# Shear Wall Reinforcement Limits.

Longitudinal and Transverse reinforcement limits are controlled automatically.

**International Design Codes**

* ACI 318-19 : *Shear Wall Reinforcement Limits

* TSC 2018 : *Shearwall web Reinforcement Limits

**Notation in ACI 318-19**

* A_{cv } = *gross area of concrete section bounded by web thickness and length of section in the direction of shear force considered in the case of walls, and gross area of concrete section in the case of diaphrams. Gross area is total area of defined section minus area of any openings, in.

^{2}

*specified compressive strength of concrete, psi*

**f**_{c}^{'}_{ }=

**√f**_{c}‘*square root of specified compressive strength of concrete, psi*

**=***specified yield strength for nonprestressed reinforcement, psi*

**f**_{y }=*specified yield strength of transverse reinforcement, psi*

**f**_{yt }=

**h**_{w}**=**height of entire wall from base to top, or clear height of wall segment or wall pier considered, in.

**l**_{w }**=**length of entire wall, or length of wall segment or wall pier considered in direction of shear force, in.

**M**_{u}**factored moment at section, in.-lb**

_{ }=*nominal shear strength, lb*

**V**_{n }=*factored shear force at section, lb*

**V**_{u }=*coefficient defining the relative contribution of concrete strength to nominal wall shear strength*

**α**_{c }=*strength reduction factor*

**ϕ =***= modification factor to reflect the reduced mechanical properties of lightweight concrete relative to normal weight concrete of the same compressive strength*

**λ***= ratio of area of distributed longitudinal reinforcement to gross concrete area perpendicular to that reinforcement*

**ρ**_{l }*= ratio of area of distributed transverse reinforcement to gross concrete area perpendicular to that reinforcement*

**ρ**_{t }**Next Topic**