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Casting partly after 2-3 days!

 
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malay.kumar at total-e...
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PostPosted: Sun Feb 01, 2004 4:00 am    Post subject: Casting partly after 2-3 days! Reply with quote

Casting beams or slabs part by part is quite common practice ! For many
reasons it is not always possible to cast the slabs and beams at the same
time. Suppose for instance there are inverted beams (upstand) then in such
cases beams are casted after day or two , after the slab concrete hardens
slightly so that shuttering for the beams are easily placed. Many times
beams are concreted at first phase and the slabs dowels are just left from
the beams .. which are concreted later. In such case the designer must
design the 2'nd phase element for some extra moments.
Suppose the slab is to be cast at phase-II , then in such case dowels from
beams (for the slabs) are to be left during the beam casting , now when you
are concreting the slab at phase II then also one can say that the BEAM-SLAB
element acts as monolithic.
There is absolute no harm in casting structural elements in parts (provided
some extra precautions to be taken for obvious reasons).
Remember One thing , for they who say that it is absolutely necessary to
cast all the structural elements together - please note that then in such
case it is also absolutely necessary to cast the entire building together
which can't be done for obvious reasons ) - Thus we do level by level
casting . When we can cast the Columns step by step why can't we cast other
structural elements ?!?!


Regards
Malay

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