Let us make a boulder soling of 0.75 ft. ( 9") thick for the foundation & plinth.
Vb1= ( 0.75 ft ÷ 2 ft.) × 102 cu ft.
(by volume ratio with excavation)
= 0.375 × 102 cu ft.
= 38.25 cuft.
(by volume ratio with excavation)
= 0.165 × 102 cu ft.
= 16.83 cu ft.
Boulder soling volume for plinth
Vb2 = [(shed length - 2 sides × plinth wall thickness) ×( shed width - 2 sides × wall thickness) × soling depth]
= [ (10 ft - 2 × 0.5 ft.) × (8 ft.- 2× 0.5 ft.) × 0.75 ft. ]
= 9 ft × 7 ft × 0.75 ft.
= 47.25 cu ft.
PCC volume for plinth
Vp2 = 10 ft × 8 ft × 0.33 ft.
( PCC is covered above the plinth masonry )
= 26.4 cu ft.
1. The volume of muroom (construction soil ) filled in the plinth
= 9 ft × 7 ft.× 0.25 ft.
= 15.75 cu ft.
2. The total volume of the boulder soling for the shed
= Vb1 + Vb2
= 38.25 cu ft. + 47.25 cu ft.
= 85.5 cu ft.
3. The total volume of the PCC for the shed
= Vp1 + Vp2
= 16.83 cu ft. + 26.4 cu ft.
= 43.23 cu ft.
Let us make PCC in the 1:2:4 mix.
Quantity of cement bags required for PCC
= 17.942 bags × ( 43.23cu ft ÷ 100 cu ft.)
= 7.75 bags.
The volume of sand required for PCC
= 44 cu ft. × ( 43.23cu ft ÷ 100 cu ft.)
= 19.02 cu ft.
The volume of aggregates required for PCC
= 88 cu ft. × ( 43.23cu ft ÷ 100 cu ft.)
=38.04 cu ft.
Note: The quantity & volume of the materials inserted above are taken from "Calculating the quantity of materials in 100 cu ft. & 1 cum. of M15 (1:2:4 ) grade concrete".
