Three Shearwall Design Methods
1. segmented
2. force transfer around openings
3. perforated
methods 2 & 3
- FBD of entire wall, including openings
- only wood structural panels allowed
- must be fully sheathed
Force Transfer Around Openings
IBC section 2305.4 and 2305.5
SDPWS section 4.3.5.2
fewer hold-downs, but special detailing
- assumed to overturn as a unit
- coupling beams above/below openings
- carry shear forces (sheathing, additional edge nailing)
- flexural continuity at each end (framing, strapping & blocking)
"rational analysis" - having its source in or being guided by the intellect (as distinguished from experience or emotion) source
Perforated
IBC section 2305.3
SDPWS section 4.3.5.3
only 2 hold-downs, no special detailing, but reduced capacity
varying degrees of overturning resistance along length
