In retaining and breast walls, weep holes are provided at

- 1
  
  50 cm vertical height and 50 cm centre to centre horizontally
- 2
  
  100 cm vertical height and 100 cm centre to centre horizontally
- 3
  
  100 cm vertical height and 120 cm centre to centre horizontally
- 4
  
  120 cm vertical height and 100 cm centre to centre horizontally

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