The document provides an example of calculating quantities of work items like brickwork, plastering, and flooring for a building using the centre line method. The wall length and thickness are used to calculate the centre line length which is then multiplied by the width and depth to find the brickwork quantity. The total quantities are calculated and deductions are made for openings like doors and windows to find the net quantities of each work item like brickwork, plastering and flooring.

1. SESSION: 03 CENTRE LINE METHOD
Example:
2. Find out quantities of following items of work
i. Superstructure brick work ii. Plastering iii. Flooring
Wall thick-0.3 m
Procedure:
Calculate the centre line length of the wall, and then multiply it with the breadth and depth
of the wall to find out quantity.
= 6.3 x 4 = 25.2 m
Example:
Measurement sheet:
Sr.no.
Work description Unit No’s Length Width Height/Depth Quantity Total
Quantity
1.0 Brick work M3 1 25.2 0.3 2.8 11.088 21.2
Deduction
i. Door M3 1 1.5 0.3 2.1 0.945 -3.105
ii. Window M3 6 1.2 0.3 1.0 2.16
19.686

2. 2.0 Plastering work
All four side walls M2 4 6.0 2.8 67.2 67.2
Deduction
iii. Door M2 1 1.5 2.1 3.15 -10.35
iv. Window M2 6 1.2 1.0 7.2
56.85
3.0 Flooring work
M2 1 6 6 36 36