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Factors Applied to Shear Line Forces

The loads that you input or those that are generated by the wind load generation or seismic load generation processes are assumed to be unfactored (specified) loads. The program applies factors for wind and earthquake loads as it converts applied loads to shear line forces.

Additionally, the program creates forces for deflection and/or story drift analysis that use the serviceabilitycombinations. These forces are not displayed on the plan view or elevation view screens, but are output in the Design Settings table, the Deflection table and Hold-down Displacement table of the Design Results.

The load combination factors applied are

Design

Deflection

Seismic

1.0

1.0

Wind

1.4

1.0

Design Standard reference

NBC 4.1.3.2

O86-14 5.2.4.2

For seismic design, a factor of 1.2 is applied to hold-down design forces (O86 11.8.2 for high seismic zones, and is applied for all seismic design to the design of drag struts (11.8.6)

See Also

Load Distribution to Shear Lines

Diaphragm Flexibility Cases

Rigid Diaphragm Distribution

Flexible Diaphragm Distribution

Torsional Analysis for Flexible Diaphragms