Structural · S-S3ZKH

Braced Frame Column Moment Connection

Materials

Steel Metal (misc.)

Elements

Columns Beams Bracing Connections / Plates

Connections

Moment Connection Braced Frame Connection Gusset Plate Bracing Connection Welded Connection Bolted Connection

About this detail

A structural detail for a beam-to-column moment connection incorporates continuous top and bottom plates on both sides of the frame column. A cap plate features a width matching either the column or beam, whichever is larger, and connects via a partial-joint-penetration weld to the flange and a five-sixteenths-inch fillet weld to the web. The beam web connects to the column flange using a complete-joint-penetration weld, supplemented by an erection plate secured with bolts provided by the steel fabricator. Continuous plates feature complete-joint-penetration welds top and bottom, with five-sixteenths-inch fillet welds attaching the weld backing where applicable. Specific notes require the removal of weld backing, backgouging to sound weld metal, and the addition of a fillet weld, with an alternative option for beam-column only connections to leave the backing in place and attach it with a continuous fillet weld.

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