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Seismic Base Shear & Lateral Storey Force Calculator
As per IS1893(Part1):2025
Seismic Zone
II
III
IV
V
VI
Return Period
75
175
275
475
975
1275
2475
4975
9975
Site Class
A
B
C
D
E
Importance Factor (I)
Time Period (T)
Response Reduction Factor (R)
Direction
X
Y
Seismic Weight (W)
Analysis Method
Equivalent Static Analysis
Dynamic Analysis-Response Spectrum
Calculate Base Shear
Results
Zone factor
Ah (sa/g)
Horizontal Acc Coeff
Base Shear
Download Output (Excel)
Do you want to calculate Lateral Storey Force?
No
Yes
Storey Heights (Bottom → Top)
Storey Weights (Bottom → Top)
Calculate Lateral Storey Force
Lateral
Force
Export to Excel