Significant factors in the generation of waste in this division include packing materials, field conditions, temporary bracing, protection, and metal offcuts.
When using steel framing:
• Require shop drawings of Contractor. There are many systems, each with own requirements, requiring engineered joints and loading analyses. This will add $400--$1000 to cost on a small building.
• Frame exterior walls at 24" on center. Some pre-engineered packages allow even wider spacing. Fewer studs means less steel, which saves resources and, more importantly, reduces thermal bridging.
• Don't invest in any extra cavity insulation when framing with steel. The advantage of thicker walls or higher density insulation drops off quickly when the walls are being short circuited by steel studs. Create the minimum cavity you need for structural and utility purposes, and install insulation to fill the cavity (using full 24" batts, not the more common 22-1/2" batts). Concentrate on exterior foam insulation sheathings or other ways to cover the steel studs with a complete layer of insulation.
• Don't fasten insulating sheathing directly to the studs with metal connectors. Screws or other fasteners will continue the short circuit path of the stud, reducing the effectiveness of the insulation. Instead, Consider installing OSB sheathing or wood strapping on the studs, and fasten the insulation to the panels or strapping.
SECTION 05400 — COLD-FORMED METAL FRAMING
PART 1 — GENERAL
1.01 DESCRIPTION
Extent of cold-formed light gauge steel framing is shown on drawings.
Types of light gage steel framing members for project include the following:
Delete types below not required.
Load-bearing punched channel studs.
"C" shaped steel studs, joist and runner track.
1.02 QUALITY ASSURANCE
Compute structural properties of studs and joists in accordance with AISC "Specifications for the Design of Cold-Formed Steel Structural Members", current edition.
Delete below if no fire rated components. Verify availability from manufacturers.
Where framing units are components of assemblies indicated for a fire resistance rating, including those required for compliance with governing regulations, provide units which have been approved by governing authorities having jurisdiction.
1.03 SUBMITTALS
Submit manufacturer's product information on light gauge cold-formed steel framing and accessories, including other data as may be required to certify compliance with performance requirements specified.
Submit erection and shop drawings for special components and installations not fully dimensioned or detailed in manufacturer's product data. Include placing drawings for framing members showing size and gage designations, number, type, location and spacing. Indicate supplemental strapping, bracing, splices, accessories, and details as required for proper installation.
Submit complete structural calculations for the steel stud and joist curtain wall or bearing systems. Calculation shall cover all studs, jamb studs, runner track, bracing, joist, bridging, attachment of light gauge framing to light gauge framing and attachment of light gauge framing to concrete or structural steel.
Calculations and drawings must be approved in writing by Project Architect or Engineer before work can begin.
1.04 DELIVERY AND STORAGE
Protect framing members from rusting and damage. Deliver to protect site in bundles, fully identified with name, brand, type and grade. Store off ground in a dry ventilated space or protect with suitable waterproof coverings.
PART 2 — PRODUCTS
2.01 SYSTEM COMPONENTS
With each type of metal framing required, provide manufacturer's standard steel runners (tracks), blocking, lintels, clip angles, shoes, reinforcements, fasteners, and accessories as recommended by manufacturer for application indicated, as needed to provide a complete metal framing system.
2.02 MATERIALS AND FINISHES
Fabricate metal framing components of structural quality steel sheet with a minimum yield point of 40,000 psi for studs, and 33,000 psi for runners; ASTM A446. Supply screws as recommended by manufacturer. Where choices exist, give preference to products and materials with recycled content or resource efficient characteristics.
Provide galvanized finish to metal framing components complying with ASTM A 525.
"C"-Shape Studs: Manufacturer's standard load-bearing steel studs of size, shape, and gage indicated, with 1.625" flange and flange return lip.
Manufacturers: one of the following:
Dale Industries, Inc.
Domtar Gypsum
Gold Bond Building Products
Marino/Ware Industries
Unimast Inc.
Select either above or below to suit project.
Punched Channel Studs: Manufacturer's standard, factory punched, load-bearing steel studs of size, shape, and gage indicated, with 1.375" flange.
Manufacturers: one of the following:
Dale Industries, Inc.
Domtar Gypsum
Gold Bond Building Products
Marino/Ware Industries
Unimast Inc.
Joists: Manufacturer's standard C-shape sections of size, shape and gage indicated.
Manufacturers: One of the following:
Dale Industries, Inc.
Domtar Gypsum
Gold Bond Building Products
Marino/Ware Industries
Unimast Inc.
PART 3 — EXECUTION
3.01 PREFABRICATION
Framing components may be prefabricated into panels prior to erection. Fabricate panels plumb, square, true to line and braced against racking with joints welded. Perform lifting of prefabricated panels to prevent damage or distortion.
3.02 WASTE MANAGEMENT
Separate metal waste for recycling and place in designated containers in accordance with local recycler standards. Fold up metal banding, flatten, and place in designated area.
3.03 FASTENINGS
Attach similar components with self-drilling screws or by welding of sufficient size to ensure the strength of the connection. Wire tying of framing components is not permitted. Touch up all welds with a zinc rich paint.
3.04 INSTALLATION
Install metal framing systems in accordance with manufacturer's printed or written instructions and recommendations, unless otherwise indicated.
Install continuous tracks sized to match studs. Secure tracks as recommended by stud manufacturer for type of construction involved. Provide fasteners at corners and ends of tracks.
Set studs plumb, except as needed for diagonal bracing or required for out of plumb walls or warped surfaces and similar requirements.
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, and similar work.
Where indicated on the drawings, provisions for structural movement shall be provided to prevent transfer of structural load or movement to stud system.
Frame both sides of expansion and control joints, as shown for the wall system, with separate studs and do not bridges the joint with components of the stud system.
Delete below if none used. Add specific installation requirements to suit project.
3.05 INSTALLATION OF JOISTS
Install level and plumb, complete with bracing and reinforcing as indicated. Provide not less than 1-1/2" end bearing.
Reinforce ends with end clips, steel hangers, steel angle clips, steel stud section, end grain wood block, or as otherwise recommended by joist manufacturer.
END OF SECTION 05400
COLD-FORMED METAL FRAMING 05400-#
courtesy of Design Coalition, Architects. , Madison, Wisconsin, USA ~~ www.designcoalition.org