Moment Frame Analysis Calculator
Analyze lateral forces on a moment frame using the portal method: column shear, moments, base shear, and drift.
Inputs
kN
bays
ft
ft
stories
Results
Exterior Column Shear
16.67 kN
Total Base Shear
300 kN
Column Moment29.17 kN·m
Beam Moment (interior)58.33 kN·m
Estimated Lateral Drift0.01 mm
How to Use This Calculator
- Enter the number of bays, bay width in feet, and number of stories with story height in feet.
- Input column and beam section properties (moment of inertia) for each member group.
- Set the lateral load distribution in kips per story level.
- Review the Story Drift, Overturning Moment, and Member End Moments.
- Check that story drift ratios are within code limits (typically H/400 for wind, H/200 for seismic).
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