Section 7.12 Shrinkage and Temperature Reinforcement
7.12.2.1 and 7.12.2.2 are implemented
The gross area of concrete after taking into account the "ignore top depth" and the "ignore bottom depth" is used to determine the reinforcement specified in 7.12.2.1.
For members that contain rebar with different yield stresses, the ratios of 7.12.2.1(a) or 7.12.2.1(c) will be satisfied for whichever provides the least amount of reinforcement. In the calculation of 7.12.2.1(c) only reinforcement with fy = 60,000 psi will be used in the calculation.
Ratio is limited to a lower bound of 0.0014 in accordance with 7.12.2.1
The specified bar size is used to determine the required reinforcement for satisfying the maximum spacing in 7.12.2.2. The number of bars is not rounded up to the next whole number in this calculation, but will be rounded up to the next whole number in the reinforcement summary. User defined bars are counted toward satisfying the maximum spacing requirements. Bars at an angle to the cross section consider the sum of their vector components divided by the gross area of one bar as the total number of provided bars for spacing calculations.
For the "elevated slab" and "mat foundation" minimum reinforcement patterns, an inflection point ratio of 0.2113 is assumed.
