What is crank Length of reinforcement

Crank is a slight bending in bars at the lap so that maintains the clear cover even at the lap position. The rule that is generally practiced is that the slope of crank 1:10 & minimum length of crank 300 mm.
Crank length of reinforcement

Crank length of reinforcement

Formula of Crank length = (d1+d2+5)*10mm



d1 =diameter of smaller bar                d2
= diameter of largest bar




  1. Alfonso Sincioco Jr February 13, 2017
  2. TamilSelvan.S August 14, 2017
  3. Dipuna Patra July 15, 2018

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