Structural · S-5ZS7W

Rectangular Penetration

Materials

Steel

Elements

Beams Connections / Plates Roof / Floor Openings

Connections

Welded Connection

About this detail

A rectangular penetration is cut through the web of a structural steel beam and reinforced with top plates, bottom plates, and side stiffener plates sized per schedule. Side stiffener plates are welded to the web with specified fillet welds and spaced a minimum distance of d/6 from the beam flanges, where d is the beam depth. The opening maintains a minimum clear distance to supports and point loads as defined by design requirements, with corner radii sized per schedule. Top and bottom reinforcement plates extend horizontally beyond the opening width by a dimension equal to the greatest of twelve inches, W/4, or three times the plate width.

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