IBC/UBC Seismic & Lateral Design Excel Sheet: Free Download
Free Excel sheet for IBC and UBC 1997 seismic lateral design. Covers base shear (UBC and IBC), Ca/Cv coefficients, near-source Na/Nv factors, storey force distribution, R factors, and drift checks. Includes a complete worked example for a 6-storey building in Seismic Zone 4.
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