Rebar Development Length Calculator
Using ACI 318-14 provisions
| Bar Size | Diameter (in) | Area (in2) | f`c = 4000 psi |
|---|
| TOP BARS | OTHER BARS | COMPRESSION | HOOKED BARS |
|---|
| Ldt (in) | Lbt (in) | Ld (in) | Lb (in) | Ldc (in) | Lbc (in) | Ldh (in) |
|---|
| #3 | 0.375 | 0.11 | 19 (28) | 25 (37) | 15 (22) | 19 (28) | 8 | 12 | 8 |
| #4 | 0.5 | 0.20 | 25 (37) | 33 (49) | 19 (29) | 25 (37) | 10 | 15 | 10 |
| #5 | 0.625 | 0.31 | 31 (47) | 41 (61) | 24 (36) | 31 (47) | 12 | 19 | 12 |
| #6 | 0.75 | 0.44 | 37 (56) | 49 (73) | 29 (43) | 37 (56) | 15 | 23 | 15 |
| #7 | 0.875 | 0.60 | 54 (81) | 71 (106) | 42 (63) | 54 (81) | 17 | 27 | 17 |
| #8 | 1 | 0.79 | 62 (93) | 81 (121) | 48 (72) | 62 (93) | 19 | 30 | 19 |
| #9 | 1.128 | 1.00 | 70 (105) | 91 (136) | 54 (81) | 70 (105) | 22 | 34 | 22 |
| #10 | 1.27 | 1.27 | 79 (118) | 102 (153) | 61 (91) | 79 (118) | 25 | 39 | 25 |
| #11 | 1.41 | 1.56 | 87 (131) | 114 (170) | 67 (101) | 87 (131) | 27 | 43 | 27 |
| #14 | 1.693 | 2.25 | 105 (157) | - | 81 (121) | - | 33 | - | 33 |
| #18 | 2.257 | 4.00 | 140 (209) | - | 108 (161) | - | 43 | - | 43 |