Structural · S-F37BF

Oversized Holes In Base Plate At Braced Frame

Materials

Steel

Elements

Bracing Anchors / Embeds Connections / Plates

Connections

Braced Frame Connection Base Plate / Anchorage Bolted Connection

About this detail

Dimensional requirements for oversized anchor rod holes in base plates pair anchor rod diameters ranging from three-quarters of an inch to two and one-half inches with corresponding hole diameters, minimum washer diameters, and minimum washer thicknesses. An anchor bolt passes through an oversized hole in a base plate, secured by a nut and washer per schedule. Circular or square washers meeting the specified sizes are acceptable, provided adequate clearance is maintained around the selected washer size. For three-quarter-inch diameter anchor rods used with base plates less than one and one-quarter inches thick, the fabricator may provide one and one-sixteenth-inch diameter holes instead of one and five-sixteenth-inch diameter holes to allow punching.

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