Moment Connection Design Calculator
Check bolted moment connection capacity per AISC including bolt shear, required bolt count, end plate thickness, and pass/fail adequacy.
Inputs
kip-ft
in
Results
Bolts Required
9
Single Bolt Shear Capacity30.67 kips
Flange Force266.67 kips
Bolts Provided8
End Plate Thickness (est.)3 in
Demand/Capacity Ratio1.09
Connection Adequate0
How to Use This Calculator
- Enter the factored beam moment demand in kip-ft from your LRFD structural analysis.
- Select the bolt diameter in inches (3/4, 7/8, or 1 in are most common) and bolt grade (1=A325, 2=A490).
- Enter the number of bolt rows in the end plate connection (2 bolts per row).
- Read Bolts Required and compare to Bolts Provided to confirm the connection is adequate.
- Check Connection Adequate (1=Pass, 0=Fail) and Demand/Capacity Ratio — ratios above 1.0 require redesign.
- Use End Plate Thickness (est.) as a starting point; verify with full AISC Design Guide 4 or 16 calculations.
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