Structural · S-CNBP4

HSS Post Connection to Wide Flange Beam Underside

Materials

Steel

Elements

Columns Beams Connections / Plates

Connections

HSS Connection Bolted Connection

About this detail

An HSS post connects to the underside of a wide flange beam using a 1/2-inch base plate welded with a 3/16-inch fillet weld, unless otherwise noted. Four 7/8-inch diameter bolts secure the connection with a gauge per AISC standards. Three-eighths-inch stiffener plates are welded to both sides of the beam web under the base plate, with stiffeners omitted where an intersecting beam occurs. The base plate width is sized to standard gauge plus 3 inches or column width plus 1 inch, whichever is larger. This same detail applies where a post frames into the underside of a wide flange beam, with beam elevation and slope referenced from the framing plan.

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