PART 1- GENERAL

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1.1 DESCRIPTION

A. Scope of Work All interior and exterior load-bearing and non load-bearing light gauge  steel and wood studs, track, joists, trusses, bridging and related accessories are as indicated on the Contract Drawings and specified herein.

B. Related work specified elsewhere.

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1.2 SUMMARY

A. This Section includes the following:

1. Exterior and Interior non load-bearing walls.

2. Exterior and Interior load-bearing walls.

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1.3 PERFORMANCE REQUIREMENTS

A. Engineering Responsibility: Engage a fabricator who assumes undivided responsibility for engineering FLEX-C ARCH metal framing by employing a qualified professional engineer to prepare design calculations, shop drawings, and other structural data.

B. Design exterior non load-bearing curtainwall framing to accommodate lateral deflection without regard to contribution of sheathing materials.

C.    All Exterior and Interior load-bearing applications are to be engineered by a qualified professional Engineer

 

1.4 QUALITY ASSURANCE

A. Installer Qualifications: Engage an experienced Installer who has completed coldformed metal framing similar in material, design, and extent to that indicated for this project and with a record of successful in-service performance.

B. Standard

1.Work shall meet the requirements of the following standards:

a. American Iron and Steel Institute (A.I.S.I.)”Design of Cold Formed Steel Structural Member,” 1986 and 1989 amendments.
b. American Welding Society (A.W.S.) D.1.3, 1981 “Structural Welding Code-Sheet Steel.”
c. American Society for Testing Materials (A.S.T.M.)
d. American Institute of Steel Construction (A.I.S.C.) “Manual of Steel Construction,” 9th edition.
e. All pertinent Federal, State, and Local codes.

2.  The most stringent requirments shall govern in conflicts between specified codes and standards.

3. Certify that each welder has satisfactorily passed AWS qualification tests for welding processes involved and, if pertinent, has undergone recertification within the past twelve months.
 

C. Inspection

1. As directed by Architect, Owner’s testing agency may inspect the maintenance of a quality control program including spot checking weldments and welding procedures in accordance with A.W.S standards.

2. Full responsibility for quality control shall remain with the Contractor.

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1.5 DELIVERY, STORAGE, AND HANDLING

A. Protect FLEX-C ARCH metal framing from corrosion, deformation, and other damage during delivery, storage, and handling.

B. Store FLEX-C ARCH metal framing, protect with waterproof covering, and ventilate to avoid condensation.

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1.6 SUBMITTALS

A. Structural Calculations

1. Submit structural calculations prepared by the Professional Engineer of record. Calculations shall include, but are not limited to:

a. Description of design criteria.
b. Engineering analysis depicting stress and deflection (stiffness) requirements for each framing application.
c. Selection of framing components and accessories.
d. Verification of attachments to structure and/or adjacent framing components.

B.    Drawings

1. Submit drawings prepared by the manufacturer for approval by the Project Architect  and Engineer. These drawings should include:

a. Cross-sections, plans and/or elevations depicting component locations.
b. Connection details showing screw types and locations, weld lengths and locations or other related fastener requirements.
c. Where the Contractor intends on erecting prefabricated/prefinished panels, drawings depicting panel configurations, dimensions and locations would be developed by the Contractor.

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PART 2- PRODUCTS

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2.1 AVAILABLE MANUFACTURERES:

A. Manufacturers offering FLEX-C ARCH metal framing that may be incorporated in the work include, and are limited to, the following:

FLEX-ABILITY CONCEPTS

3840 N. Tulsa Ave, OKLAHOMA CITY, OK 73112
TEL: (405) 996.5343 FAX: (405) 996.5353
www.flexabilityconcepts.com

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2.2    MATERIALS

A.    Galvanized-Steel Sheet ASTM A 653, and as follows: 

1. Coating Designation: Galvanized Steel equal or superior to ASTM A653 G40 or A40.
2. Grade: 33

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2.3    ARCH FRAMING

A. Flex-C Arch: manufacturer’s standard flexible U-shaped channel assembly with screw attachments at each segment for securing desired radius.

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2.4    FRAMING ACCESSORIES

A.    Fabricate steel-framing accessories of the same material and finish used for framing member; with a minimum yield strength of 33,000 psi.

