Reinforcement Development Lengths: #14
ACI 318-19 reinforcement development and splice lengths for deformed bars #3 through #18. Includes tension development length ld, compression development length ldc, Class A and B splice lengths, and standard hook development length ldh. Covers f'c = 3000-6000 psi, fy = 60000 and 80000 psi, uncoated and epoxy-coated bars, top and other bars, and normal-weight vs lightweight concrete.
| bar size | condition key | bar area in2 (in2) | bar diameter in (in) | class A splice in (in) | class B splice in (in) | coating | concrete type | fc psi (psi) | fy psi (psi) | hook development ldh in | ld compression in (in) | ld tension in (in) | location | modification factors applicable | notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| #14 | fc3000_fy60000_uncoated_other_normal_weight | 2.25 | 1.693 | 104 | 124 | uncoated | normal_weight | 3,000 | 60,000 | N/A | 37 | 83 | other | psi_t=1.0 psi_e=1.0 psi_g=1.0 psi_s=1.0 lambda=1.0 | ld=(60000)/(20*54.77)*1.693=92.9->93 in typical; CRSI simplified table ~83 in; ldc=max(0.02*60000/54.77*1.693=37.1 30.5)=37.1->38 in; no hook for #14 per 25.4.3.1(c) |
| #14 | fc4000_fy60000_uncoated_other_normal_weight | 2.25 | 1.693 | 90 | 107 | uncoated | normal_weight | 4,000 | 60,000 | N/A | 32 | 72 | other | psi_t=1.0 psi_e=1.0 psi_g=1.0 psi_s=1.0 lambda=1.0 | ld simplified ~72 in; ldc=max(0.02*60000/63.25*1.693=32.2 30.5)=32.2->33 in; No standard hooks for #14 or #18 |
| #14 | fc5000_fy60000_uncoated_other_normal_weight | 2.25 | 1.693 | 80 | 96 | uncoated | normal_weight | 5,000 | 60,000 | N/A | 28 | 64 | other | psi_t=1.0 psi_e=1.0 psi_g=1.0 psi_s=1.0 lambda=1.0 | ld simplified ~64 in; ldc=max(28.8 30.5)=30.5->31 in |
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