Structural · S-9T3ZD

Wide Flange Beam to HSS Column through Plate Connection

Materials

Steel

Elements

Columns Beams Connections / Plates

Connections

HSS Connection Welded Connection Bolted Connection Rebar Splice / Development

About this detail

A wide flange beam frames into a hollow structural section column utilizing a through-plate connection where the plate passes through a slot cut in the column. A continuous plate passes through the deepest beam at the column location with a depth sized per the deeper beam. A one-quarter-inch cap plate is used where no column continues above, while a three-quarter-inch cap plate is used when a column continues above. The plate connects to the beams with standard bolted shear tabs spaced at three inches on center, leaving a one-inch clearance typical between the beam flange and column face. Welds are specified as partial joint penetration typically with complete joint penetration welds at the frame, and a three-sixteenth-inch fillet weld at the one-quarter-inch cap plate only. Complete joint penetration welds at frame column splices are designated as demand critical and must be performed in accordance with AISC 341.

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