Three structural steel connection configurations illustrate bottom flange bracing requirements for intersecting wide flange beams with varying depth differences. The first condition applies to a depth difference of six inches maximum, featuring a full-depth connection plate and full-depth stiffener plates welded to the supporting column web. The second condition applies to depth differences between six and twelve inches, adding a gusset plate and stiffeners welded to the bottom flange of the supported beam. The third condition applies to depth differences greater than twelve inches, incorporating an L4x4x1/4 angle brace fastened with one-inch diameter A325-SC bolts at each end and a three-inch plate centered on the beam web.
1/2" 1" CLR 1" CLR BM SEE PLAN BM SEE PLAN 1 1/2" CLR L4x4x1/4 W/ 1"DIA A325SC BOLT EA END 3/8" PL CENTER ON BM WP 1'-0" MAX 2" TYP FULL DEPTH STIFF PL 1 2 1/4 8 FULL DEPTH CONNECTION PL, SEE TYPICAL W BEAM CONNECTION DETAIL FOR BOLT AND WELD INFO BM SEE PLAN CL BM BM SEE PLAN 6" MAX FULL DEPTH STIFF PL CL BM TW 1 1 FOR ITEMS NOT SHOWN OR NOTED SEE FOR ITEMS NOT SHOWN OR NOTED SEE CL BM 2" BM SEE PLAN A 6" MAX DEPTH DIFFERENCE B 6" TO 12" DEPTH DIFFERENCE C GREATER THAN 12" DEPTH DIFFERENCE
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