Section 18.8.2 Minimum Bonded Reinforcement

The minimum bonded reinforcement is provided in accordance with the following table.

Member Type	Tensile Stress, $σ \leq 0.5 λ \sqrt{{f^{'}}_{c}}$		Tensile Stress, $σ > 0.5 λ \sqrt{{f^{'}}_{c}}$
	Type of Tendon		Type of Tendon
	Bonded	Unbonded	Bonded	Unbonded
Beam	0	0.004A	0.003A	0.005A
One-way Slab	0	0.003A	0.002A	0.004A
Two-way negative moment regions	0	0.006hl_n	0.0045hl_n	0.0075hl_n
Two-way positive moment regions $> 0.2 λ \sqrt{{f^{'}}_{c}}$	0	0.004A	0.003A	0.005A
Two-way positive moment regions $< 0.2 λ \sqrt{{f^{'}}_{c}}$	0	0	n/a	n/a

For sections with multiple concrete strengths, the minimum concrete strength is used to determine the limiting stress.

For sections with multiple concrete strengths, approximate extreme fiber stresses and centroid stresses are reported.