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Wall lnput View
The following fields in the Framing section of the Wall Input view pertain to hold-downs. They are assumed to apply to all studs in the wall, including those at openings and wall ends (which can be built-up from more than one stud.)
Material and Species
For sawn lumber studs, the selected species will have a species group defined in the WoodWorks database which determine whether hold-down capacity and deflection values are taken from the S-P-F category or Doug-Fir category in the hold-down database. Other species such as Hem-Fir are assigned to S-P-F.
For structural composite lumber studs, such as LVL, the program assigns an equivalent species group according to the specific gravity of the material.
Thickness and Width
In wall input view, the stud thickness (b dimension) and width (d dimension) is input, either by selecting from a list of nominal sections from the database or by typing your own actual value in.
Note that the thickness (b) and width (d) terminology for studs is consistent with product literature, and should not be confused with the width (b) and depth (d) terminology for all members in WoodWorks Sizer.
Wall lnput and Openings Input
The following field is in both the Framing section of the Wall Input view for hold-downs at the wall ends and in the Hold-downs data group in the Opening Input view for the wall studs at the hold-down locations at each side of an opening.
Number of End Studs
Typically wall ends are at least doubled and at times more plies are added to provide tensile or compressive strength or connection strength for the hold-downs. The input of the number of end studs at both left and right end allows the program to select the hold-down capacity and displacement for the end stud pack thickness and depth in the list of records associated with the hold-down in the hold-down database.
The program does not as yet design the built-up studs themselves for tension or compression, however there is compressive design of the bottom plate beneath the stud pack.
This input has is also in the Hold-downs data group in the Opening Input view for the wall studs at the hold-down locations at each side of an opening.