VA 05 21 00-2010 STEEL JOIST FRAMING.pdf

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1、03-10 05 21 00 - 1 SECTION 05 21 00 STEEL JOIST FRAMING 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 open web, longspan, a

2、nd deep longspan steel joists / and joist girders /. 1.2 RELATED WORK: A. Structural Steel: Section 05 12 00, STRUCTURAL STEEL FRAMING. B. Finish Painting: Section 09 91 00, PAINTING. 1.3 DESIGN REQUIREMENTS: Design all elements with the latest published version of applicable Codes. 1.3 TOLERANCES:

3、Deviation from a straight line between ends of any installed joist shall not exceed 10 mm in 3 m (3/8 inch in 10 feet). 1.4 REGULATORY REQUIREMENTS: STEEL JOIST INSTITUTE: Standard Specifications, Load Tables and Weight Tables for Steel Joists and Joist Girders, (Latest Edition). 1.5 SUBMITTALS: A.

4、Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES. B. Shop and Erection Drawings: Complete. 1. Fabrication drawings including details and schedules for the fabrication and assembly of each joist. 2. Erection drawings showing the size and location of each joist, bri

5、dging, cross bracing, bearing details, connections, welds, bolts and bearing plates. C. Certificates: STEEL JOIST INSTITUTE compliance. SPEC WRITER NOTE: Indicate design loads, including uplift loads on drawings. Include snow drift loads by diagram. Slope roofs to preclude ponding. D. Design Calcula

6、tions: If requested by the Resident Engineer, submit complete calculations covering the design of all members and connections. Calculations must be specifically applicable to the joists supplied. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-03-10

7、05 21 00 - 2 1.6 QUALITY ASSURANCE: Provide documentation that the joist manufacturer is a member of the Steel Joist Institute and has satisfactorily completed work of a similar scope and nature. 1.7 APPLICABLE PUBLICATIONS: A. Publications listed below form a part of this specification to extent re

8、ferenced. Publications are referenced in text by basic designation only. B. American Institute of Steel Construction (AISC): 1. Specification for Structural Steel Buildings Allowable Stress Design and Plastic Design (Latest Edition). 2. Load and Resistance Factor Design Specification for Structural

9、Steel Buildings (Latest Edition). C. American Society for Testing and Materials (ASTM): A307-07 Carbon Steel Bolts and Studs, 400 MPa (60,000 psi) Tensile Strength A325-09 Structural Bolts, Steel, Heat Treated, 800/700 MPa (120/105 ksi) Minimum Tensile Strength A490-08 Heat-Treated Steel Structural

10、Bolts, 1000 MPA (150 ksi) Minimum Tensile Strengths D. American Welding Society (AWS): D1.1-08 Structural Welding Code Steel E. SSPC: The Society for Protective Coatings: Steel Structures Painting Manual, Volumes 1 and 2 F. Steel Joist Institute (STEEL JOIST INSTITUTE): Standard Specifications, Load

11、 Tables and Weight Tables for Steel Joists and Joist Girders (Latest Edition). G. U.S. Army Corps of Engineers: CRD-C-621 Specification for Non-Shrink Grout SPEC WRITER NOTE: Update material requirements to agree with applicable requirements (types, grades, classes, and other related items) specifie

12、d in the referenced Applicable Publications. PART 2 - PRODUCTS 2.1 OPEN WEB STEEL JOISTS: K-Series conforming to STEEL JOIST INSTITUTE standard specifications. 2.2 LONGSPAN STEEL JOISTS AND DEEP LONGSPAN STEEL JOISTS: LH-Series and DLH-Series conforming to STEEL JOIST INSTITUTE standard specificatio

13、ns. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-03-10 05 21 00 - 3 2.3 ACCESSORIES FITTINGS: A. Accessories and fittings, including end supports and bridging, in accordance with standard STEEL JOIST INSTITUTE specification under which joists were

14、 designed. B. Unfinished Threaded Fasteners: ASTM A307, Grade A, regular hexagon type, low carbon steel. C. High-strength bolts, including nuts and washers: ASTM A325 or A490 heavy hexagon structural bolts. SPEC WRITER NOTE: Select bedding mortar type to suit project standards, or retain all as cont

15、ractors option. 2.4 BEDDING MORTAR: A. For joist ends bearing on concrete or masonry, provide bedding mortar as follows: 1. Portland cement and sand, mixed at a ratio of 1 part cement to 3 parts sand, by volume, with enough water for placement and hydration. 2. Non-metallic, shrinkage-resistant mort

