Engineering & Construction
Rebar Lap Length Calculator
Multiply a bar diameter by the lap multiple you choose. The multiple is your assumption. The tool does not check a design code.
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This runs entirely in your browser. Nothing you type is sent to a server.
How to use the Rebar Lap Length Calculator
- 1Enter the bar diameter.
- 2Enter the multiple. People often try 40d or 50d while planning.
- 3Use the multiple written on the drawing when you have it.
Questions
Which multiple should I use?
The one on the structural drawing. A blank planning guess is not a splice design.
What does 50d mean for a 16 mm bar?
50 × 16 mm = 800 mm.