COLD FORMED METAL FRAMING
PART 1 GENERAL
- Section Includes:
- Load-bearing metal studs walls and partition framing, with anchorage and bracing.
- Related Documents: The Contract Documents, as defined in Section 01110 - Summary of Work, apply to the Work of
this Section . Additional requirements and information necessary to complete the Work of this Section may be found in other Documents.
- American Iron and Steel Institute (AISI)
- Specification for the Design of Cold-Formed Steel Structural Members
- Cold-Formed Steel Design Manual (Latest).
- American National Standards Institute (ANSI)
- ANSI A58.1 Roof, Wind and Snow Loads.
- American Society for Testing and Materials (ASTM):
- ASTM A446 - Steel Sheet, Zinc-coated (galvanized) by Hot-Dip Process, Structural (Physical) Quality.
- ASTM A570 Hot-Rolled Carbon Steel Sheet & Strip, Structural Quality.
- ASTM A525 - Sheet Steel, Zinc Coated (Galvanized) by the Hot-Dip Process, General Requirements.
- ASTM A611 - Standard Specification for Steel, Cold-Rolled Sheet, Carbon, Structural
- ASTM C955 - Standard Specification for Lead Bearing Steel Studs, Runners (Track), Bracing, and Bridging.
- American Welding Society (AWS):
- AWS D1.1 - Structural Welding Code and D1.3 - Specifications for Welding Sheet Steel in Structures.
- AWS - Standard Qualification Procedure
- Federal Specification.
- FS TT-P-636C - Rust-Inhibitive Paint.
- Metal Lath/Steel Framing Association (ML/SFA) - Lightweight Steel Framing Systems Manual, Latest Edition.
1.3 SYSTEM DESCRIPTION
- Design Requirements: The supplier shall design and/or verify the size and strength of all light gauge cold-formed
Metal Framing members and connections in accordance with the ML/SFA Lightweight Steel Framing Systems Manual.
- Design shall use the superimposed design loads specified in the Design Criteria section of the Structural
General Notes and the Contract Drawings.
- Design shall be based upon information shown on the drawings and specified herein.
- Additional Design Criteria - ANSI A58.1 or:
- Load-bearing partitions:
- Lateral pressures: 5 psf
- Non-load-bearing partitions:
- Lateral pressures: 5 psf
- Exterior curtain walls:
- Wind loads based on wind speeds of 80 MPH.
- Maximum allowable deflection with brick veneer:
- Calculated on 18 ga. stud capacity alone: 1/600.
4. Design shall conform to: AISI Specification for the Design of Cold-Formed Steel Structural Members.
Wall bridging shall be designed to provide resistance to minor axis bending and rotation of wall studs.
Designated selected exterior and/or interior walls shall be designed to provide frame stability and lateral load
Resistance. All connections (member to member, and member to structure) shall be designed and detailed.
- Qualification of Field Welding: Qualify welding process and welding operators in accordance with AWS
Standard Qualification Procedure.
- Section 01330 - Submittal Procedures: Procedures for submittals.
- All shop drawings and calculations must bear the seal and signature of an engineer registered in the
jurisdiction where the project is being constructed.
- Product Data:
- Manufacturers' literature containing product and installation specifications and details.
- Shop Drawings:
- Documents illustrating materials, shop coatings, steel thickness, details of fabrication and
erection, details of attachment, spacing of fasteners, required accessories and critical installation
- Engineering calculations or data verifying the framing assembly's ability to meet or exceed design
requirements as stated here-in and required by local codes; prepared under the supervision of a
- Assurance/Control Submittals:
a. Test Reports: Submit the following reports directly to Contracting Officer from Testing
Laboratory, with a copy to Contractor. Prepare reports in conformance with Section 01450-
- Testing/Inspection reports conducted on shop and field-bolted and welded connections.
Include data on type(s) of tests conducted and test results. Note inspection findings.
- Certificates: Manufacturer's certificate that Products meet or exceed specified requirements.
