The American Iron and Steel Institute has published AISI D250-23 (Thermal Design and Code Compliance Guide for C-Shape Cold-Formed Steel Framing in Building Envelopes).
The Standards Council of the American Iron and Steel Institute has formed a new group that will be primarily responsible for the ongoing development of AISI S250, North American Standard for Thermal Transmittance of Building Envelopes with Cold-Formed Steel Framing.