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Rebar (short for reinforcement bar or reinforcing bar), known when massed as reinforcing steel or steel reinforcement, [1] is a tension device added to concrete to form reinforced concrete and reinforced masonry structures to strengthen and aid the concrete under tension.
As a result, the concrete and spacers will bond without gaps. Often these spacers are manufactured from extruded fiber-reinforced concrete which improves crack resistance. [3] Concrete spacers and bar support help maintain material integrity and uniformity of the concrete, and provide a cover over the reinforcement that protects against corrosion.
Ability to be prefabricated. Unbonded tendons can be readily prefabricated off-site complete with end-anchorages, facilitating faster installation during construction. Additional lead time may need to be allowed for this fabrication process. Improved site productivity. The elimination of the post-stressing grouting process required in bonded ...
A prefabricated building, informally a prefab, is a building that is manufactured and constructed using prefabrication. It consists of factory-made components or units that are transported and assembled on-site to form the complete building.
"Loren" Iron House, at Old Gippstown in Moe, Australia. Prefabrication has been used since ancient times. For example, it is claimed that the world's oldest known engineered roadway, the Sweet Track constructed in England around 3800 BC, employed prefabricated timber sections brought to the site rather than assembled on-site.
Prefabricated concrete slabs are built in a factory and transported to the site, ready to be lowered into place between steel or concrete beams. They may be pre-stressed (in the factory), post-stressed (on site), or unstressed. [10] It is vital that the wall supporting structure is built to the correct dimensions, or the slabs may not fit.
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