TYPES OF STIRRUPS AND THEIR USES
-->Open stirrups are provided principally to resist shear forces in concrete beams and they are
applied in locations in which the effect of torsion is insignificant.
-->U-shaped stirrups are
placed in the tension side of concrete beams in which shear cracks would occur.
-->Closed shaped stirrups are used
when concrete beams are designed to resist a substantial amount of torsion.
Why is propping given after removal of formwork???
After concreting, the time at which striking of formworks should not be too long, otherwise
it would affect the colour of concreted structures.
For long span concrete structures, when
they have attained sufficient strength to support their self-weight, creep deflection may
occur in these structures if propping is not provided after the removal of formwork.
Therefore, re-propping is carried out after removing formwork and these props should not
be allowed to stand too long because creep loads may overstress them.
--The height of the sink of wash basin above floor level is kept at 75 to 80cm.
--For initial estimate for a beam design, the width is assumed as 1/30th of span
WHAT TYPE OF SLAB IT IS ? AND JUSTIFY YOUR ANSWER
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