- Qualification Documentation: Submit documentation of experience indicating compliance with
specified qualification requirements.
1.5 QUALITY ASSURANCE
1. Manufacturer and Installer: Company specializing in the manufacturing and installation of products
specified in this specification: Fabrication and installation by:
SUPERIOR TRUSS & PANEL, INC.
2204 W. 159TH STREET
MARKHAM, ILLINOIS 60426-9998
PH : 708-339-1200 FAX : 708-339-1248
Web Site : www.superior-truss.com
CONTACT: MIKE GONCHER OR BRYCE WELTY
- Pre-Installation Meetings:
- Convene a pre-installation meeting one week prior to commencing Work of this Section. Notify the
Architect and Contracting Officer of the meeting date and time at least 7 days prior.
- Require attendance of parties directly affecting Work of this Section
- Review conditions of operations, procedures and coordination with related Work.
- Tour, inspect, and discuss conditions of installation 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 provisions for interfacing work.
- Review required submittals, both completed and yet to be completed.
- Review Drawings.
- Review and finalize construction schedule related to cold formed metal framing installation and verify availability of materials, personnel, equipment, and facilities needed to make progress and avoid delays.
- Review required inspections, testing, certifying, and material usage accounting procedures.
- Review weather and forecasted weather conditions, and procedures for coping with unfavorable conditions.
- Review safety precautions relating to operations.
1.6 DELIVERY, STORAGE, AND HANDLING
- Section 01600 - Product Requirements: Transport, handle, store and protect Products.
- Protect metal framing units from rusting and damage. Deliver to project site in manufacturer's unopened containers or
bundles, fully identified with name, brand, type and grade. Store off ground in a dry ventilated space or protect with suitable waterproof coverings and protect against mechanical damage to units. Store materials on a flat plane. Any damaged materials shall be removed from the site.
PART 2 PRODUCTS
- All studs and/or joists and accessories shall be of the type, size, gauge and spacing shown on the plans or as
required by manufacturer design, if called for. Studs, runners (track), bracing, and bridging shall be manufactured per ASTM Specification C-955
- All galvanized studs, joists and accessories shall be formed from steel that conforms to the requirements of ASTM A-466, as set forth in Section 1.2 of the AISI Specification for Design of Cold-Formed Steel Structural Members (latest edition).
- All galvanized studs, joists and accessories shall have a minimum G-60 coating.
- All section properties shall be calculated in accordance with AISI Specification for the Design of Cold-Formed Steel Structural Members (latest edition).
- General: Framing components may be prefabricated prior to erection. Fabricate components plumb, square, true to
line and braced against racking with joints welded. Perform lifting of prefabricated components in a manner to prevent damage or distortion.
- Fastenings: Attach similar components by welding or mechanical fasteners. Attach dissimilar components by screw
Fasteners, as standard with manufacturer.
- Cutting of steel framing members may be accomplished with a saw or shear. Torch cutting of load carrying members
is not permitted
- Wire tying of framing components is not permitted.
PART 3 EXECUTION
3.2 INSTALLATION AND STUDWALLS
- Section 01700 - Execution Requirements: Verification of existing conditions before starting work.
- Verification of Conditions: Verify that field measurements, surfaces, substrates and conditions are as required, and ready to receive Work.
- Report in writing to Contracting Office prevailing conditions that will adversely affect satisfactory execution of the Work of this Section. Do not proceed with Work until unsatisfactory conditions have been corrected.
- By beginning Work, Contractor accepts conditions and assumes responsibility for correcting unsuitable conditions encountered at no additional cost to the United States Postal Service.
- Manufacturer's instructions: Install metal framing systems in accordance with manufacturer's printed or written
Instructions and recommendations, unless otherwise indicated.
- Stud Walls:
- 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 on center spacing for nail or power-driven fasteners, or 16 inches on center for other types of attachment. Provide fasteners at corners and ends of tracks.
