Use a plumb laser, there are several high quality ones out there. Plumb up through sleeves, run control each floor to close out. Check out to a 360 prism as back up.
A quick google search of "high accuracy plumb laser" came up with this:
http://www.engineersupply.com/LaserLine-Quad-1000-Precision-Zenith-Plumb-Laser.aspx
Says +/- 0å¡00'05". At 900 ft the beam is 9/16" wide. Seems pretty good. Who else makes them?
Dan Patterson, post: 362973, member: 1179 wrote: A quick google search of "high accuracy plumb laser" came up with this:
http://www.engineersupply.com/LaserLine-Quad-1000-Precision-Zenith-Plumb-Laser.aspx
Says +/- 0å¡00'05". At 900 ft the beam is 9/16" wide. Seems pretty good. Who else makes them?
http://www.geo-fennel.de/nc/en/products/produkt/Produkt/show///flp_100/
http://www.fpm.de/lang_en/index.php?c=1&s=plumb
James Fleming, post: 362975, member: 136 wrote: http://www.geo-fennel.de/nc/en/products/produkt/Produkt/show///flp_100/
I think I would go with laser over optical if it were me. I don't really do this kind of work though.....I stay with shorter buildings.
Dan Patterson, post: 362981, member: 1179 wrote: I stay with shorter buildings.
So do I (usually)...it's the law
https://en.wikipedia.org/wiki/Height_of_Buildings_Act_of_1910
Why go up when you could stay at ground level.;-);-) Anything over two stories is a novelty in these here parts. Grain elevator silos are the highest thing around.
What goes up; must come down....
[MEDIA=youtube]oeHe9BHr9So[/MEDIA]
Lucky Philly's were treated to a Building Demo yesterday; I love a good controlled explosion....B-)
Dan Patterson, post: 362981, member: 1179 wrote: I think I would go with laser over optical if it were me. I don't really do this kind of work though.....I stay with shorter buildings.
Never used that brand/model. So you shoot the laser from the ground then mark it with those translucent plates? Then level your TS over the plates?
That would definitely be useful for floors above 4 or 5 levels. I remember having difficulty with the optical plummet in locating the ground point marker.
I would also go the laser plumb route from ground, place clear perspex plates over edges, elev shaft or plumbing holes and start to work from there. Outside control massively important and I wouldn't got the 360 prism route. Working on a 20 storey at the moment, Would rather go with mounted Nodal prisms. Just my 2cents