1、09-11 05 50 00- 1 SECTION 05 50 00 METAL FABRICATIONS SPEC WRITER NOTE: 1. Delete between /_/ if not applicable to project. Also delete any other item or paragraph not applicable in the section and renumber the paragraphs. 2. Use terminology as listed and coordinate drawings to use the same term. 3.
2、 This section includes custom fabricated items. 4. List additional items required by the project. 5. VA standard details numbers are identified in list in parenthesis following each item; delete numbers from project specification. PART 1 - GENERAL 1.1 DESCRIPTION A. This section specifies items and
3、assemblies fabricated from structural steel shapes and other materials as shown and specified. B. Items specified. 1. Support for Wall and Ceiling Mounted Items: (12, 14A, 14C) 2. Frames: (24E) 3. Guards 4. Covers and Frames for Pits and Trenches. 5. Gratings 6. Loose Lintels 7. Shelf Angles 8. Gas
4、Racks 9. Plate Door Sill 10. Safety Nosings 11. Ladders 12. Railings: (10) 13. Catwalks and Platforms 14. Trap Doors with Ceiling Hatch 15. Sidewalk Access Doors 16. Screened Access Doors 17. Steel Counter or Bench Top Frame and Leg 1.2 RELATED WORK A. Railings attached to steel stairs: Section 05 5
5、1 00, METAL STAIRS. B. Colors, finishes, and textures: Section 09 06 00, SCHEDULE FOR FINISHES. C. Prime and finish painting: Section 09 91 00, PAINTING. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 05 50 00- 2 D. Stainless steel corner guar
6、ds: Section 10 26 00, WALL AND DOOR PROTECTION. 1.3 SUBMITTALS A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES. B. Manufacturers Literature and Data: Grating, each type Floor plate Trap door Wheel guards Ceiling hatch Sidewalk Access door Manhole Covers Safety
7、 nosing C. Shop Drawings: 1. Each item specified, showing complete detail, location in the project, material and size of components, method of joining various components and assemblies, finish, and location, size and type of anchors. 2. Mark items requiring field assembly for erection identification
8、 and furnish erection drawings and instructions. 3. Provide templates and rough-in measurements as required. D. Manufacturers Certificates: 1. Anodized finish as specified. 2. Live load designs as specified. E. Design Calculations for specified live loads including dead loads. F. Furnish setting dra
9、wings and instructions for installation of anchors to be preset into concrete and masonry work, and for the positioning of items having anchors to be built into concrete or masonry construction. 1.4 QUALITY ASSURANCE A. Each manufactured product shall meet, as a minimum, the requirements specified,
10、and shall be a standard commercial product of a manufacturer regularly presently manufacturing items of type specified. B. Each product type shall be the same and be made by the same manufacturer. C. Assembled product to the greatest extent possible before delivery to the site. D. Include additional
11、 features, which are not specifically prohibited by this specification, but which are a part of the manufacturers standard commercial product. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 05 50 00- 3 1.5 APPLICABLE PUBLICATIONS A. The public
12、ations listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only. B. American Society of Mechanical Engineers (ASME): B18.6.1-97 . Wood Screws B18.2.2-87(R2005) Square and Hex Nuts C. American Society for Testin
13、g and Materials (ASTM): A36/A36M-08 Structural Steel A47-99(R2009) Malleable Iron Castings A48-03(R2008) Gray Iron Castings A53-10 . Pipe, Steel, Black and Hot-Dipped, Zinc-Coated Welded and Seamless A123-09 Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products A167-99(R2009) . Stainless and
14、 Heat-Resisting Chromium-Nickel Steel Plate, Sheet and Strip A269-10 Seamless and Welded Austenitic Stainless Steel Tubing for General Service A307-10 Carbon Steel Bolts and Studs, 60,000 PSI Tensile Strength A312/A312M-09 Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes A3
15、91/A391M-07 Grade 80 Alloy Steel Chain A653/A653M-10 Steel Sheet, Zinc Coated (Galvanized) or Zinc-Iron Alloy Coated (Galvannealed) by the Hot-Dip Process A786/A786M-09 Rolled Steel Floor Plate B221-08 Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Shapes, and Tubes B456-03(R2009) . Electrod
16、eposited Coatings of Copper Plus Nickel Plus Chromium and Nickel Plus Chromium B632-08 Aluminum-Alloy Rolled Tread Plate C1107-08 . Packaged Dry, Hydraulic-Cement Grout (Nonshrink) D3656-07 . Insect Screening and Louver Cloth Woven from Vinyl-Coated Glass Yarns F436-10 Hardened Steel Washers F468-10
17、 Nonferrous Bolts, Hex Cap Screws, and Studs for General Use F593-02(R2008) . Stainless Steel Bolts, Hex Cap Screws, and Studs F1667-11 . Driven Fasteners: Nails, Spikes and Staples Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 05 50 00- 4 D.
