The length of the lap in compression member is kept greater than bar diameter x $\frac{P e r m i s s i b l e s t r e s s i n b a r}{F i v e t i m e s t h e b o n d s t r e s s}$ or

- 1
  
  12 bar diameters
- 2
  
  18 bar diameters
- 3
  
  24 bar diameters
- 4
  
  30 bar diameters

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