imbedded beams 1

[witchdoc]

We have been asked to provide steel beams imbedded in a concrete floor. It is our understanding that rails will be installed on the beams. Automated die spotting carts will run on the rails. The specified slope tolerance for the beams is 0.006" per foot.

The available mill tolerance on most of the beam sizes is at least 40 times what we are required to hold.

We have identified one solution -- weld bar to the top flange of the beam, straighten the beam in a press, then mill the plate.

The cost for this method is high. There are several hundred feet of beam to install. Does anyone have a detail that is cost effective yet easy to install?

 

[SteelMover]

WitchDoc-

We design and install high tolerance fully welded crane rails all the time to similar tolerances as described above. Actually often tighter, and we do it 300' in the air at times, so its not impossible.

The detail we use is a milled leveling plate installed above a standard tolerance beam. The leveling plate is milled flat and has a hole in each corner that fits over (4) studs welded to the top of the beam. They are on equal intervals (we use an 18" plate with 6" between plates). Under the plate in each corner there is a leveling nut. The plate can then be adjusted infinitely to account for tolerance stack up. The rail sits on top of the plates and we use the same studs to tighten down the rail clips. After the plates are adjusted to align the rail, we grout the channel under the plates with epoxy grout to transfer the bearing load into the beam.

This is what we do and we do it well, we have even done some remote storage systems before. If you would like some official help, check us out.

http://www.uni-systems.com

Justin