Hi there
I mainly do topograpical surveys in the UK but I'm helping out on a building site for a few weeks as their setting out surveyor has left.
I have some drain inspection chambers that need to be accurately set out so that they are centred in some narrow paths that are being built in a couple of months. I have cad files that I have loaded on my data controller.
What is the most practical way to help the groundworker to be able to set these out so the are positioned accurately. The Architect has insisted that the are centered in the future pavements.
I was considering spraying the location so the digger driver can dig down and then marking some offsets on some timber pegs driven in the soils.
All the best Fobos8
Firstly I would ask the drainage contractor what they want..
The following works well for me and provides some measure of redundancy to avoid revisiting the site.
Place two pairs of pegs set such that stringlines run between the pairs cross at the centre of the feature.
Set them far enough back to give the machinery room to work. Preferably all the same distance from the centre - this helps when a peg gets lost
Give depth to invert from at least two pegs, again in case of loss of a peg.
Hope this helps
=Jim=
Thanks Jim
That's great advice
I'm assuming that these "inspection chambers" are something akin what would be called "catch basins" here. I'd set 2 stakes, one at 5 feet from the center of the structure, and another at 10 of 15 feet from the structure, on line, so that the installer can line up these 2 to set the structure. Include cut/fill data relative to the closer stake. In addition to I'd probably include some stakes, marked with a different colour, for the pathway edges in the area of these structures.
Thanks Norman that a good shout as well