18、 American Welding Society (AWS): D1.1-10 Structural Welding Code Steel D1.2-08 Structural Welding Code Aluminum D1.3-08 Structural Welding Code Sheet Steel E. National Association of Architectural Metal Manufacturers (NAAMM) AMP 521-01 . Pipe Railing Manual AMP 500-06 . Metal Finishes Manual MBG 531
19、-09 . Metal Bar Grating Manual MBG 532-09 . Heavy Duty Metal Bar Grating Manual F. Structural Steel Painting Council (SSPC)/Society of Protective Coatings: SP 1-04 No. 1, Solvent Cleaning SP 2-04 No. 2, Hand Tool Cleaning SP 3-04 No. 3, Power Tool Cleaning G. Federal Specifications (Fed. Spec): RR-T
20、-650E Treads, Metallic and Nonmetallic, Nonskid PART 2 - PRODUCTS SPEC WRITER NOTE: 1. Update materials requirements to agree with applicable requirements (types, grades, classes,) specified in the referenced Applicable Publications. 2. Coordinate with structural design criteria and specify live loa
21、ds where fork lift and other vehicles will subject plates, gratings and trap doors in floors or pavements to concentrated loads. 2.1 DESIGN CRITERIA A. In addition to the dead loads, design fabrications to support the following live loads unless otherwise specified. B. Ladders and Rungs: 120 kg (250
22、 pounds) at any point. C. Railings and Handrails: 900 N (200 pounds) in any direction at any point. D. Floor Plates, Gratings, Covers, Trap Doors, Catwalks, and Platforms: 500 kg/m2 (100 pounds per square foot). Use _ kg (pounds) for concentrated loads. Use _ kg/m2 (pounds per square foot) for vehic
23、le loads in the following areas : _. E. Manhole Covers: 1200 kg/m2 (250 pounds per square foot). 2.2 MATERIALS A. Structural Steel: ASTM A36. B. Stainless Steel: ASTM A167, Type 302 or 304. C. Aluminum, Extruded: ASTM B221, Alloy 6063-T5 unless otherwise specified. For structural shapes use alloy 60
24、61-T6 and alloy 6061-T4511. D. Floor Plate: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 05 50 00- 5 1. Steel ASTM A786. 2. Aluminum: ASTM B632. E. Steel Pipe: ASTM A53. 1. Galvanized for exterior locations. 2. Type S, Grade A unless specifi
25、ed otherwise. 3. NPS (inside diameter) as shown. F. Cast-Iron: ASTM A48, Class 30, commercial pattern. G. Malleable Iron Castings: A47. H. Primer Paint: As specified in Section 09 91 00, PAINTING. I. Stainless Steel Tubing: ASTM A269, type 302 or 304. J. Modular Channel Units: 1. Factory fabricated,
26、 channel shaped, cold formed sheet steel shapes, complete with fittings bolts and nuts required for assembly. 2. Form channel with in turned pyramid shaped clamping ridges on each side. 3. Provide case hardened steel nuts with serrated grooves in the top edges designed to be inserted in the channel
27、at any point and be given a quarter turn so as to engage the channel clamping ridges. Provide each nut with a spring designed to hold the nut in place. 4. Factory finish channels and parts with oven baked primer when exposed to view. Channels fabricated of ASTM A525, G90 galvanized steel may have pr
28、imer omitted in concealed locations. Finish screws and nuts with zinc coating. 5. Fabricate snap-in closure plates to fit and close exposed channel openings of not more than 0.3 mm (0.0125 inch) thick stainless steel. K. Grout: ASTM C1107, pourable type. L. Insect Screening: ASTM D3656. 2.3 HARDWARE
29、 A. Rough Hardware: 1. Furnish rough hardware with a standard plating, applied after punching, forming and assembly of parts; galvanized, cadmium plated, or zinc-coated by electro-galvanizing process. Galvanized G-90 where specified. 2. Use G90 galvanized coating on ferrous metal for exterior work u
30、nless non-ferrous metal or stainless is used. B. Fasteners: 1. Bolts with Nuts: a. ASME B18.2.2. b. ASTM A307 for 415 MPa (60,000 psi) tensile strength bolts. c. ASTM F468 for nonferrous bolts. d. ASTM F593 for stainless steel. Provided by IHSNot for ResaleNo reproduction or networking permitted wit
31、hout license from IHS-,-,-09-11 05 50 00- 6 2. Screws: ASME B18.6.1. 3. Washers: ASTM F436, type to suit material and anchorage. 4. Nails: ASTM F1667, Type I, style 6 or 14 for finish work. 2.4 FABRICATION GENERAL A. Material 1. Use material as specified. Use material of commercial quality and suita
32、ble for intended purpose for material that is not named or its standard of quality not specified. 2. Use material free of defects which could affect the appearance or service ability of the finished product. B. Size: 1. Size and thickness of members as shown. 2. When size and thickness is not specif
33、ied or shown for an individual part, use size and thickness not less than that used for the same component on similar standard commercial items or in accordance with established shop methods. C. Connections 1. Except as otherwise specified, connections may be made by welding, riveting or bolting. 2.
