Slab Reinforcement Calculation : Easy Method

  • What is Slab or R.C.C Slab?

Slab: The flat plates that are made of R.C.C. or C.C. are called slabs or floor slab.



  • Overall R.C.C. Floor-slab can be divided into the following categories. Such as

  1.  One Way Slab
  2. Two Way Slab
  3.  Flat Slab
  4. Ribbed Slab
  5. R.B. Slab 
  • What is Flat Slab?

Flat Slab: Concrete Floor Slabs that supply loads directly on the column, called flat slabs. 

Slab Reinforcement Calculation

Suppose,

Slab length = 50 feet.

And, Slab width = 40 feet.

10mm rods have been used at all the roofs.

Main and crank bar = 10 mm dia. @ 5 “c / c.

Extra top (in roof slab) = 2 nos. 10 mm dia.

Extra Top (outside the roof slab) = 1 nos. 10 mm dia.



Slab Reinforcement Calculation
fig-1: Slab Reinforcement

Slab Reinforcement calculation:

40 feet rod required:

Slab length = 50 feet = 50 x 12 = 600 inches.

If using a rod in a 5 inch gap = 600/ 5 = 120 Nos. rod required.

So, Rod needs to = 120 x 40 = 4800 feet.

50 feet rod required:

Slab Width = 40 feet = 40 x 12 = 480 inches.

If using a rod in a 5 inch gap = 480 / 5 = 96 Nos. rod required.

So, Rod needs to = 96 x 50 = 4800 feet.

Extra Top rod required :

For extra-top, the number of rods can be taken at any one direction (length or width).

So, Extra-top = 4800 feet.



So, the total rod requirement is: (4800 + 4800 + 4800) = 14400 feet.

So, the total weight of the rod = { (14400 x 0.62) / 3.28} = 2722 kg.

( 1 meter length, 10 mm Rod weight = 0.62 kg)

( 1 meter = 3.28 feet)

So, slab requires 2722 kg rod.

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