Structural · S-Y3S96

Welded Drag Connection at Steel Beam Top Flange

Materials

Steel

Elements

Beams Connections / Plates Reinforcing

Connections

Welded Connection Bolted Connection

About this detail

A welded drag connection occurs at the top flange of a steel beam framing into a column. The assembly features an ASTM A572 Grade 50 plate matching the thickness of the larger beam flange on each side of the web, along with continuity plates welded on three sides. A shear connection plate is bolted to the beam web with one line of one-inch diameter A490 slip-critical bolts, with the number of bolts per the structural schedule. Ultrasonic testing of complete joint penetration welds is required per general notes, allowing the backing bar to remain in place with a quarter-inch reinforcing fillet provided to column flanges or sideplates while left unconnected to the beam flange.

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