Cold Form Metal Framing Catalog - (Page 42) DESIGN GUIDE 1. GENERAL 1.1 SUMMARY 1.4 SUBMITTALS A. Section includes pre-engineered, pre-fabricated cold-formed steel framing elements. Work includes: 1. Cold-Formed steel open web floor trusses. 2. Cold-Formed steel roof trusses. 3. Anchorage, bracing and bridging. B. Related Sections 1. Section 05 30 00 – Metal Decking 2. Section 05 40 00 – Cold-Formed Steel Framing 1.2 REFERENCES A. Reference standards: 1. ASTM: a. ASTM A653/A653M-94 “Sheet Steel, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Glavanealed) by the Hot Dip Process.” b. ASTM A780-93a “Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings.” 2. American Welding Society (AWS) a. AWS D1.1 “Structural Welding Code - Steel.” b. AWS D1.3 “Structural Welding Code - Sheet Steel.” 3. Light Gauge Steel Engineers Association Field Installation Guide 4. American Iron and Steel Institute, North American Specification for the Design of Cold-Formed Steel Structural Members, 2001 American Iron and Steel Institute Standard for Cold-Formed Steel Framing – Truss Design, 2001 1.3 PERFORMANCE REQUIREMENTS A. AISI “Specifications”: Calculate structural characteristics of cold-formed steel truss members according to American Iron and Steel Institute “North American Specification for the Design of Cold-Formed Steel Structural Members, 2001” B. Structural Performance: Design, fabricate, and erect cold-formed steel trusses to withstand specified design loads within limits and under 1. Design Loads: As specified. 2. Deflections: Live load deflection meeting the following (unless otherwise specified): a. Roof Trusses: Vertical deflection less than or equal to Length/240. b. Floor Trusses: Vertical deflection less than or equal to Length/480. 3. Design framing systems to provide for movement of framing members without damage or verstressing, sheathing failure, connection failure, undue strain on fasteners and anchors, or other detrimental effects when subject to a maximum ambient A. Submit manufacturer’s product data and installation instructions for each type of coldformed steel framing and accessory required. B. Submit detailed floor truss and roof truss layouts indicating placement of trusses. C. Submit individual truss drawings, sealed and signed by a qualified registered Professional Engineer, verifying accordance with local building code and design requirements. Include: 1. Description of design criteria. 2. Engineering analysis depicting member stresses and truss deflection. 3. Truss member sizes and thickness and connections at truss joints. 4. Truss support reactions. 5. Top chord, Bottom chord and Web bracing requirements. D. Submit final roof and floor plan drawings sealed and signed by a qualified registered Professional Engineer depicting final installed truss assembly. Include: 1. All truss to truss connections 2. All truss to structure (bearing) connections 3. Plan and details for the location of all permanent lateral and diagonal bracing and/or blocking required in the top chord, web, and bottom chord planes. (Diaphragms excluded) 1.5 QUALITY ASSURANCE A. Fabricator Qualifications: Fabrication shall be performed in a quality controlled manufacturing environment by a cold-formed steel truss fabricator with experience fabricating ColdFormed Steel trusses equal in material, design, and scope to the trusses required for this Project. 1. Installation of Cold-Formed Steel truss roof or floor assembly shall be performed by an installer with experience installing Cold-Formed Steel trusses equal in material, design and scope to the trusses required for this Project. B. Welding Standards: Comply with applicable provisions of AWS D1.1 “Structural Welding Code--Steel” and AWS D1.3 “Structural Welding Code--Sheet Steel.” 1. Qualify welding processes and welding operators in accordance with AWSI “Standard Qualification Procedure.” 1.6 DELIVERY, STORAGE AND HANDLING A. Deliver materials in manufacturer’s unopened containers or bundles, fully identified by name, B. Store trusses on blocking, pallets, platforms or other supports off the ground and in an upright position sufficiently braced to avoid damage from excessive bending. C. Protect trusses and accessories from corrosion, deformation, damage and deterioration when stored at job site. Keep trusses free of dirt and other foreign matter. ™ temperature change (range) of 120 deg F (67 deg C). brand, type and grade. Exercise care to avoid damage during unloading, storing and erection. TRUSS SPECIFICATIONS 1.7 PROJECT CONDITIONS A. During construction, adequately distribute all loads applied to trusses so as not to exceed the carrying capacity of any one truss. PART 2 PRODUCTS 2.1 MANUFACTURERS A. Manufacturer: Ultra-Span® Truss Manufacturer. Contact Aegis Metal Framing, LLC at 1-888-902-3447, or www.aegismetalframing. com for a list of authorized fabricators. 2.2 COMPONENTS A. System components: Aegis Metal Framing, LLC ULTRA-SPAN® and POSI-STRUT® light gauge steel roof truss and floor truss components. B. Provide manufacturer’s standard steel truss members, bracing, bridging, blocking, reinforcements, fasteners and accessories with each type of steel framing required, as recommended by the manufacturer for the applications indicated and as needed to provide a complete cold-formed steel truss roof or floor assembly. 2.3 MATERIALS A. Materials: 1. For all chord and web members: Fabricate components of structural quality steel sheet per ASTM A653 with a minimum yield strength of 50,000 psi. 2. Bracing, bridging and blocking members: Fabricate components of commercial quality steel sheet per ASTM A653 with a minimum yield strength of 33,000 psi. B. Ultra-Span steel truss components: Provide sizes, shapes and gauges indicated. 1. Design Uncoated-Steel Thickness: 0.0350 inch (0.89 mm) (nominal 20 ga) 2. Design Uncoated-Steel Thickness: 0.0460 inch (1.17 mm) (nominal 18 ga) 3. Design Uncoated-Steel Thickness: 0.0570 inch (1.45 mm) (nominal 16 ga) 4. Design Uncoated-Steel Thickness: 0.0730 42 Toll Free: 1.866.90.AEGIS . 314.851.2200 . FAX: 314.434.5234 www.aegismetalframing.com . Email: answers@aegismetalframing.com http://www.aegismetalframing.com/Technical/Specification-Creator.html http://www.aegismetalframing.com http://www.aegismetalframing.com
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