VA 05 31 00-2008 STEEL DECKING.pdf

1、11-08M 05 31 00 - 1 SECTION 05 31 00 STEEL DECKING SPEC WRITER NOTE: Delete between / - / if not applicable to project. Also delete any other item or paragraph not applicable in the section and renumber the paragraphs. PART 1 - GENERAL 1.1 DESCRIPTION: This section specifies material and services re

2、quired for installation of steel decking as shown and specified. 1.2 RELATED WORK: A. Materials testing and inspection during construction: Section 01 45 29, TESTING LABORATORY SERVICES. B. Finish Painting: Section 09 91 00, PAINTING. 1.3 DESIGN REQUIREMENTS: A. Design steel decking in accordance wi

3、th AISI publication, “Specification for the Design of Cold-formed Steel Structural Members“ except as otherwise shown or specified. B. Design all elements with the latest published version of applicable codes. 1.4 SUBMITTALS: A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA

4、, AND SAMPLES. B. Shop Drawings: Shop and erection drawings showing decking unit layout, connections to supporting members, and similar information necessary for completing installation as shown and specified, including supplementary framing, sump pans, ridge and valley plates, cant strips, cut open

5、ings, special jointing or other accessories. Show welding, side lap, closure, deck reinforcing and closure reinforcing details. Show openings required for work of other trades, including openings not shown on structural drawings. Indicate where temporary shoring is required to satisfy design criteri

6、a. C. Manufacturers Literature and Data: Showing steel decking section properties and specifying structural characteristics. D. Certification: For each type and gauge of metal deck supporting concrete slab or fill, furnish certification of the specified fire ratings. Certify that the units supplied

7、are U.L. listed as a “Steel Floor and Form Unit”. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-11-08M 05 31 00 - 2 SPEC WRITER NOTE: Retain below for Factory Mutual Insurance requirement or similar form by others. E. Insurance Certification: Assis

8、t the Government in preparation and submittal of roof installation acceptance certification as may be necessary in connection with fire and extended coverage insurance. 1.5 QUALITY ASSURANCE: SPEC WRITER NOTE: Delete below when UL listed floor deck units not required. Review required ratings with Ar

9、chitect. Confirm locations for ratings and where deck will need spray applied fireproofing. A. Underwriters Label: Provide metal floor deck units listed in Underwriters Laboratories “Fire Resistance Directory”, with each deck unit bearing the UL label and marking for specific system detailed. SPEC W

10、RITER NOTE: Delete below if FM compliance not required for roof deck. Coordinate with “Insurance Certification” above. B. FM Listing: Provide metal roof deck units which have been evaluated by Factory Mutual Global and are listed in “Factory Mutual Research Approval Guide” for “Class 1” fire rated c

11、onstruction. 1.6 APPLICABLE PUBLICATIONS: A. Publications listed below form a part of this specification to extent referenced. Publications are referenced in text by basic designation only. B. American Society for Testing and Materials (ASTM): A36/A36M-08 Standard Specification for Carbon Structural

12、 Steel A611-97 Standard Specification for Structural Steel (SS), Sheet, Carbon, Cold-Rolled A653/A653M-08 Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvanized) by the Hot-Dip Process C423-08 Standard Test Method for Sound Absorption and Sound Absorpt

13、ion Coefficients by the Reverberation Room Method C. American Institute of Steel Construction (AISC): 1. Specification for Structural Steel Buildings Allowable Stress Design and Plastic Design (ninth Edition, 1989) 2. Load and Resistance Factor Design Specification for Structural Steel Buildings (La

14、test Edition) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-11-08M 05 31 00 - 3 D. American Iron and Steel Institute (AISI): 1. Specification and Commentary for the Design of Cold-Formed Steel Structural Members E. American Welding Society (AWS): D

15、1.3-08 Structural Welding Code - Sheet Steel F. Factory Mutual (FM Global): 1. Loss Prevention Data Sheet 1-28: Wind Loads to Roof Systems and Roof Deck Securement 2. Factory Mutual Research Approval Guide (2002) G. Military Specifications (Mil. Spec.) MIL-P-21035B. Paint, High Zinc Dust Content, Ga

16、lvanizing Repair PART 2 - PRODUCTS SPEC WRITER NOTE: Use ASTM A653 when galvanizing is desired, A611 when shop painting is desired (permitted only when deck is used for centering only). For galvanized treatment use coating class G60 for normal conditions and G90 for extreme exposure (salt air, etc.)

