What is the Crank Length of Reinforcement

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 & the minimum length of crank 300 mm.

 

 

Crank length of reinforcement

 

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

Concrete Test: Slump test, compression test, split tensile test, soundness etc.

d1 =diameter of smaller bar

d2 = diameter of largest bar

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