Category: TEMPORARY STRUCTURES

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 22.6.1 Uses of Underpinning Underpinning techniques are adopted under the following situations: 22.6.2 Precautionary Measures Before Underpinning The following general measures…

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 Installation of Shoring Following are the points to be kept in view while installing shoring: Types of Shoring Shorings are classified under the following categories: 1. Racking…

In the routine construction work, sometimes it is necessary to have some temporary structure or support to continue the work. When the height of construction exceeds about 1.5 m, temporary structures are needed. Temporary structure is erected close to the work so as to provide a safe working platform for the workers and to provide…

Under no circumstance the forms are removed until the concrete has hardened sufficiently. Under normal weather conditions, the concrete is left in place as long as possible up to a maximum of 28 days. Figure 22.2 Formwork for square column Figure 22.3 Formwork for beam and slab However, the period to which the concrete should be left…

Concrete initially is in a plastic state and has to be kept within an closure of a desired shape by proper temporary supports till it gains adequate strength. This temporary enclosure is known as formwork or shuttering or simply as forms. For circular works such as arches, doors, etc., the term centring is used generally instead of formwork…

Temporary supporting structures are those structures which are required in the routine building construction works or repair works. During the process of concreting work, temporary structures called formworks are needed till the concrete attains its full strength. Similarly for laying of masonry work, plastering, painting and for temporary repair, some temporary structures are used which…