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The shoring contemplates the construction of a temporary safety structure to support the walls of a building that has become unstable due to either the foundational expansion or a natural disaster. The type of shoring is chosen by the contractor and will depend on the structural condition of a concrete building and the circumstances surrounding the building’s weakness.
Bracing columns
This shoring technique deploys columns or scaffolding tubes, with a slope from the floor to the top of the wall and with support from the other side. These originate from a base plate embedded in the floor and go upwards to join a wall plate bolted into the structure near the ceiling. They should be at a 45 degree angle, although an inclination of up to 75 degrees is also acceptable. They must also be secured at intervals with supports that are bolted on wall studs. Experts advise not to use construction wedges to connect the tubes for seat plates, because the wedges can fail if the building vibrates or there are tremors.
Shoring underway
This method uses props that do not touch the ground but extend into the air across the width of the walls you are propping up. The bracing technique is centred on horizontal support or on struts located between the walls, fixed to the wall plates and supported by a network of shorter needles or bundles and steel construction blocks. The slanted struts, in addition, are prepared on the wall plates and angled upward to the horizontal strut to provide additional strength. The slanted struts get additional support of needles in the upper straps and in tight straps, in the lower part.
Dead shoring
These struts offer vertical support for roofs and floors. The method is designed to organize a system of beams and poles that can both support the weight of a building and transfer weight to the ground. The builders install dead bracing by drilling holes in the walls and inserting the vertical beams to prop up the previous structure. The dead struts, which are vertical struts, are prepared for a base plate in the ground and the needles are fixed horizontally towards the top of the dead struts. Builders should leave enough distance between these and the walls so that workers can pass through.
What underpinning to use?
All types of shoring are suitable for supporting walls that protrude or crack and need repairs. The shoring method combinations also work when an adjacent structure requires demolition or when the openings in the walls are being cut. The horizontal flying struts are ideal for supporting the walls in two separate buildings when a structure in the middle of the buildings is scheduled for demolition. Dead struts hold roofs and floors when the bottom segment of a wall has been removed to create an opening or rebuild a defective load wall. For greater safety in the wall of cut, some contractors install shoring tubes, in addition to dead struts to reach greater security against the fall of the walls.