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Confined Masonry
What is Confined Masonry
Confined masonry is a construction technique that has given good results with regard to earthquake resistance. It is well suited to the needs of small-scale contractors and self-builders constructing low-rise buildings.
It uses the same building materials (concrete, steel, bricks or cement blocks) as the more common Reinforced Concrete (RC) Moment Frame structures but in a different sequence, making it a simpler and safer construction technique for one and two storey buildings.
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In fact, with the Confined Masonry system walls are built first and the (tie)-columns and (tie)-beams are cast in a second step to confine and secure the walls against horizontal forces.
Though the end-result looks very similar to RC frame structures, the mechanical behaviour of confined masonry is quite different: the vertical and (earthquake induced) horizontal loads are dealt with by solid and simple confined walls rather than by the slender RC moment frames and their all important but sensitive hinges.
The solidity and simplicity allows for the confined masonry system to be more forgiving to construction deficiencies such as imprecise steel reinforcement or low quality concrete which are major issues in places with limited machinery and an insufficiently trained workforce.
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Additional information can be found on the Confined Masonry Network site.