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Service Conditions

These settings are found in the Moisture Conditions data group. The conditions apply to all walls on the structure, as it is quite rare for them to be anything but dry moisture conditions for shear wall design. If you need to apply wet moisture conditions to only part of the structure, then it will be necessary to run the design twice, once for each part of the structure.

If Deflection Analysis is not activated then the choices are Wet (>19%) or Dry (<=19%) in-service conditions, and Dry(<=15%) or Green (>15%) fabrication condition. If Deflection Analysis is activated, then the program allows you to enter the precise moisture content percentage.

The program applies the service condition KSF factors service factors from CSA O86 Table 12.1. The lateral load factors are used in the equations in O86 11.6.2 for shear design, the withdrawal load factors are applied to nail withdrawal strengths for C&C design.

These factors are shown in the C&C design results table for nail withdrawal design, and in the legend to the shear results table for shear design.

For deflection analysis, this is used to calculate the shrinkage component of hold-down displacement, via the length subject to shrinkage, as input for each level in Structure Input view multiplied by .002 x difference in fabrication and in-service moisture content percentage as input in the Design Settings.

See Also

Design Settings

Design Procedures

Forces Based On...

Shear Wall Rigidity

Ignore Non-wood-panel Contribution

Same Materials on Shear Line

Shear Line Offsets

Linearize Deflection Equation

Height for Wind Classification

Always Use DF Plywood Specific Gravity