34、 Field riveting will not be approved. 3. Design size, number and placement of fasteners, to develop a joint strength of not less than the design value. 4. Holes, for rivets and bolts: Accurately punched or drilled and burrs removed. 5. Size and shape welds to develop the full design strength of the
35、parts connected by welds and to transmit imposed stresses without permanent deformation or failure when subject to service loadings. 6. Use Rivets and bolts of material selected to prevent corrosion (electrolysis) at bimetallic contacts. Plated or coated material will not be approved. 7. Use stainle
36、ss steel connectors for removable members machine screws or bolts. D. Fasteners and Anchors 1. Use methods for fastening or anchoring metal fabrications to building construction as shown or specified. 2. Where fasteners and anchors are not shown, design the type, size, location and spacing to resist
37、 the loads imposed without deformation of the members or causing failure of the anchor or fastener, and suit the sequence of installation. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 05 50 00- 7 3. Use material and finish of the fasteners c
38、ompatible with the kinds of materials which are fastened together and their location in the finished work. 4. Fasteners for securing metal fabrications to new construction only, may be by use of threaded or wedge type inserts or by anchors for welding to the metal fabrication for installation before
39、 the concrete is placed or as masonry is laid. 5. Fasteners for securing metal fabrication to existing construction or new construction may be expansion bolts, toggle bolts, power actuated drive pins, welding, self drilling and tapping screws or bolts. E. Workmanship 1. General: a. Fabricate items t
40、o design shown. b. Furnish members in longest lengths commercially available within the limits shown and specified. c. Fabricate straight, true, free from warp and twist, and where applicable square and in same plane. d. Provide holes, sinkages and reinforcement shown and required for fasteners and
41、anchorage items. e. Provide openings, cut-outs, and tapped holes for attachment and clearances required for work of other trades. f. Prepare members for the installation and fitting of hardware. g. Cut openings in gratings and floor plates for the passage of ducts, sumps, pipes, conduits and similar
42、 items. Provide reinforcement to support cut edges. h. Fabricate surfaces and edges free from sharp edges, burrs and projections which may cause injury. 2. Welding: a. Weld in accordance with AWS. b. Welds shall show good fusion, be free from cracks and porosity and accomplish secure and rigid joint
43、s in proper alignment. c. Where exposed in the finished work, continuous weld for the full length of the members joined and have depressed areas filled and protruding welds finished smooth and flush with adjacent surfaces. d. Finish welded joints to match finish of adjacent surface. 3. Joining: a. M
44、iter or butt members at corners. b. Where frames members are butted at corners, cut leg of frame member perpendicular to surface, as required for clearance. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 05 50 00- 8 4. Anchors: a. Where metal
45、fabrications are shown to be preset in concrete, weld 32 x 3 mm (1-1/4 by 1/8 inch) steel strap anchors, 150 mm (6 inches) long with 25 mm (one inch) hooked end, to back of member at 600 mm (2 feet) on center, unless otherwise shown. b. Where metal fabrications are shown to be built into masonry use
46、 32 x 3 mm (1-1/4 by 1/8 inch) steel strap anchors, 250 mm (10 inches) long with 50 mm (2 inch) hooked end, welded to back of member at 600 mm (2 feet) on center, unless otherwise shown. 5. Cutting and Fitting: a. Accurately cut, machine and fit joints, corners, copes, and miters. b. Fit removable m
47、embers to be easily removed. c. Design and construct field connections in the most practical place for appearance and ease of installation. d. Fit pieces together as required. e. Fabricate connections for ease of assembly and disassembly without use of special tools. f. Joints firm when assembled. g
48、. Conceal joining, fitting and welding on exposed work as far as practical. h. Do not show rivets and screws prominently on the exposed face. i. The fit of components and the alignment of holes shall eliminate the need to modify component or to use exceptional force in the assembly of item and elimi
49、nate the need to use other than common tools. SPEC WRITER NOTE: If more than one finish is used on project, specify applicable finish under the item. Coordinate paragraphs to delete finishes not used. F. Finish: 1. Finish exposed surfaces in accordance with NAAMM Metal Finishes Manual. 2. Aluminum: NAAMM AMP 501. a. Mill finish, AA-M10, as fabricated, use unle
