Expert Guide
Steel / Rebar Calculators
Lap Length Calculator – Rebar Splicing
Quality Inspector
Find the safe lap length for reinforcement bars to ensure continuity of stress transfer between spliced bars.
📐 Formula & Method
Lap length is typically expressed as a multiple of the bar diameter (D). Standard practice is 50D for tension and 40D for compression.
Lap Length = Diameter × Multiplier (e.g., 50)
📋 Worked Example
For a 12mm bar in tension (50D): • Lap Length = 12 × 50 = 600 mm
❓ Frequently Asked Questions
It is the overlap provided between two reinforcement bars when the required length exceeds the manufactured length (12m).
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