Reinforced
Loadbearing vertical structural component for one or more stories. Made with or without corbels.
 Criteria
 Concrete f´_{c} = 5000 psi.
 Reinforcement f_{y} = 60,000 psi.
 Curves shown for full development of reinforcement.
 Horizontal portion of curve is the maximum for tied columns: 0.80ΦP_{o}.
 Φ = 0.9 for ΦP_{n} = 0
 Φ = 0.7 for ΦP_{n} ≥ 0.10f´ _{c}A_{g}
 (varies from 0.9 to 0.7 for points between)
 Use of Curves
 Enter at left with applied factors axial load, P_{u}.
 Enter at bottom with applied magnified factored moment, δ M_{u}.
 Intersection point must be to the left of the curve that indicates required reinforcement.
12 x 12
14 x 14
16 x 16
18 x 18
20 x 20
24 x 24