2. Position studs plumb in runners and space no greater than 16 inches and not more than 2 inches from abutting walls and at each side of openings. Connect studs to upper and lower tracks using self-drilling, screws or
welding in accordance with Manufacturer's recommendations such that the connection meets or exceeds the
design loads required at that connection.
3. Brace all studs at mid-height for added strength and stiffness.
4. Construct corners using minimum of three studs. Double studs at door, window, and sidelight jambs. Install
intermediate studs above and below openings to match wall stud spacing.
- Provide deflection allowance below supported horizontal building framing in ceiling or head track for non-
load-bearing framing in a method recommended by stud manufacturer.
- Where walls and partitions must close out against the deck for smoke and fire separation provide a
top track rigidly attached to vertical studs but free to move vertically in a break-formed deep leg track rigidly attached to deck with slack to accommodate structural live load deflections noted on drawings.
- Where wall or partition studs pass by the structural deck provide vertical slide clips welded or screw
attached to the structural support but do not attach rigidly to studs.
3.3 INSTALLATION: PRE-FABRICATED AND PANELIZED CONSTRUCTION
3.4 INSTALLATION: NON-PANELIZED (STICK BUILT) MEMBERS
- Panels shall be designed to resist construction and handling loads as well as service loads.
3.5 INSTALLATION: JOISTS
- Align track accurately at supporting structure and fasten to structure as shown on shop drawings.
- Track intersections shall butt evenly.
- Studs shall be plumbed, aligned, and securely attached to flanges or webs of upper and lower tracks. Axially loaded studs shall be seated squarely in both top and bottom tracks.
3.6 FASTENING AND ATTACHMENTS
- Joist shall be located directly over bearing studs or a load distribution member shall be provided to transfer loads.
- Provide web stiffeners where necessary at reaction points, and at points of concentrated loads, as shown on the shop drawings.
- Bridging, either strap or solid, shall be provided as shown on the shop drawings.
- Provide additional joists under parallel partitions where the partition length exceeds 1/2 of the joist span.
- Provide additional joists around all floor/roof openings which are larger than the joist spacing and as noted on the shop drawings.
- End blocking shall be provided where joist ends are not otherwise restrained from rotation.
- Anchorage of the tracks to the structure shall be with methods designed for the specific application of sheet to that
surface. Size, penetration, type and spacing shall be determined by design.
- Welds shall conform to the requirements of AWS D1.1, AWS D1.3, and AISI Manual Section 4.2. Welds may be
Butt, fillet, spot, or groove type, the appropriateness of which shall be determined by, and within the design calculations. All welds shall be touched-up using zinc rich paint to galvanized members, and paint similar to that used by the manufacturer for painted members.
- Steel drill screws shall be of the minimum diameter indicated by the design of that particular attachment detail.
Penetration through joined materials shall not be less than 3 exposed threads.
- Wire tying in structural applications is not permitted.
- Site Tolerances:
- Vertical alignment (plumbness) of studs shall be within 1/960th (1/8 inch in 10.0 inches) of the span.
- Horizontal alignment (levelness) of walls shall be within 1/960th (1/8 inch in 10.0 inches) of their respective lengths.
- Spacing of studs shall not be more than + 1/8 inch from the designed spacing providing that the cumulative error does not exceed the requirements of the finishing materials.
- Squareness - Prefabricated panels shall not be more than 1/8 inch out of square within the length of that panel.
3.8 FIELD QUALITY CONTROL
- Section 01450 - Quality Control: Field testing and inspection
- FIELD QUALITY CONTROL
- Section 01450 - Quality Control: Field testing and inspection.
- Inspect all work in order to assure strict conformance to the shop drawings at all phases of construction.
- All members shall b e checked for proper alignment, bearing, completeness of attachments, proper placement, reinforcement, etc.
- All attachments shall be checked for conformance with the shop drawings. All welds shall be touched-up as specified herein.
- General Inspection of structure shall be completed prior to applying loads to those members.
- Inspections where and as required by local codes shall be controlled inspections.
END OF SECTION