Setting survey process is applied to set out the exact position of a projected structure inside the legal boundaries of a plot of land. Get additional information about Setting Out Engineers
The objective of setting out is usually to set out ideal position and levels of building lines and road alignments for any projected structure as per construction plans by applying different strategies and instruments.
This type of survey is quite important while going to setup any form of building work.
Commonly, a set-out survey comprises with the process for transforming a building design onto the land itself in order that the builders can abide by the process all through building. All through the process, main points are set up and markers are applied for the progression on the building process and retain perfectness.
For large scale projects like high rise buildings and developments, many set-out surveys are essential because the building advances. This sort of survey is primarily undertaken for the earthworks, roads, car parks, sewerage, water along with the actual buildings themselves.
Strategies of Setting Out Survey
1. Setting out buildings by coordinates
2. Setting out with theodolite and level
3. Examining verticality
4. Setting out and alignment in steel framed buildings
5. Alignment and verticality in type work
6. Control and computation for route surveying
Setting Out Building by Coordinates
A building is set out by adopting referencing from an currently established baseline. An asymmetrical building or a building with difficult geometry can also be established by applying the equivalent process. For each and every corner from the building, a grid line is setup in the baseline.
Examine Verticality - The verticality of points in a building is examined with the following surveying instruments:
1. Plumb Bob (For buildings much less than 20m in height)
2. Optical Plummet (A transparent plastic sheet is used as a target for checking verticality of tall buildings)
3. Theodolite
Setting out Survey works also contains the following :-
Calculations and setting out Techniques for:
1. Simple Circular Curves
2. Compound Curves
3. Reverse curves
4. Transition curves
5. Vertical curves