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Q. Prepare Rate analysis for a PCC work (1:3:6). Sol n .:- Given: - Concrete grade = M10 (1:3:6) Take = 10m 3 volume for PCC Add 52% extra for voids to get dry vol m . of Concrete. Volume of dry concrete = 1.52×10 = 15.2 m 3 Quantity of cement = (15.2/(1+3+6) ) ×1 ...
In Centre
line method, the length of Centre line is calculated & it is used for
calculating the quantities of different items. In this method, the length will
remain same for excavation in foundation, for concrete in foundation, for all
footings & for superstructure. This method is simple & rapid, but it
needs special attention & consideration at the junctions, meeting points of
the cross or partition walls etc. This method is quite simple for rectangular,
circular & polygonal buildings having no inner or cross walls.
1. Prepare
the foundation plan of given drawing write the Centre line length of each wall
in.
2. Find the
total length of Centre line of all walls.
3. Calculate
the number of junctions of cross walls each should be noted that corners of
building where two walls meet are not taken in junction & if two walls meet
at same point take n = 2 at the point.
4. For an
item calculation of length is done as below-
Length of an item = total Centre line length – n × (½ × width of
item)where
n = no. of junctions
5. Multiply
no., length, width, & depth/height to get quantity of an item.
Q. Prepare Rate analysis for a PCC work (1:3:6). Sol n .:- Given: - Concrete grade = M10 (1:3:6) Take = 10m 3 volume for PCC Add 52% extra for voids to get dry vol m . of Concrete. Volume of dry concrete = 1.52×10 = 15.2 m 3 Quantity of cement = (15.2/(1+3+6) ) ×1 ...
Long Wall &Short Wall or 'Out-to-Out and In-to-In' Method In this method, the longer walls in a building are taken as long walls & calculated from out-to-out & the partition or shorter walls which make the right angle with the long walls are taken as short walls and are calculated from in-to-in for a particular layer of work. To calculate the quantities multiplying the lengths of long & short walls by the breadth & the height of wall. These lengths of long and short walls differ in each layer of footing. PROCEDURE:- 1. Prepare the foundation plan shown in fig. with all dimensions. Centre-to-Centre dimensions are taken out by adding half width of each cross wall to inner dimension of room. 2. Now divide the walls into two groups. In plan, walls in the horizontal direction are called Long walls & vertical direction walls are called Short walls & Vice-Versa. 3. Measure the length of long wall for an item by using formula- Length ...
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