Section 4.0 - Design Strength of Structural Steel

ID #1136

In Section 4.4.1 of TIA/EIA-222-G December 2009 the minimum bracing resistance (Ps) is given an upper and lower limit. The lower limit relates to the 1.5% requirement in 222-F Sec. 3.1.13. However what is the purpose for the upper limit of 2.5%*Fs?

Research indicates that the force required to provide restraint does not increase beyond 2.5% as the slenderness ratio of the supported member increases beyond 120.

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Last update: 2013-08-08 15:17
Author: John Erichsen
Revision: 1.0

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