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
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
Using the offers several advantages over simple gussets or direct bolting: aisi e 1 volume ii part vii anchor bolt chairs better
(minimum eccentricity) to ensure heavy hex nuts can be tightened without interfering with the shell wall.
): 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 ( Comparison: Chairs vs
It prevents "prying" actions and reduces localized shell buckling by distributing the anchor bolt's eccentricity over a wider area of the shell.
An optional plate used for stability or to increase the bearing area on the foundation. Why the AISI E-1 Method is Superior Typical heights range from 6 to 33 inches
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.
Supports the nut and washer, transmitting the bolt tension into the vertical plates.