Standard Shear Walls - The Analysis of Irregular Shaped Structures - page 338

F i g u r e 9.8 Summing shear capacities.
1. Walls sheathed with the same construction and materials applied to both sides
of the same wall shall be permitted to be taken as twice the nominal unit shear
capacity for an equivalent shear wall sheathed on one side.
2. For shear walls sheathed with dissimilar materials applied to opposite sides of
the wall, the combined nominal unit shear capacity shall be either two times
the smaller shear capacity or the capacity of the stronger side, whichever is
greater.
Exception : When wind controls the design, the combined shear capacity of shear walls
sheathed with a combination of wood structural panels, hardboard panel siding, or
structural fiberboard sheathing on one side of the wall and gypsum wallboard on the
opposite side shall equal the sum of the sheathing capacities of each side.
3. The shear values for sheathing of different materials applied to the same face of
the wall are not cumulative.
4. The nominal shear capacity for shear walls in the same line sheathed with the
same materials and construction shall be permitted to be combined if the
induced shear load is distributed so as to provide the same deflection in each
wall. Summing shear capacities of dissimilar materials applied to the same wall
line is not allowed.
5. For seismic design of shear walls sheathed with the same construction and
materials on opposite sides of a shear wall, the shear wall deflection shall be