Shear Wall Design
Segmented
Shear
Wall
Design 

There are two design methodologies
used for shear walls:
Segmented Design and Perforated Design. The majority of this
tutorial concentrates on the traditional segmented shear wall (SSW) design approach. An introduction to the
perforated design
approach and its benefits
will be presented later in
this tutorial. 

Segmented
Shear Wall Design (SSW) is the traditional design method that has
been used for many years. In the SSW method, walls are divided
into segments of fullheight sheathing. These segments are
typically separated by openings in the wall such as doors and windows.
The lengths of each fullheight sheathing segment (b_{i}) are summed together,
resulting in a conservative estimate of the length of the wall that will resist shear forces.
The fullheight segments are then designed
to resist the applied loads. Holddown connectors (HD) are required at the bottom corners of
each segment to prevent each
segment from overturning.
The following illustrations depict a typical shear wall.
Figure 1 shows that the wall is made up of six sheathing panels,
typically plywood or oriented strand board (OSB), that have been mounted vertically to the
framing members. Holes have been framed into the wall to accommodate a
window and a door. This wall geometry will be used several times
throughout this tutorial. 




Figure 2 illustrates the shear wall divided into fullheight sheathing segments, shown in green. Only the fullheight sheathing segments are assumed to provide resistance to lateral loads. The sheathing grade and thickness and the nail size and spacing determine the shear capacity per foot of length of the fullheight segments. IBC Table 2306.4.1 and UBC Table 23III1 relate these variables so that designers can determine the shear capacity (v) in units of lb/ft (plf) of the fullheight segments. The design shear capacity, V, is found using the following equation:  
V = v Sb_{i} 





Topics of this module include:
Introduction,
Load
Path, UBC
Design Table, Wall
Shear,
Dimension Ratios, Chord
Design, 
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