|
|
|
|
|
Moisture and temperature settings are found in the Service Conditions data group, and apply to all walls on the structure, as it is quite rare for them to be anything but dry moisture conditions and temperature conditions less than 100 degrees F for shear wall design. If you need to apply wet or unseasoned moisture conditions or high temperatures to only part of the structure it will be necessary to run the design twice, once for each part of the structure.
Moisture Conditions
If the Deflection Analysis setting in the Design Procedures group is not activated then the choices are < 19% or >= 19% moisture content for each of in-service and at time of fabrication. if Deflection Analysis is activated, then the program allows you to enter the precise moisture content percentage.
The program applies the wet service factors from the Withdrawal Loads section of NDS Table 11.3.3 to the nail withdrawal calculations for C&C design, i.e. a 0.25 factor if only one of fabrication or in-service conditions are > 19%. If both are dry or both are wet, a 1.0 factor is used. These factors are shown in the Components and Cladding design results table.
For deflection analysis, the moisture content is used to calculate the shrinkage component of hold-down displacement. The length subject to shrinkage, as input for each level in Structure Input view, is multiplied by .002 x the difference in fabrication and in-service moisture content percentage.
Temperature Conditions
You can choose from the three temperature ranges in NDS Table 11.3.4, and the program applies the appropriate factor to nail withdrawal strengths for C&C design, also taking into account your choice for in-service moisture conditions, This factor are shown in the C&C design results table.