Simplified Design for Columns - Simplified Design of Reinforced Concrete Buildings - page 151

2400

[ ]

( )

P n(max) 0.80 A g 0.85f c '

+ρ g f y −

0.85f c '

φ = φ

2200

φ= 0.65
f c ' = 4000 psi

f y = 60,000 psi

2000

1800

1600

1400

1200

1000

800

600

400

200

0

1 2 3 4 5 6 7 8

ρ g = A st /A g , %

Figure 5-2 Design Chart for Nonslender, Square Tied Columns