How to calculate staircase shuttering dimensions manually by using simple formula.  

1) T-255mm R-160
West slab thk x 0.289
2) T-260 R-160
West Slab THK x 0.283
3) T-300mm R-170 mm
West Slab THK x 0.264
4) T- 300mm R-167.5mm
West slab THK x 0.260
5) T-300 R-160mm
West slab THK X 0.250
6) T-300 R-151.72
West Slab THK X 0.240
7) T-300 R-141
West Slab THK X 0.230
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