What Is Centre Line Method:-
The center line method is suitable for wall cross sections. and the center line method the total length of centre line should be multiplying with breadth and depth of the any wall than it will give us the total quantity at the same time. and each length wall length should be measure to center line of the wall.
To fine out the quantity of wall or any construction building. And this method ( Centre line ) is useful for walls with equivalent cross sections. In order to obtain the total quantity instantly, the total centre line length is multiplied with breadth and depth of relevant item. When cross walls or partitions or verandah walls are attached with main wall, the length of the centre line decreases by half of breadth for each junction. Such junction or joints are analyzed cautiously at the time of estimating total centre line length.
Given Figure for one Room Quantity by Centre line Method.
First of all we have to fine out the total centre line length for the above figure.
Total centre line Length = 5.3 +5.3 + 3.3 +3.3 ( Thickness of the wall is 0.3 meter = 30 cm)
Total Center line length = ?
Now Quantity of Excavation
Volume of Excavation = Total Centre line length x Breadth of Foundation x Depth of Foundation
Volume of Excavation = ?
Quantity of concrete in foundation = Total Centre line length x Breadth of Foundation x Depth of concrete.
Quantity of concrete in foundation = ?
Quantity of bricks in foundation = Total Centre line length x Breadth of Foundation x ( Total depth of foundation – concrete depth)
Quantity of bricks in foundation =?
Quantity of D.P.C = Total Centre line length x Breadth of Foundation x thickness of D.P.C suppose (25mm)
Quantity of D.P.C = ?
Quantity of plinth beam = Total Centre line length x
Breadth of the beam x Depth of beam
Quantity of plinth beam = ?
Brick work in super structure = Total centre line length x breadth of wall x height of wall
Brick work in super structure = ?
Quantity of wall plaster for 2 sides = Total centre line length x height of wall x thickness of plaster
Quantity of wall plaster for 2 sides = ?
Quantity of Paint for 2 sides of wall = Total centre line length x height of wall x 2 = Area of paint in sft ( multiply 2 for wall 2 sides of wall.
We have two kind of wall in the figure > Long wall and short wall
Separate Wall Method Long Wall = 5.3 +5.3 = 10.5 meters
Separate wall Method Short Wall = 3.3 +3.3 = 6.6 meters.
Note: The centre line method is the one of the best method to find out the building quantity. and this method is used at the construction site. therefore we have to learn the centre line method with long wall and short wall method. with this method we can find out the exact quantity of any construction building.