17、 2.1 MATERIALS: A. Steel Decking: / ASTM A653, Structural Quality / or / ASTM A611, Grade C, D, or E /. B. Galvanizing: ASTM A653, / G90 / G60 /. C. Galvanizing Repair Paint: Mil. Spec. MIL-P-21035B. D. Primer for Shop Painted Sheets: Manufacturers standard primer (2 coats). When finish painting of

18、steel decking is specified in Section 09 91 00, PAINTING primer coating shall be compatible with specified finish painting. E. Miscellaneous Steel Shapes: ASTM A36. F. Welding Electrode: E60XX minimum. G. Sheet Metal Accessories: ASTM A653, galvanized, unless noted otherwise. Provide accessories of

19、every kind required to complete the installation of metal decking in the system shown. Finish sheet metal items to match deck including, but not limited to, the following items: 1. Metal Cover Plates: For end-abutting deck units, to close gaps at changes in deck direction, columns, walls and opening

20、s. Same quality as deck units but not less than 1.3 mm (18 gauge) sheet steel. 2. Continuous Sheet Metal Edging: At openings, concrete slab edges and roof deck edges. Same quality as deck units but not less than 1.3 mm (18 gauge) steel. Side and end closures supporting concrete and their attachment

21、to supporting steel shall be designed by the manufacturer Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-11-08M 05 31 00 - 4 to safely support the wet weight of concrete and construction loads. The deflection of cantilever closures shall be limited

22、to 3 mm (1/8 inch) maximum. 3. Metal Closure Strips: For openings between decking and other construction, of not less than 1.3 mm (18 gauge) sheet steel of the same quality as the deck units. Form to the configuration required to provide tight-fitting closures at open ends of flutes and sides of dec

23、king. 4. Ridge and Valley Plates: Provide 1.3 mm (18 gauge), minimum 100 mm (4 inch) wide ridge and valley plates where roof slope exceeds 40 mm per meter (1/2 inch per foot). 5. Cant Strips: Provide bent metal 45 degree leg cant strips where indicated on the Drawings. Fabricate cant strips from 1 m

24、m (20 gauge) metal with a minimum 125 mm (5 inch) face width. 6. Seat Angles for Deck: Provide where a beam does not frame into a column. 7. Sump Pans for Roof Drains: Fabricated from single piece of minimum 1.9 mm (14 gauge) galvanized sheet steel with level bottoms and sloping sides to direct wate

25、r flow to drain, unless otherwise shown. Provide sump pans of adequate size to receive roof drains and with bearing flanges not less than 75 mm (3 inches) wide. Recess pans not less than 38 mm (1 1/2 inches) below roof deck surface, unless otherwise shown or required by deck configuration. Holes for

26、 drains will be cut in the field. SPEC WRITER NOTE: Delete below unless acoustical deck selected. 8. Acoustic Sound Barrier Closures: Manufacturers standard mineral fiber closures. 2.2 REQUIREMENTS: A. Provide steel decking of the type, depth, gauge, and section properties as shown. SPEC WRITER NOTE

27、: Form deck is of 2 Types: Type 1 form deck is 2 or 3 inch deck similar to composite metal but with no shear deformations, and is used for reinforced and thick slabs where unshored composite is not enough. Type 2 form deck is thin 9/16 or 1 inch corrugated type (centering) used with closely spaced b

28、ar joists. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-11-08M 05 31 00 - 5 B. Metal Form Deck Type 1: Single pan fluted units utilized as a permanent form for reinforced concrete slabs. Comply with the depth and gauge requirements as shown on the

29、 Contract Documents. SPEC WRITER NOTE: Select finish below. 1. Finish: Galvanized G-60. 2. Finish: Phosphatized, painted. C. Metal Form Deck Type 2: Corrugated deck units used as a permanent form for reinforced concrete slabs. Comply with the depth and minimum gauge requirements as shown on the Cont

30、ract Documents. SPEC WRITER NOTE: Select finish below. 1. Finish: Finish painted. 2. Finish: Uncoated. 3. Finish: Galvanized. D. Metal Roof Deck: Single pan fluted units with flat horizontal top surfaces utilized to act as a permanent support for all superimposed loads. Comply with the depth and min

31、imum gage requirements as shown on the Contract Documents. SPEC WRITER NOTE: Select the type or types of deck below, delete the others. Wide Rib (Type B) is typical. 1. Wide Rib (Type B) deck. 2. Intermediate Rib (Type F) deck. 3. Narrow Rib (Type A) deck. 4. Deep Rib (Type N) deck. SPEC WRITER NOTE

32、: Select finish below. Use painted roof deck only for dry climate with short construction exposure. 5. Finish: Galvanized G-60. 6. Finish: Galvanized G-90. 7. Finish: Prime painted. Apply finished coat of paint to underside of deck after installation. Color as selected by Architect. SPEC WRITER NOTE

