Measure Twice, Cut Once

[Ross 1]

Originally Posted by CJR09

I was working an industrial site some time ago - prob 20yr or so - was a dairy factory - the 50m high drying towers were precast - one of the head honchos turn up stops in his tracks, turns to the site manager and say 'that tower wall is not plumb' site manager calls bs gets his laser out f's around for a bit 20min or so - comes back all sheepish and says 'ah yeah looks like its 45mm out of plumb'

Turns out dudes put it up with un-calibrated gear...

99% of people wouldn't know - some just have a real good eye

We were subcontracting a few years ago and we started setting out and I questioned the levels as they didn't look right by eye, their guy was adamant their laser was fine. Set it up in front of a long white wall and in the space of 5m it had dropped nearly 50mm. When questioned they hadn't had it calibrated in 4 years, their dumpy was unusable as someone had dropped a breaker on it and no one wanted to tell the boss. The worrying thing was I know they kept using the laser level on other jobs.