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Checklist for Architects and Engineers Writing CFS Specifications

Cold-formed steel framing design is evolving as the steel industry transitions to AISI standards. Wouldn’t it be nice if you had a cheat sheet to remember key details? We got you covered.

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Building a non-residential or multi-family structure is an incredibly complex process that requires attention to detail by a team of architects, engineers, contractors, suppliers, and manufacturers. To get that job done, the architectural specifications play a key role.

Here’s a checklist to keep your specifications up to date.

Cold Formed Steel Framing Architects Engineers

The experts at SFIA can ease the process of implementing the latest CFS standards into your in-house architectural specifications.

 

Checklist for Writing CFS Specifications

☐ Download AISI S220 and AISI S240. The 2018 IBC references these AISI standards for CFS framing exclusively.

☐ Review your gypsum board and gypsum panel products specifications. Note the 2018 IBC, Chapter 25.

  • The 2018, IBC Chapter 25, Table 2506.2, states that structural framing must conform with AISI S240, and nonstructural framing must conform with AISI S220

☐ While not an AISI requirement, the advice of a registered design professional can be helpful.

  • Significant problems can result if a building official cites the AISI reference in the 2018 IBC, but the project specification only references ASTM standards for CFS framing
  • In the worst-case scenario, the building might need to be re-engineered, or installed material may need to be replaced, or both

☐ Note that some AISI standards have been consolidated into AISI S240.

  • AISI S240 is now a single comprehensive document that consolidates six standards for wall systems, floor systems, roof systems, lateral load-resisting systems, truss assemblies and header assemblies
  • Many states follow older IBCs, which reference multiple AISI standards. The 2015 IBC, for example, references 10 separate AISI standards

☐ Download the free SFIA Guide Specifications, which are in the MasterFormat®, for structural and nonstructural CFS framing.

☐ Consider specifying CFS products manufactured by a SFIA certified manufacturer. SFIA has two Quality Assurance product certification programs that comply with AISI S240 QA requirements.

☐ Include AISI S220 and AISI S240 standards in your specifications to help your framing contractors have the most flexibility on the job site.

  • The AISI S240 standard allows for structural track with a 3/4” flange, whereas the ASTM C955 standard requires a minimum 1-1/4” flange for structural track
  • The standard for nonstructural track is a 1” minimum for both ASTM C645 and AISI S220
  • The AISI standard sets no minimum thickness for CFS studs, so a framing contractor could use the new “EQ” or equivalent stud products. ASTM C645, however, allows for equivalent thickness with testing

☐ Contact SFIA and request a free specification review

  • The SFIA Specifications Review Service is complimentary
  • Out-of-date architectural specifications that don’t sync up with the local building code can cause delays, result in change orders and create liabilities

BuildSteel provides valuable resources, education, and complimentary project assistance related to the use of cold-formed steel framing in low and mid-rise and multi-family construction projects.

Do you need help with an upcoming project? BuildSteel’s team of experts offers complimentary project assistance for new and existing projects. Request assistance now.