Calculation of Supplemental Reinforcement Per 4.3.4.3(c)
The calculation of supplemental reinforcement per 4.3.4.3(c) is as follows:
Stress Difference = Actual Stress - Supplemental Reinforcement Limit Stress
As = Act [(Stress Difference) / (400 N/mm2)]
where Act = cross-sectional area of the concrete in the tension zone
User defined reinforcement that is at an angle to the cross section will only have the component perpendicular to the cross section considered.