**What’s the quantity of steel, cement and sand for 1100 sqft area of an RCC roof? **1100 sq ft concrete slab cost in india and rcc. calculate quantity of sariya, sand cement and aggregate in roof slab. And also know about construction cost of RCC slab of 1100 square feet

1100 sq ft concrete slab cost in india and rcc. Construction cost of RCC slab for 1100 square feet and 1100 sq ft concrete slab cost in india and for the roof cast of 1100 square feet building roof slab, you have require Steel bar ,sand, cement and aggregate.

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What’s the quantity of steel, cement and sand for 1100 sqft area of an RCC roof?, quantity of cement, sand, Steel bar and aggregate required ,you know that for the casting of roof slab we used M20 mix concrete.1100 sq ft concrete slab cost in india and rcc

**Construction cost of RCC slab of 1100 square feet**

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 cement, sand and aggregate is 1: 1.5 :3

**M20 mix Ratio** is 1 : 1.5 : 3 in which one part is cement 1. 5 part is sand and 3 part is aggregate and

Total proportion = 1+1.5+3=5.5

Part of cement = 1/5.5

Part of sand = 1.5/5.5

Part of aggregate = 3/5.5

**Steel required for 1100 sq ft slab**

Steel bar calculation in roof slab reinforcement we provide there is a two types of Steel bar used main bar and cross bar. And know about roof slab Steel calculation

1) **Main bar**:- main bar is also called as shortist span bar usually used at bottom of slab having spacing 4 inch between the two bar.

**Main bar** is also called tension Steel because it is provided in tension zone of roof slab in bottom having tensile strength of steel is enough yield strength and ultimate tensile strength.

We should use hi tensile steel in main bar Fe550D. sufficient amount of main bar used in shorter direction having 10 mm or 12 mm dia of Steel bar according to roof slab reinforcement.

2) **Cross bar**:- cross bar is also called as longer span bar or distribution bar or cross bar mainly used at top of the main bar in compression zone of slab, cross bar usually dia of 8mm or 10 mm bar Steel bar used in longer direction according to roof slab reinforcement.

**Roof slab casting** is process of laying And putting concrete mix in horizontal direction and structure over brickwork. Cast of roof slab reinforcement main bar and cross bar in distributed over shuttering areas of roof slab and then we put concrete mix of M20 or m25 grade of concrete that is known as roof slab casting.

**Given dimensions** of roof slab thickness ranging between 4 inch to 6 inch but in this calculation we take roof slab thickness is 5 inch

Roof slab thickness =5″

Length of slab =44′

Breadth of slab=25′

Area of slab =25’×44’=1100 sqft

M -20 -mix =1:1.5:3 (concrete)

**Volume Calculation of concrete**

1) **wet volume** = Area × thicknessof slab

Wet volume of concrete = 1100 sqft× 5″

Wet volume = 1100sqft × 5/12′

**Wet volume = 458.33 cft**

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

1m3 =35.3147 cft

Wet volume = 458.33 /35.3147=12.98 m3

2) **Dry volume of concrete**

we know that wet volume have voids and pore which filled with water and bubbles it can be remove by vibrator or compressor machine so more quantity of material is required.

dry volume means mixture of cement sand and aggregates concrete in dry condition have more voids and pores that are evaporated in wet condition and volume is decrease by 54 percent in wet condition and volume of dry concrete in increased by 54% , so we can multiply 1.54 in wet volume to calculate dry volume

Dry volume =1.54 × 12.98 m3

**Dry volume of concrete = 19.98 m3**

**Roof slab steel calculation** and 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 of steel = 0.75%of dry volume × density of steel

Density of steel is=7850 kg/m3

Weight = 0.75/100× 19.98m3 ×7850kg/m3

Weight = 1177 kg =1.177 tons

**Weight of Steel bar is require for 1100 square feet Roof slab= 1177 Kg**

1177 Kg Steel required for roof casting of 1100 sq ft rcc slab

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

total cost of Steel bar =1177 × rs 60

Total cost = Rs 70600

**Sand required for 1100 sq ft slab**

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 ×19.98 ×35.3147 cft

Volume of sand =192.43 cft

**192.43 cft volume of sand required for roof casting of 1100 sq ft rcc slab.**

If market rate of 60 rupees per CFT then total cost of quantity of sand

Total cost = rs 60 × 192.43 = rs 11546

**Cement required for 1100 sq ft slab**

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=1440 kg/m3

Weight of cement =1/5.5 × 19.98 m3 ×1440 kg/m3

Weight of cement = 5231 Kg

1 bag cement =50kg

No.of bags = 5231/50

Cement bags =104.62

**104.62 number of cement bag required for roof casting of 1100 sq ft RCC slab**

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

Total cost = 105 ×rs 350

Total cost of cement = Rs 36750

**Aggregate required for 1100 sq ft slab**

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 ×19.98×35.3147 cft

Volume of aggregate = 385 cft

**385 cft volume of aggregate is required for Roof casting of 1100 sq ft RCC slab.**

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

Total cost = rs 70 × 385

Total cost of aggregate = rs 26950

**Total construction cost of 1100 sq ft rcc slab**

● total cost of material:-

Cost of steel = rs 70600

Cost of cement = rs 36750

Cost of sand = rs 11546

Cost of stone = rs 26950

Labour charge and machine cost = rs 50000 (approx)

Total cost = Rs 195846

**1100 sq ft concrete slab cost in India is rs 195846**

Steel 1177 Kg, Cement 105 bags, sand 192.43 cft and Aggregate 385 cft material are required for roof casting of 1100 sq ft rcc slab.

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