Securing Electrical Equipment
Securing Electrical Equipment
(OP)
I have a project with a lot of switchgear equipment that is normally welded to plate inserts in a concrete slab and don't have the method of securing them. Levelling is an issue and there is little clearance for anything but thin shims. The tolerances are pretty tight and almost unrealistic.
I was planning to cast level insert plates that were depressed about 1/4" below the finished floor with the intent that the shims be welded to the insert plates and the equipment welded to the shims. This will permit thicker shim plates that can be welded. I'm not a big advocate of welding 20GA material. The shims would be of variable thickness and be approx 1/4"-3/8" thick (vary) and that they would be adjusted after the concrete has reached an age of 2 or 3 months; I don't know how to adjust the slab for longer term creep yet, if it's an issue (doubly reinforced? or whatever). The shims could be machined to a proper thickness if necessary and the elevations could be optically/laser determined. There are about 60 of these shim locations.
Has anyone had a similar problem and any suggestions about how to improve/tackle the above?
Dik
I was planning to cast level insert plates that were depressed about 1/4" below the finished floor with the intent that the shims be welded to the insert plates and the equipment welded to the shims. This will permit thicker shim plates that can be welded. I'm not a big advocate of welding 20GA material. The shims would be of variable thickness and be approx 1/4"-3/8" thick (vary) and that they would be adjusted after the concrete has reached an age of 2 or 3 months; I don't know how to adjust the slab for longer term creep yet, if it's an issue (doubly reinforced? or whatever). The shims could be machined to a proper thickness if necessary and the elevations could be optically/laser determined. There are about 60 of these shim locations.
Has anyone had a similar problem and any suggestions about how to improve/tackle the above?
Dik






RE: Securing Electrical Equipment
RE: Securing Electrical Equipment
IMHO, your approach will not be viewed favorably, no matter what it's (structural) merits. The time needed to custom machine plates with the correct thickness will be considered an unreasonable delay (and, in this case, I would agree with the EE's that it is).
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RE: Securing Electrical Equipment
RE: Securing Electrical Equipment