Tech Note G104-23: Welded Box-Beam Flexure Design

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This Tech Note Updates and Replaces Tech Note G104-14

Summary: A box-beam configuration may be used at openings in a floor or wall framing assembly. AISI S100, North American Specification for the Design of Cold-Formed Steel Structural Members only contains design provisions for a built-up flexural members consisting of two C-sections back-to-back used as a flexural member. For built-up members to act as one unit (composite), the members must be connected together with sufficient fasteners and spacing. This Tech Note illustrates the extrapolation of AISI S100 Section I1.1 provisions to a box-beam configuration.

Disclaimer: Designs cited herein are not intended to preclude the use of other materials, assemblies, structures or designs when these other designs demonstrate equivalent performance for the intended use. CFSEI documents are not intended to exclude the use and implementation of any other design or construction technique.

 

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