Harga T Beam 40m Panjang, Post Tensioned Prestressed Beam.. Susah juga nak lihat dan nak cari harga T Beam untuk bina jambatan. Biasalah kebanyakan kontraktor tak mahu dedahkan harga mereka pada umum. Namun ramai juga yang tak tahu dan ingin tahun kos pembinaan T Beam. Harganya sekitar RM50,000 hingga RM70,000 mengikut lokasi.
T beam di buat di tapak. Dalam tender ia meliputi kos strands,prestressing,launching,grouting and anchorages all in accordance with spec and drawing. Item BQ dinamakan
Post Tensioned Prestressed Beam
Menggunakan konkrit grade 40/20 dengan harga RM300 per M3.
Principle of Prestressing
The function of prestressing is to place the concrete structure under
compression in those regions where load causes tensile stress. Tension
caused by the load will first have to cancel the compression induced by
the prestressing before it can crack the concrete. Figure 1.2 (a) shows a
plainly reinforced concrete simple-span beam and fixed cantilever beam
cracked under applied load. Figure 1.2(b) shows the same unloaded beams
with prestressing forces applied by stressing high strength tendons. By
placing the prestressing low in the simple-span beam and high in the
cantilever beam, compression is induced in the tension zones; creating
upward camber.
Figure 1.2(c) shows the two prestressed beams after loads have been
applied. The loads cause both the simple-span beam and cantilever beam
to deflect down, creating tensile stresses in the bottom of the
simple-span beam and top of the cantilever beam. The Bridge Designer
balances the effects of load and prestressing in such a way that tension
from the loading is compensated by compression induced by the
prestressing. Tension is eliminated under the combination of the two and
tension cracks are prevented. Also, construction materials (concrete
and steel) are used more efficiently; optimizing materials, construction
effort and cost.
