UFGS_05_50_13_Miscellaneous_Metal_Fabrications_-_UFGS_05_50_13.pdf

SECTION 05 50 13

MISCELLANEOUS METAL FABRICATIONS

05/10

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 DAF45 (2003; Reaffirmed 2009) Designation System for Aluminum Finishes

AMERICAN INSTITUTE OF STEEL CONSTRUCTION (AISC)

AISC 303 (2016) Code of Standard Practice for Steel Buildings and Bridges

AMERICAN SOCIETY OF CIVIL ENGINEERS (ASCE)

ASCE 7 (2010; Errata 2011; Supp 1 2013) Minimum

Design Loads for Buildings and Other Structures

AMERICAN SOCIETY OF SAFETY ENGINEERS (ASSE/SAFE)

ASSE /SAFE Al0.3 (2013) Operations - Safety Requirements for Powder Actuated Fastening Systems

AMERICAN WELDING SOCIETY (AWS)

AWS Dl .1/Dl.lM (2015; Errata 1 2015; Errata 2 2016)

Structural Welding Code - Steel

ASME INTERNATIONAL (ASME)

ASME B18.2 .1 (2012; Errata 2013) Square and Hex Bolts and Screws (Inch Series)

ASME B18.2 .2 (2010) Nuts for General Applications :

Machine Screw Nuts, Hex, Square, Hex Flange, and Coupling Nuts (Inch Series)

ASME B18.21.1 (2009; R 2016) Washers: Helical

Spring-Lock, Tooth Lock, and Plain Washers (Inch Series)

ASME B18.21.2M (1999; R 2014) Lock Washers (Metric Series)

ASME B18.22M (1981; R 2010) Metric Plain Washers

ASME B18.6.2 (1998; R 2010) Slotted Head Cap Screws, Square Head Set Screws, and Slotted Headless Set Screws: Inch Series

ASME B18.6.3 (2013) Machine Screws, Tapping Screws, and Machine Drive Screws (Inch Series)

ASTM INTERNATIONAL (ASTM)

ASTM A123/A123M (2013) Standard Specification for Zinc

(Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A153/A153M (2016) Standard Specification for Zinc

Coating (Hot-Dip) on Iron and Steel Hardware

ASTM A283/A283M (2013) Standard Specification for Low and

Intermediate Tensile Strength Carbon Steel Plates

ASTM A307 (2014) Standard Specification for Carbon

Steel Bolts and Studs, 60 000 PSI Tensile Strength

ASTM A36/A36M (2014) Standard Specification for Carbon

Structural Steel

ASTM A467/A467M (2007; R 2012) Standard Specification for

Machine Coil Chain

ASTM A47/A47M (1999; R 2014) Standard Specification for

Ferritic Malleable Iron Castings

ASTM A475 (2003; R 2014) Standard Specification for

Zinc-Coated Steel Wire Strand

ASTM A48/A48M (2003; R 2012) Standard Specification for

Gray Iron Castings

ASTM A500/A500M (2013) Standard Specification for

Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes

ASTM A53/A53M (2012) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ASTM A653/A653M (2015; E 2016) Standard Specification for

Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannea led) by the Hot-Dip Process

ASTM A780/A780M (2009; R 2015) Standard Practice for

Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings

ASTM A786/A786M (2015a) Standard Specification for

Hot-Rolled Carbon, Low-Alloy, High-Strength Low-Alloy, and Alloy Steel Floor Plates

ASTM A924/A92 4M (2016a) Standard Specification for General

Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process

ASTM Bl08/Bl08M (2015) Standard Specification for

Aluminum-Alloy Permanent Mold Castings

ASTM B209 (2014) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate

ASTM B209M (2014) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate (Metric)

ASTM B221 (2014) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

ASTM B221M (2013) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes (Metric)

ASTM B26/B26M (2014; E 2015) Standard Specification for

Aluminum-Alloy Sand Castings

ASTM Cl513 (2013) Standard Specification for Steel Tapping Screws for Cold-Formed Steel Framing Connections

ASTM Dll87/Dll87M (1997; E 2011; R 2011) Asphalt-Base

Emulsions for Use as Protective Coatings for Metal

ASTM 02047 (2011) Static Coefficient of Friction of

Polish-Coated Floor Surfaces as Measured by the James Machine

ASTM E488/E488M (2015) Standard Test Methods for Strength of Anchors in Concrete and Masonry Elements

ASTM Fl267 (2015) Metal, Expanded, Steel

MASTER PAINTERS INSTITUTE (MPI)

MPI 79 (Oct 2009) Alkyd Ant i-Corrosive Metal Primer

NATIONAL ASSOCIATION OF ARCHITECTURAL METAL MANUFACTURERS (NAAMM)

NAAMM MBG 531 (2009) Metal Bar Grating Manual

NAAMM MBG 532 (2009) Heavy Duty Metal Bar Grating Manual

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 211 (2016) Standard for Chimneys , Fireplaces, Vents, and Solid Fuel-Burning Appliances

SOCIETY FOR PROTECTIVE COATINGS (SSPC)

SSPC SP 3 (1982; E 2004) Power Tool Cleaning

SSPC SP 6/NACE No .3 (2007) Commercial Blast l .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 33 00, SUBM ITTAL PROCEDURES :

SD-02 Shop Drawings

Access Doors and Panels, Installation Drawings; G

Cover Plates and Frames, 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 installation with relation to the building construction.

