10" concrete slab or is it?
10" concrete slab or is it?
(OP)
We have a project with an elevated 10" concrete slab. Before the pour the contractor put the reinforcing in on chairs then a layer of 1" conduits side by side and then a layer of 2" conduits side by side with no room for concrete to get to the bottom of the slab not mention the area of concrete being displaced. The slab has deflected and in some places the little bit of concrete that made it to the bottom of the slab is just falling off. Does anyone think there is any alternative but to remove all the concrete in the affected areas and start over. I personally think the contractor should of known better than to do this.






RE: 10" concrete slab or is it?
If necessary, one way to handle objections from the Contractor is to have him hire his own Engineer (at his expense) to prepare and submit a report to you on why the slab is acceptable - doubt if that will happen.
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www.SlideRuleEra.net
RE: 10" concrete slab or is it?
RE: 10" concrete slab or is it?
RE: 10" concrete slab or is it?
Conduits shall not significantly impair the strength.
Conduits OD shall not be larger than 1/3 overall slab thickness.
Conduits shall not be spaced closer than 3 diameters or widths o.c.
RE: 10" concrete slab or is it?
RE: 10" concrete slab or is it?
www.SlideRuleEra.net
RE: 10" concrete slab or is it?
This is incredibly amateurish, I can't believe this was a licensed contractor!
RE: 10" concrete slab or is it?
A smart contractor would have submitted an RFI because this was discovered while making a lift drawing. A regular contractor would have called the engineer out after the conduit went in and said "what do you want me to do now?" An incompetent contractor would do what was done.
Rip it out and fix it. No extra money, no extra time, just get it done and done right.
RE: 10" concrete slab or is it?
RE: 10" concrete slab or is it?
I agree...this should come out and start over.
RE: 10" concrete slab or is it?
If the conduits are anywhere close to the design, this is a case of design/construction incompatibility (constructability issue). If not, the contractor needs a new superintendent.
RE: 10" concrete slab or is it?
Ingy,
Apparently the electrical conduits for all the floors go down until the floor in question and then travel horizontal thru the slab to a chase. The electrical drawings do not indicate this. You would think the conduits for each floor would travel through the slab at that level to a chase.
Again thanks everyone for your comments!
RE: 10" concrete slab or is it?
RE: 10" concrete slab or is it?
Who thought the concrete would get to the bottom of that?
I would be woried about the quality of your inspector, as well as your contractor!
RE: 10" concrete slab or is it?
Prop that thing up!
As a side note, I have encountered many drawings, electrical or otherwise that refer to equipment to be installed by others with no grasp of the actual size of the embedded items. It can make a very fuzzy case with regard to responsibility. Ingy hit it on the head with his comments above. It never should have gotten this far...
Daniel
RE: 10" concrete slab or is it?
RE: 10" concrete slab or is it?
That is one amazing picture.
RE: 10" concrete slab or is it?
RE: 10" concrete slab or is it?
SECTION 01083
DUH AND OTHER STUPID TRICKS
RE: 10" concrete slab or is it?
Perhaps that should be in the building code: lack-of-sense load increase factor assigned to the contractor based on past performance.