittings ASTM A 47/A 47M.

2.1.5 Gratings

a. Gray cast iron ASTM A 48/A 48M, Class 40.

b. Metal plank grating, non-slip requirement, aluminum ASTM B 209M ASTM B

209, 6061-T6; steel ASTM A 653/A 653M, Z275 G90.

c. Metal bar type grating NAAMM MBG 531[NAAMM MBG 532].

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

2.1.6.1 Lag Screws and Bolts. ASME B18.2.1, type and grade best suited for the purpose.

2.1.6.2 Toggle Bolts ASME B18.2.1.

2.1.6.3 Bolts, Nuts, Studs and Rivets ASME B18.2.2 and ASTM A 687 or ASTM A

307.

2.1.6.4 Powder Driven Fasteners. Follow safety provisions of ASSE/SAFE A10.3.

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

2.1.6.6 Washers Provide plain washers to conform toASME B18.22M 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 B18.21.2M ASME B18.21.1.

2.1.7 Aluminum Alloy Products Conform to ASTM B 209M ASTM B 209 for sheet plate, ASTM B 221M ASTM B 221 for extrusions and ASTM B 26/B 26M or ASTM B 108/B 108M for castings, as applicable. Provide aluminum extrusions at least 3 mm 1/8 inch thick and aluminum plate or sheet at least 1.3 mm 0.050 inch thick.

2.2 FABRICATION FINISHES

2.2.1 Galvanizing. Hot-dip galvanize items specified to be zinc-coated, after fabrication where practicable. Galvanizing: ASTM A 123/A 123M, ASTM A 153/A 153M, ASTM A 653/A 653M or ASTM A 924/A 924M, Z275 G90, as applicable.Galvanize anchor bolts, grating fasteners, washers, and parts or devices necessary for proper installation, unless indicated otherwise.

2.2.2 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.

2.2.3 Shop Cleaning and Painting

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2.2.3.1 Surface Preparation. Blast clean surfaces in accordance with SSPC SP 6.

Surfaces that will be exposed in spaces above ceiling or in attic spaces, crawl spaces, furred spaces, and chases may be cleaned in accordance with SSPC SP 3 in lieu of being blast cleaned. Wash cleaned surfaces which become contaminated with rust, dirt, oil, grease, or other contaminants with solvents until thoroughly clean. Steel to be embedded in concrete shall be free of dirt and grease. Do not paint or galvanize bearing surfaces, including contact surfaces within slip critical joints, but coat with rust preventative applied in the shop.

2.2.3.2 Pretreatment, Priming and Painting. Apply pretreatment, primer, and paint in accordance with manufacturer's printed instructions. On surfaces concealed in the finished construction or not accessible for finish painting, apply an additional prime coat to a minimum dry film thickness of 0.03 mm 1.0 mil. Tint additional prime coat with a small amount of tinting pigment.

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 a standard mill 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 om items to be anodized.

2.3 ACCESS DOORS AND PANELS

Provide flush type access doors and panels unless otherwise indicated. Fabricate frames for access doors of steel not lighter than 1.9 mm 14 gage with welded joints and anchorage for securing into construction. Provide access doors with a minimum of 350 by 500 mm 14 by 20 inches and of not lighter than 1.9 mm 14 gage steel, with stiffened edges and welded attachments. Provide access doors hinged to frame and with a flush-face, turn-screw-operated latch. Provide exposed metal surface with a baked enamel finish.

2.4 FLOOR GRATINGS

Design steel grating in accordance with NAAMM MBG 531 for bar type grating or manufacturer's charts for plank grating.

a. Design floor gratings to support a stress live load of 40 pounds per square foot for the spans indicated, with maximum deflection of L/240.

b. NAAMM MBG 531, band edges of grating with bars of the same size as the bearing bars. Weld banding in accordance with the manufacturer's standard for trim. Design tops of bearing bars, cross or intermediate bars to be in the same plane and match grating finish.]

c. Attach gratings to structural members with welded-on anchors or anchor gratings to structural members with bolts, toggle bolts, or expansion shields and bolts.

d. Slip resistance requirements must exceed both wet and dry a static coefficient of friction of 0.5 as tested in accordance with ASTM F 1679.

2.5 MISCELLANEOUS PLATES AND SHAPES

Provide for items that do not form a part of the structural steel framework, such as lintels, sill angles, miscellaneous mountings and frames. Provide lintels fabricated from structural steel shapes over openings in masonry walls and partitions as indicated and as required to support wall loads over openings. Provide with connections and fasteners.

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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

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/D1.1M. 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.

3.6.2 Field Preparation Remove rust preventive coating just prior to field erection, using a remover approved by the rust preventive manufacturer. Surfaces, when assembled, shall be free of rust, grease, dirt and other foreign matter.

3.6.3 Environmental Conditions. Do not clean or paint surface when damp or exposed to foggy or rainy weather, when metallic surface temperature is less than -15 degrees C 5 degrees F above the dew point of the surrounding air, or when surface temperature is below 7 degrees C or over 35 degrees C 45 degrees F or over 95 degrees F, unless approved by the Contracting Officer.

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