): Calculated by treating the plate as a beam with partially fixed ends.
The standard requires the chair to be designed to develop the full yield of the anchor bolt, ensuring the bolt stretches—rather than the chair or shell failing—during an overload event like an earthquake. Standardized Clearances: It provides specific formulas for emine sub m i n end-sub aisi e 1 volume ii part vii anchor bolt chairs better
Welds between the vertical plates and the shell must be checked for combined vertical and horizontal loads. A 1/4-inch fillet weld is often sufficient, but larger bolts require detailed verification. Comparison: Chairs vs. Continuous Rings ): Calculated by treating the plate as a
An anchor bolt chair is a fabricated assembly welded to the base of a shell or column. According to the , a standard chair consists of: A 1/4-inch fillet weld is often sufficient, but
): Must be tall enough to distribute the load without overstressing the shell. Typical heights range from 6 to 33 inches depending on the bolt size and shell thickness. Top Plate Thickness (
Engineers using this manual must calculate several key dimensions to ensure the chair is "better" than a generic attachment: Chair Height (
These chairs are considered "better" than alternative fastening methods because they effectively minimize secondary bending stresses in the shell by distributing loads through a rigid, box-like assembly. Core Components of an AISI Anchor Chair