Distribution reinforcement is given to deal with shrinkage stress and temperature effects. As the concrete is weak in tension, to take care of these tensile force distribution, reinforcement is given.27 Jul 2020
Why top bars are provided in slab?
Cranked bars / Bent up bars are provided on top of the reinforcement to resist negative bending moment/Hogging at the supports of the slab. To resist the shear force at the supports. To reduce the risk of a brittle failure of slab-column connection.21 Oct 2019
Why distribution reinforcement is provided in one way slab?
As the slab is inflexibly fixed at the ends, this shrinkage will be limited by the support, which will prompt liable tensile stress in the slab. As the concrete is weak in tension, to take care of these tensile force distribution, reinforcement is given.27 Jul 2020
What is main reinforcement and distribution reinforcement?
Main Reinforcement Bars are used to transfer the bending moment developed at the bottom of the slab. Distribution Bars are used to hold the slabs on either way and to resist the cracks and shear stress developed at the top.
What is distribution steel?
distribution-bar reinforcement, distribution steel In a reinforced concrete slab, small-diameter steel reinforcing bars, usually at right angles to the main reinforcement; intended to spread a concentrated load on the slab and to prevent cracking.
What is main reinforcement function?
Function of Main Reinforcement Bars In order to transfer that bending moment developed at the bottom of the slab, Main reinforcement bar is to provide at the shorter span direction. The purpose of the main bar is to transfer the bending load developed at the bottom of the slab to the beams.
What is main bar in beam?
The purpose of the main bar is to transfer the bending load developed at the bottom of the slab to the beams. We discussed the difference between one way and two way slabs. In one way slab, the slab is supported at two parallel sides where main reinforcement will be placed.
What is main bar in column?
The reinforcement bars that are placed in the tension zone of the slab to resist the bending moment & to transfer the superimposed loads to the supports that are provided for the slab are called main bars.24 Jan 2021
What is top bar in slab?
TOP Bar : Top bar acts as reinforcement which provides strength against flexular moment. It also act reinforcement for compression load which is induced on the top side of beam. Bottom bar : Bottom bar provide strength for tensile load that is induced in lower portion of beam.
How do you calculate distribution bar?
- Given data: Length = 5 m (5000 mm)
- Solution: The quantity is done into two steps.
- Formula: = (Total length clear cover)/center to center spacing + 1.
- Main bar: = (5000 (25+25))/100 + 1.
- Distribution bar: = (2000 ( 25 + 25))/125 + 1.
- Cutting Length.
- Cutting Length:
- Distribution Bar:
How do you calculate the number of bars in a slab?
- (Calculation of Bars No's) First, calculate the number of bars required (main and distribution both). FORMULA = (Total length Clear cover)/center to center spacing + 1. Main bar = (5000 (25+25))/100 + 1.
- (Cutting length) MAIN BAR: FORMULA = (L) + (2 x Ld) + (1 x 0.42D) (2 x 1d)
How is cutting length of slab bar calculated?
Consider, We have a length of 4.5 m and a slab thickness of 150 mm and a bar diameter of 12 mm and a has the clear cover of 25 mm and a develop length of 45 d. D = Height of the bend bar. Ø Cutting Length = 5677.92 mm or 5.677 m. So for the above-given data, you need to cut the main bars 5.67 m in length.25 Oct 2020