DIVISION 5 METALS SECTION METAL DECKING

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1 DIVISION 5 METALS SECTION PART 1 GENERAL 1.01 SUMMARY A. Section Includes: All labor and materials required to furnish and install metal decking and accessories including shear connectors, closures, hanger devices, edge filler plates, pour stops, sump pans, and end closure angles, where shown on the Drawings and/or required for a complete installation. B. The Engineer has designed a project which will be safe after full completion. The Engineer has no expertise in, and takes no responsibility for, construction means and methods or job site safety during construction, which are exclusively the Contractor's responsibility. Processing and/or approving submittals made by the Contractor which may contain information related to construction methods or safety issues, or participation in meetings where such issues might be discussed, shall not be construed as voluntary assumption by the Engineer of any responsibility for safety procedures. C. Related Sections: Carefully examine all other Sections and all Drawings for related work, which includes but is not limited to: 1. Section , "Cast-In-Place Concrete" 2. Section , "Structural Steel" 3. Section , "Steel Joists" 4. Division 9, "Sprayed Fireproofing" D. Inspection Agency shall be the same agency retained under Section , "Structural Steel." 1.02 QUALITY ASSURANCE A. Reference Standards: 1. North American Specification for the Design of Cold-Formed Steel Structural Members, 2007 Edition, by the American Iron and Steel Institute. 2. Design Manual No. 31 for Composite Decks, Form Decks and Roof Decks, November 2007, by the Steel Deck Institute. 3. Diaphragm Design Manual, Third Edition (DDM03) September 2004, by the Steel Deck Institute. B. Manufacturer's Qualifications: Regularly engaged in the manufacture of similar decking. C. Erector's Qualifications: Minimum five (5) years' experience in installation of similar decking. D. Welder's Qualifications: Personnel and procedures are to be qualified per the requirements of the American Welding Society, as given in AWS D1.3/D1.3M HC

2 1.03 SUBMITTALS A. Certification of Experience: Submit, on request only, written summary of personnel, projects, and equipment which document the experience and qualifications required of the manufacturer, erector, and welders. B. Shop Drawings: 1. Indicate mark, number, type, finish, and location of all deck units. 2. Indicate method of connection to supporting members. Provide literature from the fastener and/or deck manufacturers verifying compliance with the minimum required diaphragm shear strengths and stiffnesses. 3. Indicate details and installation instructions for all accessories. 4. Indicate sequence of installation, where critical. 5. Notwithstanding any other requirements specified elsewhere in these Specifications, three (3) sets of prints and one (1) set of reproducible shop drawings shall be submitted for approval. The reproducible set will be returned to the Contractor, who will make and distribute as many copies as needed. Only prints with the approval stamp printed on them shall be permitted on the site. C. Manufacturer's Certification: 1. Certify compliance with structural criteria. Published load tables and literature are usually acceptable. Provide design calculations on request only. 2. Certify compliance with finish criteria, with test reports as required. 3. Furnish evidence of listing by Underwriters' Laboratory for the specified fire resistance rating. 4. Submit, on request only, mill test reports and certificates of compliance for shear connectors. 5. Submit the manufacturer's certification of compliance with SDI Design Manual and AISI Specification PRODUCT DELIVERY, STORAGE, AND HANDLING A. Prevent damage to deck or finish during handling and storage. B. Store on blocking or platforms, off the ground, with one end elevated for drainage. C. Protect from rusting with waterproof covering, or storage under roof. PART 2 PRODUCTS 2.01 DESIGN CRITERIA A. Typical Roof Deck: 1. Type: 1 1/2 inches deep, 20 gauge minimum, wide rib. 2. Finish: Galvanized. 3. Acceptable products include, but are not limited to: a. B by New Millennium b. B-Dek by Consolidated Systems, Inc. c. 1.5B by Vulcraft Division of Nucor Corp. d. 1.5B by Cordeck Building Solutions HC1-033

3 B. Composite Floor Deck: 1. Type: 3 inches deep, 20 gauge minimum. 2. Finish: Galvanized. 3. Fire Resistance: Deck units must bear the Underwriters' Laboratory Classification for a Design No. having the unrestrained assembly rating indicated on the Drawings with the concrete strength and thickness shown on the Drawings. 4. Structural Criteria: a. Bare deck is to support wet load of concrete (including excess due to deflection of deck and beams) plus 20 psf. Maximum deflection under this load is not to exceed L/180. Increase gage of deck where this would be exceeded. b. Composite slab is to support the live load shown on the Drawings, plus a superimposed dead load of 15 psf. Maximum deflection under this load is not to exceed L/360. Increase gage of deck where this would be exceeded. 5. Acceptable products include, but are not limited to: a. QL-99 by H.H. Robertson Company. b. CFD-3 by Consolidated Systems, Inc. c. 3 VLI by Vulcraft. d. 3 inch Composite Floor Deck by Cordeck Building Solutions. e. 3.0 CD by New Millennium. 6. Other: Number of headed stud shear connectors shown on the Drawings is based on the capacity available using deck with a 6 inch average rib width 12 inches on center. All manufacturers not meeting this criteria must adjust the number of studs as required to provide an equivalent capacity. All costs for additional studs, and their design, are to be borne by the Contractor MATERIALS AND FINISHES A. Materials: Steel sheet conforming to ASTM A653/A653M-11 or A1008/A1008M-12. B. Finishes: 1. Galvanized: Conform to ASTM A653/A653M-11, G60. C. Accessories: Same material and finish as deck units, except that interior closures may be of compressible material. D. Hangers: Provide a system of hangers with composite floor deck, as follows: 1. Hangers may consist of sidelap lip hangers, integral tabs, dovetail slots and hangers, slots and pigtail wires, or other devices. 2. Allowable working load to be 60 lbs. per hanger, minimum. 3. Maximum spacing is to be 24 inches in either direction. E. Field Touch-Up Paint: 1. For galvanized deck, use zinc chromate paint. F. Shear Connectors: Headed studs conforming to ASTM A108-07, Grades 1010 through 1020, inclusive, either semi-killed or killed deoxidation. G. Welding Electrodes: Conform to requirements of AWS D1.3/D1.3M-2008 using Series E60 electrodes, appropriate for the materials being welded, with welding washers as required. 13-HC

