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Bolt Pattern Group Pullout Excel Spreadsheet Calculator

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Bolt Pattern Group Pullout Excel Spreadsheet Calculator

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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.
Force per Turn-of-the-Nut

SHEAR FRICTION CONNECTION -- PUNCHING SHEAR UBC 1911.7
Force per Lateral Movement
SHEAR FRICTION CONNECTION -- Strength of Bolt
SHEAR FRICTION CONNECTION -- Base Plate Sliding / Shear Plane
Punching Shear
SHEAR FRICTION CONNECTION -- Bearing Against Anchor Plate
ANCHORAGE TO CONCRETE, Tension -- Fully Encased Bolt UBC 1923.2
ANCHORAGE TO CONCRETE, Tension -- Fully Encased Bolts in a Row UBC 1923.2
ANCHORAGE TO CONCRETE, Tension -- Fully Encased Group of Bolts UBC 1923.2
ANCHORAGE TO CONCRETE, Shear -- Fully Encased Bolt UBC 1923.3.3