The American Iron and Steel Institute (AISI) Committee on Framing Standards (COFS) has developed this Commentary on the Standard for Cold-Formed Steel Framing – Prescriptive Method for One and Two Family Dwellings [Commentary] to provide the background, supplemental information, engineering assumptions and methods and detailed calculations for the provisions of the AISI 230 Prescriptive Method (AISI S230-07 W/s2-08).

The loads, load combinations, and other design parameters used to develop the provisions in the AISI S230 were based on the International Residential Code (ICC, 2006b) (where no provisions are included in the IRC) and ASCE 7 (ASCE 2005).

Commentary is provided only for those sections of the AISI S230 where background or supplemental information is of benefit to the user. Sections thought to need no explanation are left blank.

This document is divided into two sections. Section 1, Commentary, contains the background, supplemental information and engineering assumptions. Section 2, Design Examples, contains detailed calculations that demonstrate how the values in the AISI S230 were derived.

Terms within the body of this Commentary that are shown in italics indicate that the italicized word is a defined term by the AISI S230 or by the General Provisions (AISI S200-07).

The Committee acknowledges that is grateful for the contributions of the numerous engineers, researchers, producers and others who have contributed to the body of knowledge on the subjects. The committee wishes to also express their appreciation for the support and encouragement of the Steel Framing Alliance.

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