tension · shear · bearing · tearout · slip · ASD + LRFD

Bolt capacity (ASD/LRFD)

Quick ASD and LRFD values for a single bolt — for preliminary connection sizing and field checks. Coefficients from AISC's Basic Design Values card (ANSI/AISC 360-22).

Formula & assumptions

Coefficients per AISC Basic Design Values (ANSI/AISC 360-22): tension 0.38/0.56 F_ub A_b, shear 0.23/0.34 F_ub A_b per plane (×1.25 for X), bearing 1.2/1.8 d t F_u, tearout 0.6/0.9 l_c t F_u, slip resistance 0.12/0.18 F_ub A_b (Class A, STD holes, per slip plane). Does not check spacing, edge distance, block shear, or hole-type multipliers (Class B, OVS/SSL/LSL) - see AISC Specification Chapter J. Bolt capacity governs by the lesser of bearing and tearout. Single-bolt values only — does not sum a bolt group and does not select bolt size or grade.

Verify with project engineer, contract documents, and applicable code/specification. Preliminary/field-reference values only — not a substitute for a licensed engineer’s design. Does not check bolt spacing, edge distance, block shear, prying action, weld access holes, ply-thickness limits, or any other requirement of a complete connection design — see AISC Specification Chapter J.

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