SD-03 Product Data

Access Doors and Panels

Cover Plates and Frames

1.3 QUALIFICATION OF WELDERS

Qualify welders in accordance with AWS Dl.l/Dl .lM . Use procedures, materials, and equipment of the type required for the work .

1.4 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 A36/A36M .

2 .1.2 Structural

Tubing ASTM

A500/A500M .

2 .1.3 Steel Pipe

ASTM A53/A53M , Type E or s, Grade B .

2 .1.4 Fittings for Steel Pipe

Standard malleable iron fittings ASTM A47/A47M .

2 .1.5 Gratings

a. Gray cast iron ASTM A48/A48M , Class 40.

b . Metal plank grating, non-slip requirement, aluminum ASTM B209M ASTM B209, 6061-T6; steel ASTM A653/A653M , Z275 G90.

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

2 .1.6 Floor Plates, Patterned

Floor plate ASTM A786/A786M . Steel plate shall not be less than 1.9 mm 14 gage .

2 .1.7 Anchor Bolts

ASTM A307. Where exposed, shall be of the same material, color, and finish as the metal to which applied .

2 .1.7.1 Omitted

2 .1.7.2 Lag Screws and Bolts

ASME B18.2 .1, type and grade best suited for the purpose .

2 .1.7.3 Toggle Bolts

ASME B18.2 .1.

2 .1.7.4 Bolts, Nuts, Studs and Rivets

ASME B18.2 .2 or ASTM A307.

2 .1.7.5 Powder Actuated Fasteners

Follow safety provisions of ASSE /SAFE Al0.3.

2 .1.7.6 Screws

ASME B18.2 .1, ASME B18.6.2, ASME B18.6.3 and ASTM C1513.

2 .1.7.7 Washers

Provide plain washers to conform toASME B18.22M ASME B18.21.1. 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 .1.8 Aluminum Alloy Products

Conform to ASTM B209M ASTM B209 for sheet plate, ASTM B221M ASTM B221 for extrusions and ASTM B2 6/B2 6M or ASTM B108/B108M 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 A123/A123M , ASTM A153/A153M , ASTM A653/A653M or ASTM A92 4/A924M , Z275 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 A780/A780M 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 Shop Cleaning and Painting

2 .2 . 4. 1 Surface Preparation

Blast clean surfaces in accordance with SSPC SP 6/NACE No .3. 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 .2.4.2 Pretreatment, Priming and Painting

Apply pretreatment, primer, and paint in accordance with manufacturer's printed instructions .

2 .2.5 Nonferrous Metal Surfaces

Protect by plating, anodic, or organic coatings.

2 .2.6 Aluminum Surfaces

2 .2.6.l Surface

Condition

Be fore 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 .2.6.2 Aluminum Finishes

Unexposed sheet, plate and extrusions may have mill finish as fabricated

. Sandblast castings' finish, medium, AA DAF45. Unless otherwise specified, provide all other aluminum items with a 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 DAF45. Provide a polished satin finish on items to be anodized.

2 .3 ACCESS DOORS AND PANELS

Provide flush type access doors and pane ls 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 ceiling access panels for terminal air blenders as indicated. Provide pin-tumbler cylinder locks with appropriate cams in lieu of screwdriver-operated latches.

2 .4 OMITTED

2.5 COVER PLATES AND FRAMES

Fabricate cover plates of 1/4 inch thick rolled steel weighing not more than 45 kg 100 pounds per plate with a selected raised pattern nonslip top surface. Plate shall be galvanized. Reinforce to sustain a live load of 100 pounds per square foot. Frames shall be structural steel shapes and plates securely fastened to the structure as indicated .

Miter and weld all corners . Butt joint straight runs. Allow for expansion on straight runs over 15 feet . Provide holes for lifting tools. Remove sharp edges and burrs from cover plates and exposed edges of frames. Weld all connections and grind top surface smooth . Weld bar stops every six inches. Provide 3 mm 1/8 inch clearance at edges and between cover plates .

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 be fore 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 Dl.1/Dl .lM . 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 D1187/D1187M , 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 minus 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.

3.7 ACCESS PANELS

Install a removable access panel not less than 300 by 300 mm 12 by 12 inches directly below each valve, flow indicator, damper, or air splitter that is located above the ceiling, other than an acoustical ceiling, and that would otherwise not be accessible .

3.8 OMITTED

3.9 COVER PLATES AND FRAMES

Install the tops of cover plates and frames flush with floor.