Secondary framing, Lgsi i – Metal Sales Secondary Framing User Manual
Page 47
PSF-47
Secondary Framing
© Metal Sales Manufacturing Corporation/ Subject to change without notice/ Effective Date 9/11
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lGsi i
nformaTion
The 2001 revision of the AISI specifications made it necessary for manufacturers of light gauge structural sections to make sub-
stantial revisions to their design properties, load table, and other published data.
In an effort to answer the requirements mandated by this code revision, several manufacturers formed the Light Gauge Structural
Institute in 1989. The Light Gauge Structural Institute is a nonprofit organization comprised of member companies who are in the
business of manufacturing light gauge cold-formed sections. This manual is the result of an effort to develop uniform information
about light gauge structural sections.
Companies that are members of the Light Gauge Structural Institute conform to a set of bylaws and standards that ensure their
compliance with the various policies set forth by the institute including, but not limited to, annual unannounced inspections that
allow members to receive certification of compliance.
The AISI code revisions created a need to investigate light gauge structural sections in a manner not previously addressed. As a
part of this investigation, sections with unequal flanges were considered; and as a result of considerable design analysis and study,
it became obvious that unequal flanges offered considerable advantages, particularly due to the number of applications that were
lapped.
Metal Sales also manufactures other light gauge structural sections that are not included in the scope of this manual. Metal
Sales will provide information for these shapes unique to their operation. However, a requirement of the Light Gauge Structural
Institute is that these shapes be designed in the same manner and using the same criteria applied to the sections in the Light Gauge
Structural Steel Framing System Design Handbook.
Section properties, section allowables, load tables and sample calculations are available in the "Light Gauge Structural Steel
Framing System Design Handbook". Please refer to the latest edition of this handbook when inquiring about Light Gauge Struc-
tural Institute criteria.
Light Gage Structural Steel
Framing System Design
Handbook
Volume 1