Washington DC – The American Iron and Steel Institute (AISI) has published AISI S250-21, “North American Cold Formed Steel Frame Building Envelope Heat Transfer Standard, 2021 Edition,” as a single source for calculating the heat transfer coefficient for walls. containing a cold formed steel frame and (U-factor) ceiling/roof shell components. The standard is intended for adoption and use in the United States, Canada and Mexico and is available for free download from www.aisistandards.org.
The AISI S250-21 was designed to eventually replace many of the approaches in various current energy codes and standards, most of which are limited to 16″ or 24″ wall mounts on data center frames. The standard math options are divided into:
AISI S250-21 is intended to represent the next level of analysis in the well-known modified domain method, originally created in 1997. The advantages of AISI S250-21 over all previous calculation methods are the ability to analyze wall assemblies with the following characteristics:
The AISI Framework Standards Committee has created a spreadsheet to perform mathematical calculations in accordance with AISI S250-21. This table is freely available and significantly reduces the time required to calculate the various components of the envelope in accordance with the standard.
AISI serves as the voice of government policy for the US steel industry and promotes steel as the material of choice in the market. AISI also plays a leading role in the development and application of new steel products and steelmaking technologies. AISI is made up of steelmakers with integrated arc furnaces and associated members who are suppliers or customers of the steel industry. To learn more about steel and its applications, visit the AISI website at www.steel.org. Follow AISI on Facebook or Twitter (@AISIsteel).
Post time: Jul-15-2023