Structural · S-W7KBP

Structural Steel Web Penetration and Reinforcement Detail

Materials

Elements

Beams Connections / Plates Roof / Floor Openings

About this detail

Circular and rectangular web penetrations occur in a wide-flange steel beam. Reinforcement plates weld to the web above and below the opening, with plate grade and thickness matching the web and a minimum thickness of 3/8 inch. Fillet welds with a 5/16-inch size attach the reinforcement plates to the beam web, and all edges are ground smooth. Dimensions define the placement limits, clear distances to supports, and sizing rules relative to the beam depth and opening dimensions.

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