• A minimum area of flexural reinforcement, As,min is controlled and reported automatically.

  • A minimum area of shear reinforcement, Av,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

Aps = area of nonprestressed and prestressed longitudinal tension reinforcement, in.2
Av = area of shear reinforcement within spacing s, in.2
Av,min = minimum area of shear reinforcement within spacing s, in.2
bw = web width or diameter of circular section, in.
d = distance from extreme compression fiber to centroid of longitudinal tension reinforcement, in.
fc' = specified compressive strength of concrete, psi
√fc = square root of specified compressive strength of concrete, psi
fy = specified yield strength for nonprestressed reinforcement, psi
fyt = specified yield strength of transverse reinforcement, psi
h = overall thickness, height, or depth of member, in.
s = center-to-center spacing transverse reinforcement, in
fpu = specified tensile strength of reinforcement, psi


Minimum flexural reinforcement in nonprestressed slabs

A minimum area of flexural reinforcement, As,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.

As,min =0.0018Ag

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, Av,min is determined where Vu>ΦVc. 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.