SPECIFICATION FOR THE DESIGN OF - Transcon Steel

Commentary on the Prescriptive Method for One and Two Family Dwellings - 2004
iii
PREFACE
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 Prescriptive Method (AISI, 2001d). In 2004, this Commentary was expanded to address the 2004
Supplement to the Standard for Cold-Formed Steel Framing – Prescriptive Method for One and Two
Family Dwellings, 2001 Edition (AISI, 2004).
The loads, load combinations, and other design parameters used to develop the provisions
in the Prescriptive Method were based on the International Residential Code (ICC, 2000b), the
International Building Code (ICC, 2000a) (where no provisions are included in the IRC) and ASCE
7 (ASCE, 1998).
Commentary is provided only for those sections of the Prescriptive Method 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 Prescriptive
Method 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 Prescriptive Method or by the General Provisions (AISI,
2001a).
The Committee acknowledges and 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.