Holes are made depending on the type of masonry. Usually varies from 1.2 m to 1.8m center on the wall. A beam called a needle is inserted into these holes, and the needle is supported on both sides of the wall by vertical props at their ends.
These vertical props are also called the dead shoring. The needle can be made of timber or steel material. And the needle is sufficiently supported as required to carry the load above.
The dead shore is fixed to the needle and props position, allowing the workspace to stand on either side of the wall. The props are fixed tightly by a folding wedge at their base. While the junction between the props and the needle is provided strong with the help of dogs.
Before starting the demolition work of the building, all the opening spaces of doors, windows, etc., are fixed by a strut. The load walls of the upper floors and roof are well supported by independent shoring.
After completing the building work, it is advisable to keep the shoring support for at least seven days before dismantling so that the members created for the structure have enough strength to be self-supporting.
The length of the racker can be reduced by introducing a rider racker for high-rise buildings.
The rackers should have an incline on the ground by 45 degrees to work more effectively. However, in practice, the angle can vary from 45 to 75 depending on the wall support. But usually, the top racker is kept below 75 degrees.
The rider should be braced properly at intervals as required.
The size of the rackers should be chosen according to the resistance of the maximum force coming through the walls or structure.
In the shoring system, the centerline of the racker and the wall should be at floor level.
The shoring can be supported at a distance of 3 to 4.5 m to cover a longer length.
The inclination on the sole plate must be properly embedded in the ground. And for that, the soleplate should be used in the right section and size.
Wedges should not be used in shoring sole plates. Because it gives way during vibration.
The centerline of the flying shore and the struts should meet at the floor level of those two buildings.
If the floor level is different, then the horizontal shore should be placed between the two-floor level having equal strength.
The struts should be 45 degrees with a horizontal shore. In any case inclination, this strut is held up to 60 degrees with the horizontal shore.
A single shore should be used up to a distance of 9 meters between the walls of two buildings, and a double shore system should be used when the distance is more than 9 meters.
Flying shore is included when repairs are carried out in an older building. And should be kept in place until the construction of the new unit of the building is completed.