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Base Shear due to Manual Building Masses on North-South Lines (Bug 2518)

When a building mass is manually added to a North-south shearline, the seismic load from the resulting mass did not contribute to base shear on the structure, creating lower-than-expected forces distributed to the building levels. However, the seismic load from the building mass is created, using the base shear computed without the contribution of that load. Furthermore, when any seismic load is entered manually, it is not included in the base shear to be distributed to the rest of the building. This is not incorrect, but has been made more evident to the user via a note beneath the seismic information table and in the log file.

See Also

Load Generation

External Pressure Coefficients for Wall Loads (Bug 2595)

External Pressure Coefficient for Leeward Roofs (Bug 2596)

Low Rise Wind Loads Due to Note 8 for Positive CpCg Coefficients (Bug 2550)* corrected for Canadian references and terminology

MWF Wind Loads All-heights Coefficients in Log File (Bug 2501)

All-heights Co-efficients for Walls Extending Between Blocks (Bug 2473)