DIFFERENCE BETWEEN MAIN BARS AND DISTRIBUTTION BARS FOR SLAB

DIFFERENCE BETWEEN MAIN BARS AND DISTRIBUTTION BARS FOR SLAB

      1.    Main reinforcement bar is normally used at the bottom of slab. Distribution bars are placed on      the  top of the main bar.

2    2.  Main bar is used in shorter direction but Distribution bar is used in longer span.

3    3.  Higher dimension bar is used as main reinforcement bar. Lower dimension bar is used as   distribution bars.

      4.  Main reinforcement bar is used to transfer the bending moment to beams. Distribution bars are used to resist the shear stress and cracks developed at the top of the slab.

          
   FUNCTION OF MAIN REINFORCEMENT BARS:

      Main reinforcement bar is provided at the shorter span direction in order to transfer the bending moment developed at the bottom of the slab. The purpose of providing main bar is to transfer the bending load  developed  at the bottom of the slab to the beams.
       

1.  Main reinforcement bar is provided at the bottom of the slab at the shorter direction.

      2.  Stronger dimension bar is used as main bar.