A standard bolt placed too close to an edge will split the concrete. AISI E-1, Part VII chairs are engineered with tables integrated into the design process.
Using this specific design methodology is considered better for high-performance engineering because it addresses the critical issue of localized stresses that can cause shell failure or bolt bending. Why AISI E-1 Part VII Chairs are Better Minimized Shell Bending aisi e 1 volume ii part vii anchor bolt chairs better
The design of anchor bolt chairs follows the standards established in , which provides a widely recognized framework for distributing high anchor bolt loads into the shells of tanks, pressure vessels, and other cylindrical structures. These chairs are essential to minimize secondary bending stresses in the shell that would otherwise occur if bolts were attached directly to a simple base plate . Overview of AISI E-1 Part VII Standards A standard bolt placed too close to an
Reference: AISI S240-20, AISI S100-16 (2020), AISI E-1-16 Vol. II Part VII, and ACI 318-19 Chapter 17. Why AISI E-1 Part VII Chairs are Better
) : The height must be sufficient to distribute the load to the shell without overstressing it. A recommended range is often between 6 and 33 inches, depending on the application.
Compare AISI standards to or API methods for tank design.
The document AISI E-1, Volume II, Part VII, "Anchor Bolt Chairs"