Category: Temporary Supporting Structures

Several methods are available for underpinning foundations but four routine methods which are used in general are: 1. Pit Method Generally underpinning by pit method is carried out by excavating slowly in stages. For this the existing wall is divided into suitable width of about 1.20–1.50 m. Holes are made in the existing wall in…

The following general measures should be undertaken before starting the underpinning operations:

Underpinning techniques are adopted under the following situations:

Underpinning is the method of supporting structures while providing new foundations or strengthening the foundation or carrying out repairs and alterations without affecting the stability of the existing structures. Figure 22.12 Dead-shores used for repairs

Shorings are classified under the following categories: 1. Racking or Inclined Shores In the type of shoring inclined members are adopted to provide temporary support to the external walls from the ground. These inclined members are called as rakers. An inclined shore primarily consists of rakers, braces, wall plate, needles and plank. The wall plate…

Following are the points to be kept in view while installing shoring:

Shoring is the means of providing support to get stability of a structure temporarily under certain circumstances during construction, repair or alteration. Such a circumstance may arise when

This type of scaffolding is also referred to as ladder scaffolding. This is a modified form of double scaffolding but steel is used instead of timber. There are patented scaffolds which are readily available in the market with special types of couplings and frames. Here, the working platform is supported on a bracket which can…

In this type of scaffolding steel tubes are used instead of timber. Further 40–50 mm diameter tubes of 5 mm thick are used. These tubes are commercially available in suitable lengths with special couplings and set screws. Although it is strong and suitable it can be used up to a specific height. Figure 22.7 shows…

In this type of scaffolding, the working platforms are supported on tripods, ladders, etc., which are mounted on boggies, wheels or lorries. This is suitable for minor repairs or painting work within a height of 5 m.