Structural · S-TD8KC

Steel Beam Web Opening Size and Spacing Criteria

Materials

Composite

Elements

Beams Roof / Floor Openings

Connections

Shear Stud / Composite

About this detail

This structural detail outlines dimensional criteria for circular and rectangular web openings in steel beams. Circular openings are restricted to a maximum diameter of one-third the beam depth, while rectangular openings are limited to one-fourth the beam depth and width. Corners of rectangular openings require a radius of two times the web thickness with a one-half-inch minimum. Minimum spacing requirements depend on whether the beam is composite or noncomposite, along with distance limitations from transverse members.

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