Post-tensioned (PT) slabs
Post-tensioned (PT) slabs are typically flat
slabs, band beam and slabs or ribbed slabs. PT slabs offer the
thinnest slab type, as concrete is worked to its strengths, mostly
being kept in compression. Longer spans can be achieved due to
prestress, which can be used to counteract deflections.
Post-tensioned slabs use high strength tensioned steel strands
to compress the slabs, keeping the majority of the concrete in
compression. This gives a very efficient structure which minimises
material usages and decreases the economic span range when compared
to reinforced concrete.
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Post-tensioned concrete floors
Concrete frame buildings