PART 1 - GENERAL 1.01 SUMMARY A. Types of cold-formed metal framing units include the following: 1. C-shaped steel studs B. Related work specified elsewhere includes but may not be limited to: 1. Section 01012: Preferred Purchasing 2. Section 06100: Rough Carpentry for plywood sheathing 3. Section 09260: Gypsum Drywall for Gypsum board 1.02 PREFERRED PURCHASING A. Unless noted otherwise, Contractor and all subcontractors are encouraged to purchase all products listed in this specification section from a local The Home Depot Store. For more information, refer to Section 01012. 1.03 REFERENCES A. Unless otherwise shown or specified, this work shall conform to the following standards: 1. ASTM A780-01 - Standard Practice for Repair of Damaged and Uncoated areas of Hot-Dip Galvanized Coatings. 2. ASTM A1003/A1003M-05 - Standard Specification for Steel Sheet, Carbon, Metallic- and Nonmetallic-Coated for Cold-Formed Framing Members. 3. ASTM B633-07 - Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel. 4. ASTM C645-07 - Standard Specification for Nonstructural Steel Framing Members. 5. ASTM C754-04 - Standard Specification for Installation of Steel Framing Members to Receive Screw-Attached Gypsum Panel Products. 6. ASTM C955-06 - Standard Specification for Load-Bearing (Transverse and Axial) Steel Studs, Runners (Tracks), and Bracing or Bridging for Screw Application of Gypsum Panel Products and Metal Plaster Bases. 7. ASTM C1007-04 - Standard Specification for Load-Bearing (Transverse and Axial) Steel Studs and Related Accessories 8. ASTM C1513-04 - Standard Specification for Steel Tapping Screws for Cold-Formed Steel Framing Connections. 9. AISI Specification for the Design of Cold-Formed Structural Members; 2002. 10. AISI - Standard for Cold-Formed Steel Framing General Provisions 1.04 SUBMITTALS TO CONTRACTOR A. Product Data: Manufacturer's data sheets on each product specified, including: 1. Preparation instructions and recommendations. 2. Storage and handling requirements and recommendations. 3. Installation methods. 1.05 QUALITY ASSURANCE A. Installer Qualifications: Installer experienced in performing work of this section who has specialized in installation of work similar to that required for this project. B. Component Design: Calculate structural properties of studs and joists in accordance with American Iron and Steel Institute (AISI) "Specification for Design of Cold-Formed Steel Structural Members." C. Welding: Use qualified welders and comply with American Welding Society (AWS) D1.3, "Structural Welding Code - Sheet Steel." D. Fire-Rated Assemblies: Where framing units are components of assemblies indicated for a fire-resistance rating, including those required for compliance with governing regulations, provide units that have been approved by governing authorities that have jurisdiction. E. Pre-Installation Conference: Prior to start of installation of metal framing systems, meet at project site with installers of other work including door and window frames and mechanical and electrical work. Review areas of potential interference and conflicts, and coordinate layout and support provision for interfacing work. Do not begin work until all unsatisfactory work is corrected. 1.06 DELIVERY, STORAGE, AND HANDLING A. Store products in manufacturer's unopened packaging until ready for installation per requirements of ASTM C645. 1.07 PROJECT CONDITIONS Home Depot Page 1 of 5
A. Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits. PART 2 - PRODUCTS 2.01 MANUFACTURERS A. Manufacturers: Current members of the steel stud manufacturers association (SSMA), reference SSMA s website at www.ssma.com for current member listings. Subject to compliance with requirements, provide products from: 1. Dietrich Metal Framing 2. Marino\Ware 3. The Steel Network, Raleigh, NC 27615, Phone (919) 845-1025, Fax (919) 845-1028 2.02 MATERIALS A. Cold-Formed Steel: Complying with ASTM A 1003/A 1003M; unless indicated otherwise. B. Galvanized Coating: 1. Load Bearing: G60 coating weight minimum, complying with ASTM C 955. 2. Non-Load Bearing: G40 coating weight minimum, complying with ASTM C 645. C. The physical and structural properties listed in the manufacturer s tables shall be considered the minimum permitted for all framing members. 2.03 LOAD-BEARING METAL FRAMING COMPONENTS A. System Components: Manufacturers' standard load-bearing steel studs of type, size, shape, and gage as indicated in drawings. With each type of metal framing required, provide manufacturer's standard steel runners (tracks), blocking, lintels, clip angles, shoes, reinforcements, fasteners, and accessories for applications indicated, as needed to provide a complete metal framing system. B. All framing members shall be manufactured and supplied by one manufacturer. C. Studs: Cold-formed galvanized steel C-Studs: D. Runner Track: Cold-formed galvanized steel Structural Runner Track. Material thickness to match stud/joist thickness unless design dictates heavier thickness. 