Construction cost of RCC slab of 1000 sq ft

How to calculate construction cost of RCC slab of 1000 square feet and also calculate quantity of sariya, sand ,cement and aggregate in roof slab

Description:– construction cost of RCC slab  for 1000 square feet ,for the roof cast of 1000 square feet building roof slab, you have require Steel bar ,sand, cement and aggregate ,how we calculate quantity of cement, sand, Steel bar and aggregate required ,you know that for the casting of roof slab we used M20 mix concrete.

Construction cost of RCC slab 1000 square feet
Construction cost of RCC slab of 1000 square feet

Roof slab

●M-20 mix Concrete:-
In M20 mix concrete M is stand for mix and numerical figure 20 is stand for characteristic of compressive strength 20N/mm2 after mixing and casting of roof slab, quantity of material in slab formation it calculated by M20 mix in which ratio of sand cement and aggregate is 1: 1.5 :3

●M-mix Ratio :-1 : 1.5 : 3 in which one part is cement 1. 5 part is sand and 3 part is aggregate

Steel bar calculation:- In roof slab there is a two types of Steel bar used main bar and cross bar:-
1) Main bar:- it is also called as shortist span bar usually used at bottom of slab having spacing 4 inch between the two bar, main bar used in shorter direction having 10 mm dia of Steel bar.
2) Cross bar:- it is also called as longer span bar or distribution bar mainly used at top of the main bar, cross bar usually dia of 8mm Steel bar used in longer direction.

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How to calculate material required for roof cast of 1000 square feet building

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#How to calculate weight of square shaped Steel bar

Given dimensions:-
Thickness of slab=5″
Length of slab =40′
Breadth of slab=25′
Area of slab =25’×40’=1000sqft
M -20 -mix =1:1.5:3 (concrete)

Construction cost of RCC slab of 1000 square feet
Construction cost of RCC slab of 1000 square feet

Roof slab

●Volume Calculation:-
1) wet volume=Area × thicknessof slab
Vw= 1000 sqft× 5′
Vw= 1000sqft×5/12′
Vw =416.66 cft
If you want to convert it into cubic metre you should divide by 35.3147
1m3 =35.3147 cft
Wet volume=416.66/35.3147=11.80 m3

2) Dry volume:- we know that wet volume have water and bubbles it can be remove by vibrator or compressor machine so more quantity of material is required hence dry volume is increased by 54 percent of wet volume , so we can multiply 1.54 in wet volume to calculate dry volume

Vd =1.54 ×11.80 m3
Dry volume=18.17 m3

●Weight calculation of Steel:- quantity of steel required in roof slab is about 0.5℅ to 1% of dry volume then average is 0.75% of dry volume

Weight =0.75%of dry volume×density of steel
Density of steel is=7850 kg/m3

W =0.75/100×18.17m3 ×7850kg/m3
Weight=1070 kg=1.070 ton

So  weight of Steel bar is require for 1000 square feet Roof slab= 1070kg
If Market rate of steel bar is 60 rupees per kg then

total cost of Steel bar =1070×rs 60
Total cost= Rs 64200

●Sand Calculation:-

In M20 ratio of sand cement and aggregate is 1:1.5:3 ,in this ratio 1.5 part is sand
Total proportion =1+1.5+3=5.5

Volume of sand in cft
Volume =1.5 /5.5×18.17×35.3147 cft

Volume of sand =174.80 cft
If market rate of 80 rupees per CFT then total cost of quantity of sand

Total cost =rs80×174.80
=Rs 13984

●Cement calculation:- in M20 mix 1 part is cement quantity

Weight of cement=1/5.5×dry volume in m3×density of cement
Density of cement=1450kg/m3

Weight =1/5.5×18.17 m3×1450 kg/m3
=4750 Kg
1 bag cement =50kg
No.of bags =4750/50
=95 Bags cement
If market rate of cement is 350 rupees per bags then total cost

Total cost =95 ×rs 350

= Rs 33250

●Aggregate Calculation:- in M20 mix there is 3 part of aggregate quantity

Volume of aggregate=3/5.5×dry volume in CFT
Volume =3/5.5×18.17×35.3147 cft

Volume =349.60 cft

If market rate of aggregate is is 70 rupees per CFT then total cost of aggregate

Total cost =rs 70×349.60
Rs=rs 24472

total cost of material:-
Cost of steel=rs 64200
Cost of cement=rs 33250
Cost of sand=rs 13984
Cost of stone=rs 24472
Labour charge and machine cost =rs 50000 (approx)
Total cost=Rs 184906

Hence total cost of roof slab of 1000 square feet building require rs 184906

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