Development Length of Straight Bar in Tension
ACI 318-14
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f'c:
ksi
fy:
ksi
ψt:
1.0
1.3
Table 25.4.2.4: 1.3 if more than 12" freash concrete casted below horizontal bars; 1.0 otherwise
ψe:
1.0
1.2
1.5
Table 25.4.2.4: 1.0 for uncoated bars
cb:
Lesser of: (a) the distance from center of a bar or wire to nearest concrete surface, and (b) one-half the center-to-center spacing of bars or wires being developed
Ktr:
Simplification per 25.4.2.3
Excess Steel:
25.4.10.1
ld Min:
inch
25.4.2.1(b)
Calculate
