(minimum eccentricity) to ensure heavy hex nuts can be tightened without interfering with the shell wall.
It prevents "prying" actions and reduces localized shell buckling by distributing the anchor bolt's eccentricity over a wider area of the shell.
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. 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
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. (minimum eccentricity) to ensure heavy hex nuts can
For high-seismic applications where tanks have thin shells, anchor bolt chairs designed to AISI E-1 specifications are the preferred choice for ensuring long-term structural integrity and maintenance accessibility.
): Calculated by treating the plate as a beam with partially fixed ends. Comparison: Chairs vs
Engineers using this manual must calculate several key dimensions to ensure the chair is "better" than a generic attachment: Chair Height (
Using the offers several advantages over simple gussets or direct bolting: