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  1. LeeGreen

    Column Verticality Check

    With a good theodolite and proper procedure, it can be done. It will take two setups per column. You will need to setup perpendicular to the column. Plumb the steel column with the vertical crosshair of the theodolite. Have a person hold a wooden rule along the side of the steel column...
  2. LeeGreen

    Column Verticality Check

    Are you thinking of a 4ft Smart Level? At ±0.2°, it is not accurate enough. I own a Topcon DL-502 digital level. It is extremely accurate (±0.6mm), but no way to use it for the OP's intended purpose. ~LeeGreen.com Licensed Surveyor in NY sUAS Remote Pilot
  3. LeeGreen

    Column Verticality Check

    "Would you considered 1/600 between column splices?" Yes, if that is the required tolerance. That would equate to 78mm allowable deflection in the entire 47m. ~LeeGreen.com Licensed Surveyor in NY sUAS Remote Pilot
  4. LeeGreen

    Preserving Benchmarks during Repaving

    If the monuments are disturbed or destroyed they will need to reset by a licensed land surveyor. If you know they are going to be destroyed, be certain to hire the surveyor prior to construction, so he can accurately locate original monuments location.
  5. LeeGreen

    Intersection angle of reverse curve

    Either this is a simple/trick question or we need more information. The angle at the PRC for all four quadrants is always 90°.
  6. LeeGreen

    Column Verticality Check

    I have performed many "vertical column plumb surveys". A task that requires this type of precision must be done with a very accurate instrument and procedures. The instrument needs recent calibration. Are you prepared for this? If not, I suggest you hire a licensed land surveyor with experience...

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