Structural · S-AY724

Moment and Drag Strut Connection

Materials

Steel

Elements

Beams Stairs Connections / Plates

Connections

Gusset Plate Welded Connection Bolted Connection

About this detail

A structural moment and drag strut connection joins a beam and an adjacent beam or beam stub. The connection utilizes a shear plate with a thickness matching or exceeding the beam web thickness with a three-eighths inch minimum, containing three-quarter inch diameter drilled holes that may be short slotted vertically in the plate. Erection bolts secure the members while complete joint penetration welds are applied at each flange with D1.8-DCW designation. A gusset plate features a one-quarter inch typical weld with a one inch return at each end where it occurs at the beam stub. Weld access holes are detailed per sheet requirements, and where beam stub widths do not match beam flange widths, the wider flange is tapered to avoid tension stress riser points per AWS D1.1 specifications.

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