Bolt Group Pullout Design And Calculation Spreadsheet

This design uses the anchor bolt to clamp the steel baseplate down onto the concrete slab/foundation. After grouting beneath the base plate, the bolt is tensioned by tightening the nut, usually about 1/4 turn of the nut.

Lateral loads are converted to bolt tension loads via the concept of shear friction. Bolt lateral capability is factored down with the factors λ and µ which account for a steel plate trying to slide on concrete.