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2106.5.2 Shear Wall Shear Strength
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For a shear wall whose nominal shear strength exceeds the shear corresponding to development of its nominal flexural strength, two shear regions exist.
For all cross sections within a region defined by the base of the shear wall and a plane at a distance Lw above the base of the shear wall, the nominal shear strength shall be determined by Equation 21-1.
Vn = An ρn fy (Equation 21-1)