Section 26.5.1.1
Included code sections - item a.
Excluded code sections - item b.
The 0.85bd/fy criterion is implemented
b is taken the core width (see "Concrete "Core" Determination"). If the core width is zero (there is no core), then b is taken as the width of the section.
Post-tensioning is ignored.
This provision is applied to beams only.
The provisions of item b (Maximum reinforcement) are not considered.
User defined reinforcement that is at an angle to the cross section will only have the component perpendicular to the cross section considered.