16、ar; premixed, non-corrosive, non-staining product containing selected silica sands, portland cement, shrinkage compensating agents, plasticizing and water reducing agents, complying with CRD-C-621. PART 3 - EXECUTION 3.1 FABRICATION: A. Fabrication and assembly in accordance with applicable standard

17、 STEEL JOIST INSTITUTE specification: 1. Make chord splices with full penetration welds capable of developing the ultimate strength in tension of the parent material. Make no allowance for the strength of back-up bars or other material incidental to welding. 2. Provide shop-welded connection plates

18、at panel points to receive supplemental framing. SPEC WRITER NOTE: Size and spacing of holes in chords for securing wood nailers and other work should be shown on the drawings. 3. Holes in Chord Members: Provide holes in chord members where shown for securing other work to steel joists; however, ded

19、uct area of holes from the area of chord when calculating strength of member. 4. Extended Ends: Provide extended ends on joists where shown, complying with manufacturers standards and requirements of applicable STEEL JOIST INSTITUTE specifications. SPEC WRITER NOTE: Delete below if no ceiling materi

20、als attached directly to bottom chords (not suspended) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-03-10 05 21 00 - 4 5. Ceiling Extensions: Provide ceiling extension in areas having ceilings attached directly to joist bottom chord. Provide eithe

21、r an extended bottom chord element or a separate unit, to suit manufacturers standards, of sufficient strength to support ceiling construction. Extend ends to within 12 mm (1/2 inch) of finished wall surface unless otherwise indicated. 6. Bridging: Provide horizontal or diagonal type bridging for jo

22、ists and joist girders, complying with STEEL JOIST INSTITUTE specifications. Provide bridging anchors for ends of bridging lines terminating at walls or beams. Provide bridging adequate to resist the loads indicated on the Contract Documents. 7. End Anchorage: Provide end anchorages, including beari

23、ng plates, to secure joists to adjacent construction, complying with STEEL JOIST INSTITUTE specifications, unless otherwise indicated. Design all end anchorages to resist a minimum net uplift of 1.6 kPa (35 pounds per square foot) of supported area. SPEC WRITER NOTE: Delete below if none; applicable

24、 only for K-series joists; coordinate with drawings. 8. Header Units: Provide header units to support all joists at openings in floor or roof system not framed with steel shapes. 9. Provide supplemental steel support framing for metal deck where normal deck bearing is precluded by other framing memb

25、ers and minor openings. 3.2 SHOP PAINTING: A. Shop painting in accordance with applicable STEEL JOIST INSTITUTE standard specification. B. Shop paint joists and accessories with a rust-inhibiting primer paint. For joists which will be finish painted, limit paint to a primer which is compatible with

26、specified finish paint. In high humidity areas, shop paint joists with a zinc-rich primer to receive top coats per the paint system manufacturers recommendations. 3.3 ERECTION: A. Installation of joists in accordance with applicable STEEL JOIST INSTITUTE standard specification. B. Handle joists in a

27、 manner to avoid damaging of joists. Remove damaged joists from site, except when field repair is approved and such repairs are satisfactorily made in accordance with manufacturers recommendations. SPEC WRITER NOTE: Standard specs indicate joists supported on concrete or masonry must rest on steel b

28、earing plates. Plates to be designed and shown by the Structural Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-03-10 05 21 00 - 5 Engineer. Minimum size 100 mm x 150 mm (4 inch x 6 inch) wide for K-series, 150 mm x 230 mm (6 inch x 9 inch) for LH a

29、nd DLH series. C. Accurately set joists and end anchorage in accordance with the applicable STEEL JOIST INSTITUTE standard specification. Secure joists resting on masonry or concrete bearing surfaces by welding or bolting to the steel bearing plates as indicated on the Contract Documents. Secure bri

30、dging and anchoring in place prior to application of any construction loads. Distribute any temporary loads so that carrying capacity of any joist is not exceeded. Loads shall not be applied to bridging where joist lengths are 12 m (40 feet) and longer. Where joist lengths are 12 m (40 feet) and lon

31、ger, install a center row of bolted diagonal bridging to provide lateral stability before slackening of hoisting lines. 3.4 FIELD PAINTING: A. Clean abraded, corroded, and field welded areas and touch up with same type of paint used in shop painting. B. Finish painting of steel surfaces is specified in Section 09 91 00, PAINTING. - - - E N D - - - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-