Shoring and Scaffolding Prepared By Alka Shah Civil

Shoring and Scaffolding Prepared By: Alka Shah Civil Engineering

Shoring is the construction of a temporary structure to support temporarily an unsafe structure

Ø SHORING It is the means of providing support to get stability of a structure temporarily under certain circumstances during construction, repair or alteration. Such circumstance arises when 1. The stability of a structure is endangered due to removal of a defective portion of the structure 2. The stability of a structure is endangered due to unequal settlement during construction itself or in long run 3. Certain alterations are to be done in present structure itself. i. e. : remodeling of walls, changing position of windows etc 4. Alterations are carried out in adjacent building for remodeling, strengthening of foundation, etc. 5. Some time to support the form if length of form work is more

Ø Installation of Soring • For shoring timber or steel tubes may be used. Sometimes both are used in combination. If timber is used its surface should be coated with a preservative so as to protect against wet rot. • The shoring should be designed based on the load it has to sustain and duration of load. • Shoring may be given internally or externally depending on the case and in certain cases they may be provided on either side of the wall to produce additional stability. • There is no time limit to which the shoring has to be kept, it may range from weeks to years depending on the case.

Ø Types of Soring 1. Raking or Inclined Shore 2. Flying or Horizontal Shore 3. Dead or Vertical Shore

1. Raking or Inclined Shore • The rakers should place at 45° with ground • Angle of inclination may vary from 45 ° to 75 ° • Top raker should not inclined more then 75 °

2. Flying or Horizontal Shore • It is a system of providing temporary supports to the party walls of the two buildings where the intermediate building is to be pulled down and rebuilt • All types of arrangements of supporting the unsafe structure in which the shores do not reach the ground come under this category

2. Flying or Horizontal Shore Single Flying shore • It is used when maximum distance is up to 9 m

2. Flying or Horizontal Shore Double Flying shore • It is used when distance is 9 to 12 m • After 12 m individual supporting system is required for both walls

3. Dead or Vertical Shore Ø This is the system of shoring which is used to render vertical support to walls and roofs, floors, etc. Ø when the lower part of a wall has been removed for the purpose of providing an opening in the wall Ø to rebuild a defective load bearing wall in a structure Ø The dead shore consists of an arrangement of beams and posts which are required to support the weight of the structure above and transfer same to the ground on firm foundation below Ø The dead shores stand away from wall on either side so as to allow for working space

Scaffolding

Ø Scaffolding It is a temporary structure made from poles of wood or metal that lets you work on parts of building that can not be reach from ground for safe working It is used in construction, Demolition and maintenance of any structure

Ø Components of Scaffolding System

Ø Types of Scaffolding Ø Ø Ø Ø Single scaffolding Supported (independent) scaffolding Double scaffolding Cantilever scaffolding Suspended scaffolding Trestle scaffolding Tower, Mobile or Arial scaffolding Steel scaffolding Patented scaffolding