Rebar Lap Splice Calculator for 20mm Grade 60 Rebar
Formula
L_d = (0.02 × d_b × f_y) / sqrt(f_c') × lap factor
Governing Standard
ACI 318, BS 8110
Required Inputs
- Rebar diameter d_b (mm)
- Yield strength f_y (MPa)
- Concrete strength f_c' (MPa)
- Lap splice class (A/B/C)
Output
Required lap splice length (mm)
Notes
For 20mm Grade 60 rebar in 30 MPa concrete, Class B lap splice requires approximately 600mm. The lap factor depends on the stress level: Class A (1.0), Class B (1.3), Class C (1.5).
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