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# 18.10.4 *Shear Strength*

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*V*of structural walls shall not exceed:

_{n}(18.10.4.1) |

where the coefficient **α _{c}** is 3.0 for

**, is 2.0 for**

*h*/_{w}*ℓ*≤ 1.5_{w}**, and varies linearly between 3.0 and 2.0 for**

*h*/_{w}*ℓ*≥ 2.0_{w}**between 1.5 and 2.0.**

*h*/_{w}*ℓ*_{w}In 18.10.4.1, the value of ratio

**used to calculate***h*/_{w}*ℓ*_{w}**for segments of a wall shall be the greater of the ratios for the entire wall and the segment of wall considered.***V*_{n}Walls shall have distributed shear reinforcement in two orthogonal directions in the plane of the wall. If

**does not exceed 2.0, reinforcement ratio***h*/_{w}*ℓ*_{w}**ρ**shall be at least the reinforcement ratio_{ℓ}**ρ**._{t}For all vertical wall segments sharing a common lateral force,

**shall not be taken greater than , where***V*_{n}**is the gross area of concrete bounded by web thickness and length of section. For any one of the individual vertical wall segments,***A*_{cv}**shall not be taken greater than , where***V*_{n}**is the area of concrete section of the individual vertical wall segment considered.***A*_{cw}For horizontal wall segments and coupling beams,

**shall not be taken greater than , where***V*_{n}**is the area of concrete section of a horizontal wall segment or coupling beam.***A*_{cw}### Related Code Sections

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