4 H. Driven Fasteners: Manufactured from AISI 1061, 1062 or 1065 steel austempered to a minimum core hardness of RC, and zinc-plated in accordance with ASTM B or ASTM B695-04(2009) to a minimum thickness of inches. Acceptable manufacturers include, but are not limited to: 1. Hilti Fastening Systems 2. ITW Buildex 3. Pneutek, Inc. I. Self-drilling Fasteners: Heat-treated and zinc-plated with fluted drill point. Acceptable products include, but are not limited to: 1. Traxx screws by ITW Buildex. 2. Kwik-Pro by Hilti Fastening Systems FABRICATION A. Units are to be continuous over at least three (3)spans, where possible. Where units are single or double span, use heavier gage if required for stress or deflection control. End laps (2 inches minimum) are to occur over supports. (End laps not required for composite floor deck.) B. Units are to have nested side laps. PART 3 EXECUTION 3.01 SURFACE CONDITIONS A. Prior to beginning work of this Section, verify that the installed work of other trades is complete and correct to the extent necessary for the proper execution of the work of this Section. B. In the event of discrepancies, immediately notify the Architect. Do not proceed with work affected by the discrepancies until they have been resolved ERECTION A. Install decking in accordance with approved placing Drawings. B. Tolerance: Align adjacent units within 1/4 inch in 40 feet. C. Connection to Supporting Members: Connect to supports from top side only. Powder- and pneumatically-driven fasteners are not permitted. Welds which burn holes in decking or supporting members will be rejected. Erector shall select the method of connecting the deck to the supports, including the connector type and spacing, and also the method of sidelap fastening, including the connector type and spacing, to provide the following minimum diaphragm shear strengths and stiffnesses, in accordance with the SDI Diaphragm Design Manual: HC1-033

5 Deck Type Shear Strength (plf) Stiffness (k/in) 1 1/2 inch roof deck Composite floor deck (including concrete fill) Submit for approval the proposed method of connecting the deck and information verifying compliance with the above requirements. Additional minimum requirements for connections are as follows: 1. Roof Deck: Attach to resist a gross uplift of 30 lbs. per square foot in all other areas. Connections shall occur at every other rib for 1 1/2 inch roof deck (12 inch spacing), except all side laps shall be connected to supports. 2. Composite Floor Deck: Connections may include thru-welded shear connectors. Connections shall occur at all ribs (12 inch spacing). 3. Miscellaneous: Connection spacing shall be the same for all supports (both interior and end lap supports). D. Shear Connectors: 1. Space studs equally along beam length, to the extent possible (unless other distribution is noted on the Drawings). 2. Where number of studs on a beam exceeds the number of available ribs in the deck, the ribs with multiple studs are to be those nearest the ends of the beam. 3. Where a rib contains one stud, locate the stud directly over the beam web; where it contains more than one stud, arrange them symmetrically about the beam web. Maintain minimum center-to-center spacing of 4 1/2 inches along length of beam, and 3 inches transverse to beam. E. Sidelap Fastening: Spacing shall not exceed 3 feet. Decrease spacing if required for UL fire resistance design. Button punching is not permitted. F. Closures: Install in deck flutes over supports or other construction at building perimeter and at perimeters of interior rooms. Set in a true even line, flush with construction below, eliminating any shelf or pocket. Closures are to be accurately shaped and installed, to provide a tight fit. G. Openings: Field cut small openings, bevels, miters, etc., as required. Provide reinforcing for openings which interrupt ribs. H. Hanging Loads: Do not hang items from the underside of metal roof decks. Hang items from concrete floors formed with composite floor deck no sooner than seven (7) days after concrete is placed. I. Construction Loads: Do not use deck as storage or working platform until it has been permanently attached to supports. Assure that construction loads do not exceed the carrying capacity of the deck. 13-HC

6 J. Repair and Touch-Up: 1. Where deck will be exposed to view, remove and replace any units with damage or defects which cannot be concealed by painting. 2. Where deck will not be exposed to view, repair any cuts and holes with plate of same gage as deck. 3. Touch up all damaged areas of finish, on both top and bottom sides of deck FIELD QUALITY CONTROL A. Inspection shall include visual examination of deck and its attachment to the supporting structure, including quantity of connectors and/or fusion welds and the quality of the connections to the supporting structure. B. Inspect installation of welded stud shear connectors for composite beams per the requirements of AWS D1.1/D1.1M:2010, Articles 7.7 and 7.8. END OF SECTION HC1-033