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Engineering & Construction

Rebar Development Length Calculator

Multiply a bar diameter by the development multiple you enter. Change the multiple to match the drawing. This is not a code check.

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This runs entirely in your browser. Nothing you type is sent to a server.

How to use the Rebar Development Length Calculator

  1. 1Enter the bar diameter in millimetres.
  2. 2Enter the multiple of diameter from the drawing, or a planning figure you are testing.
  3. 3Read the length in millimetres and metres.

Questions

Does this follow a design code?

No. It multiplies the diameter by the number you type. Bond, cover, hooks and bar position are not calculated.

What is the starting multiple?

40. Replace it with the figure on your drawing.

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