
Walls = where width or breadth > 2.0m, Columns were Width and Breadth <2.0m 

C_Struc = 
Column 
Unitless 
(Wall = 1, Column = 1.5) , Concrete Stucture Type 
C1 = 
1.5 

Coeffcient dependant on size & shape of formwork 
C_Type= 
Retarded 
unitless 
(Normal = 0.3, Retarded = 0.45, Heavily Retarded=0.6) Cement Type 
C2 = 
0.45 

Coefficent dependant on the constituent of Concrete 









D 
25 
kN/m³ 
Weight Density of Concrete 


h 
9.05 
m 
Vertical Pour Height 



H 
9.05 
m 
Vertical Form Height 



R 
1 
m/hr 
rate at which the concrete rises vertically up the form 
T 
12.5 
°C 
Concrete Temperature ( Not Ambient Temp) 

K 
1.60 
Unitless 
(36/T+16)², Temp Coeffcient 











Cira 108 Provisions 






When C1 R > H, the fluid pressure (Dh) Should be taken as the design pressure 














P1 = 
1.5 
m 

H = 
9.05 
m 
Vertical Form Height 












Pd1 = 
Pressure is, D[C1√R+C2K√(H (C1√R)]) 

Design Pressure = 86.82 kN/m² 









Pd1 = 
86.82 
kN/m² 
Calculated Pressure 
 The Design Pressure is the smallest between the two calculated values 
Pd2 = 
226.25 
kN/m² 
Dh, Pressure 

Hz= 
3.47 
m 
Height of Hydrostatic Zone 

