Let us estimate the volume of materials in the brick masonry water tank as shown below.
Given data:
Size of the tank = 5.5 ft. × 3.5 ft.
Depth of the tank = 3.25 ft.
Masonry wall thickness = 9" = 0.75 ft.
The volume of the tank
= L × B × H
= 5.5 ft. × 3.5 ft. × 3.25 ft.
= 62.56 cu ft.
= 1771 liters.
( As 1 cu ft. = 28.315 liters.)
Now let us calculate the vol. & qty. of different items in the water tank.
1. Excavation:
The volume of excavation for the tank
= [L × B × H]
= [ 8 ft. × 6 ft. ×2.25 ft.]
= 108 cu ft.
2. Rubble soling:
The volume of rubble soling
= [L × B × H]
= [8 ft. × 6 ft. × 0.75 ft.]
= 36 cu ft.
3. Bed PCC:
The volume of bed PCC
= [L × B × H]
= [8 ft. × 6 ft. × 0.5 ft.]
= 24 cu ft.
4. Brick masonry:
Let us calculate the masonry vol. by the longwall & short wall method.
The vol. of brick masonry
= [(2nos. × vol. of longwall) + (2nos. × vol. of the short wall)]
= [ ( 2nos. × L × T × H of longwall) + ( 2nos. × L × T × H of a short wall )]
= [ ( 2nos. × 7 ft. × 0.75 ft. × 4 ft.) + ( 2nos. × 3.5 ft. × 0.75 ft. × 4 ft. )]
= [ ( 42 cu ft. ) + ( 21 cu ft. )]
= 63 cu ft.
5. Plastering:
Let us make internal & external plaster in a 1:4 ratio having 12mm. thickness.
5a. Internal plaster:
The vol. of internal plaster
= [(2nos. × vol. of longwall plaster) + (2nos. × vol. of the short wall plaster)]
= [ ( 2nos. × L × T × H of longwall plaster) + ( 2nos. × L × T × H of a short wall plaster ) ]
= [ ( 2nos. × 7 ft. × 0.039 ft. × 3.25 ft.) + ( 2nos. × 3.5 ft. × 0.039 ft. × 3.25 ft. )]
( 12mm. = 0.039 ft.)
= [ ( 1.7745 cu ft. ) + ( 0.887 cu ft. )]
= 2.662 cu ft.
5b. Top surface & internal base plaster:
The vol. of top & base plaster
= [ ( L × W × T of top masonry surface) + ( L × W × T of base plaster )]
Here, L = [(2nos. × 8 ft.) + (2 nos. × 3.5 ft.)] = 23 ft.
= [ ( 23 ft. × 0.75 ft. × 0.039 ) + ( 5.5 ft. × 3.5 ft. × 0.039 )]
= [( 0.67cu ft.) + ( 0.75 cu ft. )]
= 1.42 cu ft.
5c. External plaster:
The vol. of external plaster
= [ ( 2nos. × L × T × H of longwall plaster) + ( 2nos. × L × T × H of a short wall plaster ) ]
= [ ( 2nos. × 8 ft. × 0.039 ft. × 4 ft.) + ( 2nos. × 5 ft. × 0.039 ft. × 4 ft. )]
( 12mm. = 0.039 ft.)
= [ ( 2.496 cu ft. ) + ( 1.56 cu ft. )]
= 4.056 cu ft.
The total vol. of plaster
= [ 5a. + 5b. + 5c.]
= [ 2.662 cu ft. + 1.42 cu ft. +4.056 cu ft.]
= 8.138 cu ft.
Continued 👉 Cost estimation of the brick masonry water tank. ( PART-2)
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Thank you for going through these calculation steps❤. Have a good day 😄.
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