The formulas are applicable to various structures, including flat-bottom tanks (API 650), conical shells, and tubular columns. Critical Design Considerations
Engineers using this manual must calculate several key dimensions to ensure the chair is "better" than a generic attachment: Chair Height (
Supports the nut and washer, transmitting the bolt tension into the vertical plates. aisi e 1 volume ii part vii anchor bolt chairs better
Using the offers several advantages over simple gussets or direct bolting:
While anchor chairs are excellent for discrete bolt locations, they should not be placed further than 10 feet apart. If the required bolt spacing is less than 2 feet 6 inches, the suggests a continuous top ring may be more efficient than individual chairs. The formulas are applicable to various structures, including
An optional plate used for stability or to increase the bearing area on the foundation. Why the AISI E-1 Method is Superior
): Calculated by treating the plate as a beam with partially fixed ends. If the required bolt spacing is less than
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
In the engineering of industrial storage tanks, pressure vessels, and tall columns, the transition of high tensile loads from anchor bolts into thin-walled shells is a critical structural challenge. (Steel Plate Engineering Data) provides the industry-standard methodology for designing anchor bolt chairs.