B.    Provide accessories of manufacturer’s standard thickness and configuration, unless otherwise indicated.

2.5 FASTENERS

A.    Mechanical Fasteners: Corrosion-resistant coated, self-drilling, self-threading steel drill screws.
1.Head Type: Low-profile head beneath sheathing, manufacturer’s standard elsewhere.

B. Welded Electrodes: Comply with AWS standards.

2.6 MISCELLANEOUS MATERIALS

A. Galvanizing Repair Paint: SSPC-Paint 20 of DOD-P-21035, with dry film containing a minimum of 94 percent zinc dust by weight.

2.7 FABRICATION

A. Fabricate FLEX-C ARCH metal framing and accessories plumb, square, true to line, true to radius, and with connections securely fastened, according to manufacturer’s recommendations and the requirements of this Section.

1. Fabricate assemblies in jig templates or free form scribed radiuses.

2. Extreme care should be taken when handling or cutting any metal products

3. Cut FLEX-C ARCH metal framing by sawing or shearing; do not torch cut.

4. Fasten FLEX-C ARCH metal framing by welding or screw fastening, as standard  with fabricator. Wire tying of FLEX-C ARCH framing members is not permitted.

a. Comply with AWS requirements and procedures for welding, appearance and quality of welds, and methods used in correcting welding work.
b. Locate mechanical fasteners and install according to FLEX-C ARCH manufacturer’s instructions with screw penetrating the web and slidable side angle and joined member by not less than 3 exposed screw threads.

5. Fasten other materials to FLEX-C ARCH metal framing by welding, bolting, or screw fastening, according to manufacturer’s recommendations.

B. Reinforce, stiffen, and brace framing assemblies to withstand handling, delivery,   and erection stresses. Lift fabricated assemblies to prevent damage or distortion.

C. Fabrication Tolerances: Fabricate assemblies as required.

PART 3- EXECUTION

1.1 INSTALLATION, GENERAL

A.FLEX-C ARCH metal framing may be shop or field fabricated for installation, or it may be field assembled.

B.Install FLEX-C ARCH metal framing and accessories plumb, square, true to line, true to radius, and with connections securely fastened, according to manufacturer’s recommendations and requirements for this Section.

1.Extreme care should be taken when handling or cutting any metal products. Observe all safety precautions when handling or cutting FLEX-C ARCH.

2.Cut FLEX-C ARCH members by sawing or shearing; do not torch cut.

3.Fasten FLEX-C ARCH members by welding or screw fastening, as standard with fabricator. Wire tying of FLEX-C ARCH members is not permitted.

a. Comply with AWS requirements and procedures for welding, appearance and quality of welds, and methods used in correcting welding work.
b. Locate mechanical fasteners and install according to FLEX-C ARCH manufacturer’s instructions with screw penetrating the web and slidable side angle and joined members by not less than 3 exposed screw threads.
c. Install FELX-C ARCH members in one or multi-piece lengths as specified.
d. Splice FLEX-C ARCH segments by overlapping the webs and slidable angles of the assemblies and jointing them using approved screw fasteners with screw penetrations of not less than 3 exposed screw threads.
e. Provide temporary bracing and leave in place until framing is permanently stabilized.
f. Do not bridge building expansion and control joints with FLEX-C ARCH metal framing. Independently frame both sides of joints.
g. Fasten reinforcements plate over web penetrations that exceed size of manufacturer’s standard punched openings.

3.2 REPAIRS AND PROCTECTION

A. Galvanizing Repairs: Prepare and repair damaged galvanized coating on fabricated and installed FLEX-C ARCH metal framing with galvanizing repair paint according to ASTM A 780 and the manufacturer’s instructions.

B. Touchup painting: Wire brush, clean, and paint scarred areas, welds, and rust spots on fab4ricated and installed prime-painted, FLEX-C ARCH metal framing.

1. Touchup painted surfaces with same type of shop paint used on adjacent surfaces.

C. Provide final protection and maintain conditions in a manner acceptable to manufacturer and installer to ensure that FLEX-C ARCH metal framing is without damage or deterioration at the time of substantial completion.