Anchor Bolt Chair Design Guidelines | PDF | Bending - Scribd
Anchor Bolt Chair Design Guidelines | PDF | Bending | Column - Scribd
No more guessing if the chair will pull through the concrete under uplift loads. You get calculable, reliable performance.
remains the gold standard for designing anchor bolt chairs, offering a sophisticated engineering approach that significantly outperforms simpler alternatives .
While intermittent welding might pass structural calculations, continuous fillet welds provide superior fatigue resistance and prevent moisture entrapment, minimizing crevice corrosion behind the chair assembly.
Chair height is not arbitrary; it's a function of the tank shell's thickness and diameter. Making a chair too short is a common mistake that can concentrate stress dangerously. Conversely, a properly calculated chair height is the first line of defense against the eccentric bending moment. The guide provides specific equations for calculating the required height to keep combined stresses (bending + direct) within allowable limits.
If calculated chair heights become excessive, one solution is to use a continuous ring at the top of the chairs to help distribute the horizontal force circumferentially. For more technical specifics, engineering platforms like
Large-diameter, flat-bottomed tanks can become unstable under high winds or seismic activity, which can generate significant overturning moments. Anchor chairs are the engineered solution, serving as a robust connection that transfers the overturning load from the tank shell to the embedded anchor bolts in the concrete foundation.
Designers must evaluate anchor bolt locations carefully to avoid interference with the base or bottom plate of the tank. Continuous Rings: