How do you calculate the number of steel in a column footing?

How do you calculate the number of steel in a column footing?

N = [(Length of Y-direction footing – 2 x cover)/spacing of steel bar] + 1

1. A = 1200 mm length in X-direction.
2. B = 1200 mm length in Y-direction.
3. C = 50 mm cover of footing.
4. a = 150 mm spacing in X-direction bar.
5. b = 200 mm spacing in Y-direction bar.
6. d = 450 mm depth of footing.
7. D = Length of 90′ bend.

How do you determine how much steel to put into a foundation?

Determine the amount of rebar needed for the footings. Generally, one stick of rebar per 8 inches of footing width will suffice. If your footings are 16 inches wide, you will need to add two sticks of rebar along the width of the footing; however, if your footings are 24 inches wide, you will need three sticks.

How do you calculate steel reinforcement in a column?

Longitudinal steels

1. Compute total length of longitudinal bars which equal to the column height plus laps for footing multiply number of longitudinal bars.
2. Convert that length into kilograms or Tons. This can be done by multiplying cross section area of steel by its total length by density of steel which 7850 kg/m3

How do you calculate footing quantity?

The trapezoidal footing formula is used to determine the volume of a trapezoidal footing from the respective drawing specifications….Example – Calculation Using Trapezoidal Footing Formula

1. A1= A x B = 1.5 x 1.5 = 2.25m.
2. A2 = a x b = 0.8 x 0.8m = . 64m.
3. ht = 0.3m.

How do you calculate footing material?

How to calculate concrete:

1. Determine how thick you want the concrete.
2. Measure the length and width that you’d like to cover.
3. Multiply the length by the width to determine square footage.
4. Convert the thickness from inches to feet.
5. Multiply the thickness in feet by the square footage to determine cubic feet.

How do you calculate concrete footing volume?

Calculating the top surface area and multiplying it with the depth or height of the column.

1. Volume of Concrete = 0.6×0.4×3= 0.72m3
2. Volume of Circular column = πr2 x 3 = 3.14 x 0.252 x3 = 0.58m3
3. Volume of concrete = 1.2x1x0.1 = 0.12m3 Total volume of concrete required for footing= 0.32+0.12=0.44m3

How is slab calculated?

CONCRETE CALCULATOR FORMULA

1. Determine how thick you want the concrete.
2. Measure the length and width that you’d like to cover.
3. Multiply the length by the width to determine square footage.
4. Convert the thickness from inches to feet.
5. Multiply the thickness in feet by the square footage to determine cubic feet.

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 to calculate steel for footing?

Calculate Steel for Footing 1 After that, compute the total length of bars which is equal to the number of required bars multiply by the length of one… 2 Convert that length into kilograms or Tons. This can be done by multiplying cross section area of steel by its total… More

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 calculate the load on a slab?

Assume the slab has a thickness of 125 mm. Now each square meter of the slab would have a self-weight of 0.125 x 1 x 2400 = 300 kg which is equivalent to 3kN. Now, assume the Finishing load to be 1 kN per meter and superimposed live load to be 2 kN per meter. So, we can calculate the slab load to be around 6 to 7 kN per square meter.