# One-Way Slab Reinforcement Limits

A minimum area of flexural reinforcement, A

_{s,min}is controlled and reported automatically.

A minimum area of shear reinforcement, A

_{v,min }is determined automatically according to**9.6.3.4**.

The ratio of deformed shrinkage and temperature reinforcement area to gross concrete area are greater than or equal to 0.0018. It’s controlled automatically.

The spacing of deformed shrinkage and temperature reinforcement does not exceed the lesser of 5h and 18 in. It’s controlled automatically.

**Symbols**

**A _{ps} = **area of nonprestressed and prestressed longitudinal tension reinforcement, in.2

**A**area of shear reinforcement within spacing s, in.2

_{v}=**A**minimum area of shear reinforcement within spacing s, in.2

_{v,min}=**b**web width or diameter of circular section, in.

_{w}=**d =**distance from extreme compression fiber to centroid of longitudinal tension reinforcement, in.

**f**specified compressive strength of concrete, psi

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

_{c}^{‘}=**f**specified yield strength for nonprestressed reinforcement, psi

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

_{yt}=**h =**overall thickness, height, or depth of member, in.

**s =**center-to-center spacing transverse reinforcement, in

**f**specified tensile strength of reinforcement, psi

_{pu}=**Minimum flexural reinforcement in nonprestressed slabs**

A minimum area of flexural reinforcement, A_{s,min} is controlled automatically. Minimum flexural reinforcement is the same as shrinkage and temperature in **24.4.3.2**. In difference with shrinkage and temperature reinforcement, flexural reinforcement should be placed as close as the face of the concrete in tension due to applied loads.

**A _{s,min} =0.0018A_{g}**

According to **24.4.3.2**, the ratio of deformed shrinkage and temperature reinforcement area to gross concrete area is determined as greater than or equal to 0.0018.

**Minimum shear reinforcement**

A minimum area of shear reinforcement, A_{v,min } is determined where V_{u}>ΦV_{c}. Shear reinforcement area is determined according to 9.6.3.4. Detailed information: Reinforced Concrete Beam Design per ACI 318-19 and Beam Reinforcement Limits

**Minimum shrinkage and temperature reinforcement**

Shrinkage and temperature reinforcement is determined according to **24.4**.

The ratio of deformed shrinkage and temperature reinforcement area to gross concrete area are greater than or equal to 0.0018.

The spacing of deformed shrinkage and temperature reinforcement does not exceed the lesser of 5h and 18 in.