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# 11.5.4 *In-Plane Shear*

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*V*shall be calculated in accordance with 11.5.4.2 through 11.5.4.8. Alternatively, for walls with

_{n}**, it shall be permitted to design for in-plane shear in accordance with the strut-and-tie method of Chapter 23. In all cases, reinforcement shall satisfy the limits of 11.6, 11.7.2, and 11.7.3.**

*h*≤ 2_{w}*ℓ*_{w}For in-plane shear design,

**is thickness of wall and***h***shall be taken equal to***d***0.8**. A larger value of*ℓ*_{w}**, equal to the distance from extreme compression fiber to center of force of all reinforcement in tension, shall be permitted if the center of tension is calculated by a strain compatibility analysis.***d**V*at any horizontal section shall not exceed .

_{n}*V*shall be calculated by:

_{n}V = _{n}V+ _{c}V_{s} | (11.5.4.4) |

It shall be permitted to calculate

**in accordance with Table 11.5.4.6, where***V*_{c}**is positive for compression and negative for tension, and the quantity***N*_{u}**is expressed in psi.***N*/_{u}*A*_{g}**Table 11.5.4.6— V_{c}: nonprestressed and prestressed walls**

Calculation option | Axial force | V_{c} |
||
---|---|---|---|---|

Simplified | Compression | (a) | ||

Tension | Greater of: | (b) | ||

0 | (c) | |||

Detailed | Tension or compression | Lesser of: | (d) | |

Equation shall not apply if ( M/_{u}V— _{u}ℓ/2) is negative._{w} |
(e) |

Sections located closer to wall base than a distance

**or one-half the wall height, whichever is less, shall be permitted to be designed for***ℓ*/2_{w}**calculated using the detailed calculation options in Table 11.5.4.6 at a distance above the base of***V*_{c}**or one-half the wall height, whichever is less.***ℓ*/2_{w}### Related Code Sections

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