Cost and quantity calculation for RCC slab of 2 dismil

Cost and quantity calculation for RCC slab of 2 dismil and How to calculate total cost and material required for roof cast of 2 dismil building and also know about cost and quantity calculation for RCC slab per square foot

 for the roof cast of 2 dismil = 870 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.

Cost and quantity calculation for RCC slab
Cost and quantity calculation for RCC slab

 

Quantity of cement sand and steel bar and aggregate required for roof slab
Cost and quantity calculation for RCC slab per square foot
Roof slab

 

 M-20 mix grade of 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

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

Quantity of steel calculation for RCC slab

 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.

 Given dimensions:-

        Thickness of slab=5″

Quantity of cement sand Steel bar and aggregate required for roof slab
Concrete calculation for slab
Roof slab

 

        Area of slab = 870 sqft

      M -20 -mix =1:1.5:3 (concrete)

 ●Volume Calculation:- 

   1) wet volume=Area × thicknessof slab

     Vw= 870sqft× 5′

    Vw= 870sqft×5/12′

    Vw =361.92cft

     If you want to convert it into cubic metre you should divide by 35.3147

   1m3 =35.3147 cft

   Wet volume=361.92/35.3147=10.86 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 ×10.86 m3

   Dry volume=16.724m3

 Weight calculation of Steel for slab

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 =0.75/100×16.724m3 ×7850kg/m3

     Weight=984.625kg

 So  weight of Steel bar is require for 870 square feet Roof slab= 984.624kg

 If Market rate of steel bar is 60 rupees per kg then

 total cost of Steel bar =984.62×rs 60

    Total cost= Rs 59077

 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 /5.5×16.724×35.3147 cft

    Volume of sand =161 cft

If market rate of 80 rupees per CFT then total cost of quantity of sand

 Total cost =rs80×161

                =Rs 12880

 ●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 =1/5.5×16.724 m3×1450 kg/m3         =4400Kg

1 bag cement =50kg

No.of bags =4400/50

                    =88 Bags cement

If market rate of cement is 350 rupees per bags then total cost

  Total cost =88 ×rs 350

   = Rs 30863

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

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

Volume =3/5.5×16.724×35.3147 cft

 Volume =322cft

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

 Total cost =rs 70×322

           Rs=rs22550

 total cost of material:-

   Cost of steel=rs 59077

Cost of cement=rs 30863

Cost of sand=rs 12880

Cost of stone=rs 22550

Labour charge and machine cost =rs 43500(approx)

 Total cost=Rs 168876

 Hence total cost of roof slab of 2400 square feet building require rs 434915

 ●Now your turn:-  please like and comment it above this post, if you have any query and question about this please you will ask, thanks a”lot.

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