4.where should we provide extra bars in beams

Question

Accepted Answer

Extra bars in beams should be provided at locations of high bending moments or where additional reinforcement is required.

Extra bars should be provided at supports and near the mid-span of the beam where bending moments are highest.
Additional reinforcement may be required at locations where concentrated loads or point loads are applied.
Extra bars should also be provided at locations where there are openings or cutouts in the beam.
In seismic zones, extra bars should be provided to enhance the beam's resistance to lateral forces.
The need for extra bars can be determined through structural analysis and design calculations.

Accepted Answer

Extra top bar (end support) = 0.2 l from face of support + 50 d
Extra top bar (mid support) = 0.2 l from face of support to both end + width of support or column
Extra bottom bar (at mid span) = l - 0.1 l x 2
where,
l = clear span between support. and, d = dia. of bar
Thanks

Accepted Answer

Top side then L/4 middle

Accepted Answer

Top extra bars have to be provided near suppourts

Bottom extra bats have to be provided in the middle of beam.

Accepted Answer

To increase tensile strength

Remove negative moment

Accepted Answer

Resist tensile stresses due to bending in beams

4.where should we provide extra bars in beams

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