Structural · S-CHMQS

Control Joint at Buckling-Restrained Braced Frame Gusset Plate Base

Materials

Concrete Steel

Elements

Floors / Slabs Bracing Expansion / Control Joints Connections / Plates

Connections

Braced Frame Connection Gusset Plate Base Plate / Anchorage Bracing Connection

About this detail

A column base plate and gusset plate assembly for a buckling-restrained braced frame is set within a concrete foundation pocket. The connection features a Grade 50 base plate measuring 2-1/2 inches thick, secured with twenty 2-inch diameter F1554 Grade 105 anchor bolts equipped with 3/4-inch by 4-inch by 4-inch washers and double nuts. Typical 1/2-inch stiffener plates are welded to the assembly, with the gusset plate provided per the manufacturer and omitted at similar locations. A slab pocket surrounds the base, reinforced with centered number 4 trim bars and a 2-inch clearance. Infill concrete is designated to be cast after the column base plate has been fully grouted. Control joints or construction joints are detailed around the perimeter with minimum 6-inch clearances, and a minimum thread projection of 1/2 inch is required above the top of each nut.

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