20 Gauge track thickness is acceptable with the use of a deflection clip for exterior wall that require vertical deflection. E. Slotted Deflection Track: 1. Standard leg of 2 1/2 inches with standard vertical slot of 1 1/2 inches in leg. 2. Product available with 2 1/2 drift slots in web 'special order. 3. Tracks relying on steel flexure to perform are unacceptable. F. Vertical Deflection Clips: 1. Connections must be tested in accordance to ICC AC261 criteria and hold a valid ICC-ES evaluation service to be accepted. 2. Design clips for positive attachment to structure and stud web using step-bushings to permit frictionless vertical movement. 3. Provide clips with attached bushing and screw of the series, size and configuration as required by the structural design calculations. G. Drift Clips: 1. Design clips for positive attachment to structure and stud web using step-bushings to permit frictionless lateral and vertical movement. 2. Provide clips with attached bushing and screw of the series, size and configuration as required by the structural design calculations. H. Clip Angles (Support Clips): 1. Engineered rigid connections by a sole manufacturer, no field fabricated connections will be accepted. I. Bridging: 1. U-Channel: OR 2. Bridging/Spacer Bar: Home Depot Page 2 of 5
a. Minimum Delivered Thickness: 20 gauge, 0.0329 inch (0.84 mm) 3. Bridging Clip: a. Design bridging clips for attachment to stud web and wrapping around the bridging channel. Bridging accessories shall be formed from structural quality steel with minimum yield strength of 50 ksi and have minimum protective coating of G-90 (Z275) J. Web Stiffeners: One-piece web stiffeners attached to joist ends to prevent web crippling. K. Floor Joists: Cold-formed Galvanized Steel C-Joist Floor System: L. Load-Bearing Headers: M. L-Header (Cold-formed galvanized one-piece load-bearing header) 2.04 NON-LOAD BEARING METAL FRAMING COMPONENTS A. System Components: Manufacturers' standard non-load-bearing steel studs of type, size, shape, and gage as indicated. With each type of metal framing required, provide manufacturer's standard steel runners (tracks), blocking, lintels, clip angles, shoes, reinforcements, fasteners, and accessories for applications indicated, as needed to provide a complete metal framing system. B. Studs: Cold-formed galvanized steel drywall C-studs 1. Flanges: Equal lengths 1-1/4 inches (.32 mm) 2. Section Properties: Manufacturer's standard section properties. C. Runner Track: Cold-formed galvanized steel drywall runner track. Thickness equal to stud thickness minimum or heavier per design requirements. 20 gauge track thickness is acceptable with the use of a deflection clip for walls that require vertical deflection. D. Deflection Track: Cold-formed galvanized steel 1. Standard leg 2-1/2 inches 2. Standard Vertical Slot of 1-1/2 inches in leg 3. Product available within 2-1/4 inches drift, slots in web special order 4. Minimum yield strength of 50 ksi in 16 gauge and heavier and minimum yield strength of 33 ksi in 18 gauge and lighter E. Furring Channel: Cold-formed galvanized steel furring channel F. U Channel: Cold-formed galvanized steel U channel G. Metal Trims: Cold-formed galvanized steel J, U, and L Trims H. Drywall Corner Bead: Cold-formed galvanized steel sheet. 1. Type: Heavy Construction CBS hot dipped galvanized. 2. Flange Length: 1-1/4 inches (32 mm). 2.05 ACCESSORIES A. Special Solid Backing Support Plates: 1. Manufacturer s plates designed to provide a solid backing support for handrails, wall-mounted shelving and similar equipment. Comply with ASTM 1003/A1003M or ASTM A653/A653M. B. Framing Component: Provide the following accessories as required for a complete system. 1. Flat Strapping. 2. Angles, Plates, Sheets. 3. Backing Strip. 4. Custom Brake-Formed Shapes. C. Mechanical Fasteners: 1. ASTM C1513-04, corrosion-resistant-coated, self-piercing or self-drilling/self-tapping steel screws. Fasteners must be tested in accordance to ICC AC118 criteria and hold a valid ICC-ES evaluation service report to be accepted. 2. Galvanized coating, plated or oil-phosphate coated complying with ASTM B 633 as needed for required corrosion resistance. Home Depot Page 3 of 5
D. Power-Actuated Anchors: 1. ASTM E1190-95 (2007), fabricated from corrosion-resistant materials. Fastener system to be of type suitable for application indicated. Anchors must be tested in accordance to ICC AC70 criteria and hold a valid ICC-ES evaluation service report to be accepted. E. Touch-Up Paint: Metallic zinc cold galvanizing compound, ZRC-221 by ZRC Worldwide or equal as required F. Non-Hardening, Flexible Sealant: Latex acrylic. 