Dear List Members,
Dear List members,
I am confronted with following problem, if you can guide me, about
the precaution should be taken , I will be grateful.
a. The pre-stressed pre-cast T-beam s of a 44.34m each span bridge,
has six cables made of 12 Numbers 12.5 mm high strength steel strands.
Out of which four cables are pre-stressed before launching and the
remaining two cables are stressed after the girders are placed in
position, and the deck slab is cast.
b. Such pre-stressing is defined as two stage pre-stressing which
becomes essential when the span exceeds 30m for a certain type of
c. After launching of girders and placing of deck slab, it was
revealed that one of the cables duct of second-stage pre-stressing
was choked accidentally.
d. External pre-stressing of an additional cable to compensate for
the original struck cable is the only solution available to us.
C M Iqbal