NEW AISI DESIGN GUIDE

AISI S250-23,Thermal Design and Code Compliance Guide for C-Shape Cold-Formed Steel Framing in Building Envelopes

The American Iron and Steel Institute (AISI) has published AISI D250-23, “Thermal Design and Code Compliance Guide for C-Shape Cold-Formed Steel Framing in Building Envelopes.” The guide was developed to assist users of AISI S250-21 w/S1-22, North American Standard for Thermal Transmittance of Building Envelopes with ColdFormed Steel Framing, 2021 Edition with Supplement 1, 2022 Edition, to calculate the thermal resistance of building envelope assemblies containing cold-formed steel framing.

AISI D250-23 provides a general discussion about the national model codes of the United States and Canada and a general review of the basic principles of thermal dynamics of a building envelope. It also provides thermal design examples covering wall and roof assemblies constructed using AISI S250, a method to address custom or proprietary coldformed steel wall framing, and thermal design examples covering floor assemblies constructed over unconditioned spaces using the International Code Council (ICC) International Energy Conservation Code, 2003 Edition.

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