Cast-in-Situ Manhole Material Quantity
a — inner length
(cm)
b — inner width
(cm)
c — bottom slab length
(cm)
d — bottom slab width
(cm)
h — inner height
(cm)
k — top slab thickness
(cm)
r — bottom slab thickness
(cm)
t — wall thickness
(cm)
Blinding gap
(cm)
Blinding thickness
(cm)
Update Calculation
