StrucLab
| Project | — | Job No. | — |
| Calculation | Rebar Development Length & Lap Splice | By | — |
| Reference | AS 3600:2018 Cl 13.1.2, 13.2.2 | Date | 6 June 2026 |
Development Length & Laps
AS 3600:2018 Cl 13.1.2 / 13.2.2 · Deformed bar in tension — basic length, hook/cog, lap splice
600Lsy.t — tension dev. length (mm)
750Lap splice Lsy.t.lap (mm)
300Hook/cog end (0.5 Lsy.t) (mm)
Calculation
Values rounded up to 5 mm for detailing. AS 3600 Cl 13.1.2.2.
| k1 (bar position) | 1.0 | Other |
| k2 = (132 − db)/100 | 1.120 | db = 20 mm |
| k3 = 1 − 0.15(cd − db)/db | 0.850 | 0.7 ≤ k3 ≤ 1.0 |
| Lsy.tb (basic) | 600 mm | main equation governs |
| Lsy.t (tension) | 600 mm | no modifiers |
| Hook / cog end | 300 mm | 0.5 × Lsy.t (Cl 13.1.2.6) |
| Lap splice (tension) | 750 mm | k7 = 1.25 (Cl 13.2.2) |