Galway11
Civil/Environmental
- Mar 29, 2011
- 8
Hello everyone,
Have to set out 9m high columns in a couple of weeks for the first time!
Shutters will be prefabricated steel, +-3mm tolerance I think...
240 no. columns in a rectangular grid (150m x 70m), the grid is divided is divided by vertically tapered walls...so only two rows of columns can be seen at a time.
All on local grid coords, location not a problem but controlling verticality might be.
I don't think offset lines, sighting up and down with the EDM and measuring will be good enough or fast enough.
The engineer I took over from recommended setting up the EDM near the column and sighting up along two outside egdes until they agree with EDM crosshairs, doesn't sound good to me though.
I would probably use plumb bobs first. I was thinking of marking C/L offsets with the EDM, then using some form of vertical laser plummet and a target for precision and as a check. I have no experience with using lasers vertically...
Anyone have any experience of this?
Any thoughts on an 9m tapered wall from 1000mm to 500mm?
Would be grateful for any help as have to do it fairly soon!
Have to set out 9m high columns in a couple of weeks for the first time!
Shutters will be prefabricated steel, +-3mm tolerance I think...
240 no. columns in a rectangular grid (150m x 70m), the grid is divided is divided by vertically tapered walls...so only two rows of columns can be seen at a time.
All on local grid coords, location not a problem but controlling verticality might be.
I don't think offset lines, sighting up and down with the EDM and measuring will be good enough or fast enough.
The engineer I took over from recommended setting up the EDM near the column and sighting up along two outside egdes until they agree with EDM crosshairs, doesn't sound good to me though.
I would probably use plumb bobs first. I was thinking of marking C/L offsets with the EDM, then using some form of vertical laser plummet and a target for precision and as a check. I have no experience with using lasers vertically...
Anyone have any experience of this?
Any thoughts on an 9m tapered wall from 1000mm to 500mm?
Would be grateful for any help as have to do it fairly soon!