Why steel is not deducted from concrete?

Why steel is not deducted from concrete?

In small structures the steel volume is negligible in comparision to concrete. So generally this is avoided. But in large and heavy reinforced structures like bridges, Dam spillway, cantilever retaining walls equivalent steel volume is deducted from concrete volume while paying contractor’s bill.

What is the steel quantity required in slab?

Thumb rule for Steel required for RCC slab is 80 kgs/m3, then quantity of steel required for 100 sq ft ( 0.944 m3) rcc slab is equal to = 80 × 0.944 = 75.5 Kgs.

How do you subtract steel from concrete?

Incase we are not given the number and/or dia of steel bars but only the \% of steel, p t . Then, total area of steel in the member = p t *b*d/100, where b and d are its breadth and effective depth. In order to deduct steel we simply subtract the total area of steel from the gross cross section area of the member.

How do you deduct reinforcement volume in concrete?

First you have to know the quantity of steel you are using suppose if you are casting 100m^3 slab with a steel of 15 Tons.. As 1 M^3= 7850kg . Based on that if you are using 15 Tons steel then you have to deduct 2M^3 of concrete volume.

Why is Steel not calculated in volume?

While casting the RCC structures, the unaccounted wastage of the concrete will be somewhere around 3\%, i.e. above the percentage volume of the steel. So, neglecting the steel volume became the standardized practice in the concrete volume calculation for the general purpose.

What is the percentage of Steel in concrete?

5) Thumb Rule for Steel in slab is 1\% – 1.5\% of wet volume of concrete.

How much steel is required for 1m3 concrete in slab?

Maximum quantity of steel required for 1m3 concrete slab is 1.5\%, now 1.5\% of 1m3 = 0.015m3, and we know that 1m3 steel weight is 7850 Kg, so weight of 0.015m3 steel = 0.015 × 7850 = 118 kg, so maximum quantity of steel required for 1m3 concrete slab is 118 Kg.

How do you calculate volume of Steel in concrete?

Calculate Steel quantity in slab as 1\% of volume of concrete = 0.01× 7850× 1= 78.50kg:- according to using Thumb Rule Steel quantity required for RCC slab should be 1\% of total volume of concrete, here steel density = 7850 kg/m3, so quantity of steel in 1m3 of concrete slab = 0.01× 7850× 1= 78.50kg, so, therefore 78.50 …

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How to compute number of steel bars in a slab?

Compute number of steel bars. Main Steel Bars No. of bars= (Slab length (L)/spacing)+1 Equation 1 Shrinkage and Temperature Steel Bars No. of bars= (Slab length (S)/spacing)+1 Equation 2 In equation 1, center to center spacing of main reinforcement steel bars are used and shrinkage and temperature bar spacing is used in equation 2.

How do you calculate the amount of steel in a column?

Achieve column size and reinforcement detailing from design drawings. Then, compute quantity of steel in the column using the following steps: Compute total length of longitudinal bars which equal to the column height plus laps for footing multiply number of longitudinal bars. Convert that length into kilograms or Tons.

How do you find the inclined length of a concrete slab?

Inclined length can found from the following expression: Inclined length= 0.45D Equation 5 D=slab thickness-2*concrete cover-bar diameter Equation 6 3. Convert that length into kilograms or tons because steel bars are ordered by weight.

How to calculate net volume of concrete?

We know that concrete have also Steel bar in column, for the calculation of Net volume of concrete we should subtract volume of Steel bar from dry volume to get net volume. ● Now your turns :- if you are happy to see this post ,so please guys like comment and share to your friends and any query and questions about this post are most welcome.