33、: Retain below for acoustic roof deck. Verify NRC value. E. Acoustic Metal Roof Deck Units: Single-pan fluted units with perforated vertical webs, metal thickness, depth and width as indicated. Provide mineral fiber acoustical insulation strips of profile to fit void space between vertical ribs, wit

34、h a system Noise Reduction Coefficient of 0.90. Submit test results per ASTM C423 certifying acoustical performance. F. Do not use steel deck for hanging supports for any type or kind of building components including suspended ceilings, electrical light Provided by IHSNot for ResaleNo reproduction o

35、r networking permitted without license from IHS-,-,-11-08M 05 31 00 - 6 fixtures, plumbing, heating, or air conditioning pipes or ducts or electrical conduits. G. Steel decking units used for interstitial levels shall include an integral system. 1. System to provide a simple point of attachment for

36、light duty hanger devices. 2. System to allow for flexibility for attaching hangers for support of suspended ceilings, electrical, plumbing, heating, or air conditioning items, weight not to exceed 50 kg/m2 (10 psf). 3. System shall provide for a minimum spacing pattern of 300 mm (12 inches) on cent

37、ers longitudinally and 600 mm (24 inches) on centers transversely. 4. Maximum load suspended from any hanger is 23 kg (50 pounds). 5. System consisting of fold-down type hanger tabs or lip hanger is acceptable. PART 3 - EXECUTION 3.1 ERECTION: A. Do not start installation of metal decking until corr

38、esponding steel framework has been plumbed, aligned and completed and until temporary shoring, where required, has been installed. Remove any oil, dirt, paint, ice, water and rust from steel surfaces to which metal decking will be welded. B. Coordinate and cooperate with structural steel erector in

39、locating decking bundles to prevent overloading of structural members. C. Do not use floor deck units for storage or working platforms until permanently secured. Do not overload deck units once placed. Replace any deck units that become damaged after erection and prior to casting concrete at no cost

40、 to the Government. D. Provide steel decking in sufficient lengths to extend over 3 or more spans, except for interstitial levels. E. Place steel decking units at right angles to supporting members. End laps of sheets of roof deck shall be a minimum of 50 mm (2 inches) and shall occur over supports.

41、 SPEC WRITER NOTE: Factory Mutual Insurance requires screwed side laps (not welded) for roof deck thinner than 18 gage. All UL fire tests for rated floors are run with welded side laps (not screws). Welded side laps may be mandatory in seismic areas. Provided by IHSNot for ResaleNo reproduction or n

42、etworking permitted without license from IHS-,-,-11-08M 05 31 00 - 7 F. Fastening Deck Units: 1. Fasten floor deck units to steel supporting members by not less than 16 mm (5/8 inch) diameter puddle welds or elongated welds of equal strength, spaced not more than 305 mm (12 inches) o.c. with a minim

43、um of two welds per unit at each support. Where two units abut, fasten each unit individually to the supporting steel framework. 2. Tack weld or use self-tapping No. 8 or larger machine screws at 915 mm (3 feet) o.c. for fastening end closures. Only use welds to attach longitudinal end closures. 3.

44、Weld side laps of adjacent floor deck units that span more than 1524 mm (5 feet). Fasten at midspan or 915 mm (3 feet) o.c., whichever is smaller. SPEC WRITER NOTE: Check weld pattern and side lap fastener spacing to develop diaphragm shear strength required. 4. Fasten roof deck units to steel suppo

45、rting members by not less than 16 mm (5/8 inch) diameter puddle welds or elongated welds of equal strength, spaced not more than 305 mm (12 inches) o.c. at every support, and at closer spacing where required for lateral force resistance by diaphragm action. Attach split or partial panels to the stru

46、cture in every valley. In addition, secure deck to each supporting member in ribs where side laps occur. Power driven fasteners may be used in lieu of welding for roof deck if strength equivalent to the welding specified above is provided. Submit test data and design calculations verifying equivalen

47、t design strength. 5. Mechanically fasten side laps of adjacent roof deck units with spans greater than 1524 mm (5 feet) between supports, at intervals not exceeding 915 mm (3 feet) o.c., or midspan, whichever is closer, using self-tapping No. 8 or larger machine screws. 6. Provide any additional fa

48、stening necessary to comply with the requirements of Underwriters Laboratories and/or Factory Mutual to achieve the required ratings. SPEC WRITER NOTE: Revise uplift requirements below to suit project requirements. 7. Uplift Loading: Install and anchor roof deck units to resist gross uplift loading

49、of 2.1 kPa (45 psf) at eave overhang and 1.4 kPa (30 psf) for other roof areas. SPEC WRITER NOTE: Delete below if no corrugated type form deck. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-11-08M 05 31 00 - 8 8. Weld end laps of corrugated form deck units in valley of side lap and at middle of sheet (maximum spacing of