Attached below is an old spreadsheet I created many years ago to reduce long line distance measurements. It includes just about every factor to incorporate: slope, temperature, curvature refraction, HI and HT etcSee More
"I used a similar method many years ago. The plexiglass had a cross scored into the surface from edge to edge so that reference marks can be made on the floor so that it can be repositioned later in the same place.
As for plumbing up, just remember…"
"The column is 8m, the box is a shutter for the concrete to pour the colmn, but they dont have a single box to pour the entire column in a single go. They have a box only 6.4m long, which will be the first pour of the column. Once this has set, the…"
"I have read a few of the links, no one seems to mention an optical plummet.
A specialised piece of equipment for transferring points vertically, something like a Wild ZL or NL. (Ask uncle google)
I used one on 28 story building to establish control…"
I am qualified as a Land Surveyor in New Zealand, spent 8 years in the UK working in the Building construction field. Then in South Africa since 2009 doing cadastral and construction surveying. Now back in good old NZ
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