2.06 FABRICATION A. General: Framing components may be prefabricated into assemblies before erection. Fabricate panels plumb, square, true to line, and braced against racking with joints welded. Perform lifting of prefabricated units to prevent damage or distortion. B. Fabricate panels square, with components attached in a manner so as to prevent racking or distortion. C. Cut all framing components squarely for attachment to perpendicular members, or as required for an angular fit against abutting members. Hold members positively in place until properly fastened. If pre-fabricated, fabricate units in jig templates to hold members in proper alignment and position and to assure consistent component placement. D. Axially Loaded Studs: 1. Install studs to have full bearing against inside track web (1/8 inches (3.2 mm) maximum gap) prior to stud and track attachment. 2. Splices in axially loaded studs are not permitted. E. Fastenings: Attach similar components by means of mechanical fasteners or welding. Attach dissimilar components by welding, bolting, or self-tapping screw fasteners, as standard with manufacturer. F. Welding: Welding is permitted on 18 gauge or heavier material only. 1. Specify welding configuration and size on the Structural Calculation submittal. 2. Qualify welding operators in accordance with Section 6.0 of AWS D.1.3. 3. Touch up all welds with zinc-rich paint in compliance with ASTM A 780. G. Wire tying of framing components not permitted. H. Fabrication Tolerances: Fabricate units to a maximum allowable tolerance variation from plumb, level, and true to line of 1/8 inch in 10 feet with a maximum deflection of L/360. PART 3 - EXECUTION 3.01 EXAMINATION A. Prior to installation, inspect previous work of all other trades. Verify that all work is complete and accurate to the point where this installation may properly proceed in strict accordance with framing shop drawings. B. If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding. 3.02 INSTALLATION A. General: Install metal framing systems in accordance with manufacturer's printed or written instruction and recommendations and in accordance with requirements of ASTM C 754. B. Runner Tracks: Install continuous tracks sized to match studs. Align tracks accurately to layout at base and tops of studs. Secure tracks as recommended by stud manufacturer for type of construction involved, except do not exceed 24 inches o.c. spacing for nail or power-driven fasteners or 16 inches o.c. for other types of attachment. Provide fasteners at corners and at ends of tracks. C. Installation of Wall Studs: Secure studs to top and bottom runner tracks by either welding or screw fastening at both inside and outside flanges unless deflection connections are required at head of the wall. D. Splicing of studs will not be permitted. E. Cutting: All cutting shall be done with a power-driven saw with appropriate abrasive blade. No hand cutting will be permitted. All cuts shall be clean, accurate, and true to line. No torch cutting will be permitted. F. Set studs plumb, except as needed for diagonal bracing or required for non-plumb walls or warped surfaces and similar requirements. Home Depot Page 4 of 5
G. Where stud system abuts structural columns or walls, including masonry walls, anchor ends of stiffeners to supporting structure. Metal framing systems located on concrete or masonry surfaces shall be attached to the surfaces with powerdriven fasteners at 24" o.c. unless noted otherwise. H. Install supplementary framing, blocking, and bracing in metal framing system wherever walls or partitions are indicated to support fixtures, equipment, services, casework, heavy trim and furnishings, veneer and exterior finishes, and similar work requiring attachment to the wall or partition. Where type of supplementary support is not otherwise indicated, comply with stud manufacturer's recommendations and industry standards in each case, considering weight or loading resulting from item supported. I. Frame wall openings larger than 2 feet square with double stud at each jamb of frame except where more than two are either shown or indicated in manufacturer's instructions. Install runner tracks and jack studs above and below wall openings. Anchor tracks to jamb studs with stud shoes or by welding, and space jack studs same as full-height studs of wall. Secure stud system wall opening frame in manner indicated. J. Frame both sides of expansion and control joints with separate studs; do not bridge the joint with components of stud system. K. Install horizontal stiffeners in stud system, space (vertical distance) at not more than 48 inches o.c. Weld at each intersection. L. Erection Tolerances: Bolt or weld wall panels (at both horizontal and vertical junctures) to produce flush, even true-to-line joints. Maximum variation in plan and true position between prefabricated assemblies should not exceed 1/16 inch. M. Installation of Joists: Install level, straight, and plumb complete with bracing and reinforcing as indicated on drawings. Provide not less than 1-1/2 inch end bearing. Reinforce ends with end clips, steel hangers, steel angle clips, steel stud section, or as otherwise recommended by joist manufacturer. 3.03 PROTECTION A. Protect installed products until completion of project. B. Touch-up, repair or replace damaged products before Substantial Completion. END OF SECTION Home Depot Page 5 of 5