Answer / 1986

development length
1. The minimum length of straight reinforcing bar or
reinforcing rod which is required to anchor it in concrete.
2. The length of embedded reinforcement required to develop
the design strength at a critical section.

Answer / aung

3. stirrups are provided for shear
shear is greater in near support than decrease to center

Answer / saurabh raval

2)Extras are provided on top to compensate hogging moment
ie. to compensate or counter negative bending moment.At
bottom, to compensate sagging moment ie. to come out of
positive bending moment.
3)Stirrups are provided for the purpose of shear stresses.
At ends of the beam, shear stresses are more that is why at
ends, stirrups are provided nearer and at center of the
beam, shear stresses are less compare to ends, therefore at
center of the beam, stirrups are provided at larger space,
compare to ends of the beam.
4)Column is completely & totally a compression member.Upper
part of the beam is a compression member and lower half(or
lower remaining part ie. as per the design) of the beam is a
tension member.

Answer / dharmadas adhikary

Adding with answer 3 of Mr. Saurav Raval - Hogging moment
occours at support thats why we provide extra top at
support & Sagging moment ocours at mid span thats why we
provide extra bottom at mid span.

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