Structural · S-EKZBR

Buckling-Restrained Braced Frame Weak Axis Bolted Connection

Materials

Elements

Columns Beams Decks Bracing Connections / Plates

Connections

Moment Connection Gusset Plate Bracing Connection Welded Connection Bolted Connection Deck Attachment Expansion / Slip Connection

About this detail

A buckling-restrained brace connection frames into the weak axis of a structural steel column with a wide-flange beam and concrete over metal deck floor assembly. A continuous gusset plate runs full height through the beam depth, centered on the column and beam web, with thickness and dimensions designed by the buckling-restrained brace engineer. Top and bottom Grade 50 stiffener plates match the beam width and align with the beam flanges. The bottom stiffener plate incorporates two 7/8-inch diameter A325 finger-tight bolts with upset threads in 2-inch long slotted holes centered on the beam length. A connection drag plate is attached with a specified array of 7/8-inch diameter A325 slip-critical bolts in matching holes, backed by a doubler plate on the far side as referenced in the schedule. Shims are provided as required to align the beam web center line with the gusset plate and column center line, maintaining a minimum 1/8-inch thickness. Flare bevel welds are specified at the top and bottom per the connection schedule, with perpendicular framing omitted for clarity.

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