Rebar Field Fix : 2-#5 instead of 1-#6
Rebar Field Fix : 2-#5 instead of 1-#6
(OP)
A contractor on a project of mine accidentally installed a grid of #5 bars in a foundation when he should have used #6's. So, as a field fix, he just added an extra #5 bar at each bar he had already laid down. He's getting me pictures tomorrow, but I'm assuming 2-#5 bars sitting right next to each other acting as a single bar. Does anybody see a problem with this? I've thought about it and feel like it is acceptable. Sure, if the bars are right next to each other, they both won't be 100% encased in concrete but will be pretty close. I also don't think they need to have any space in between to allow for aggregate to flow through since they're intended to act as one bar. Also, I feel good that the ductility of steel will allow the bars to yield and share the load with each, therefore acting more like a single bar with an area greater than the #6 that was originally specified. Thoughts?






RE: Rebar Field Fix : 2-#5 instead of 1-#6
RE: Rebar Field Fix : 2-#5 instead of 1-#6
Or, just add more #5's in between what is there....if there is enough space and check that design
RE: Rebar Field Fix : 2-#5 instead of 1-#6
RE: Rebar Field Fix : 2-#5 instead of 1-#6
RE: Rebar Field Fix : 2-#5 instead of 1-#6
RE: Rebar Field Fix : 2-#5 instead of 1-#6
Probably OK but check it. And remember, the loads we use are usually fairly conservative -- if you are within 10% - probably OK
And CHARGE the contractor. Maybe he will pay closer attention next time.
Like the old saying "It is easier to ask forgiveness then seek permission"
RE: Rebar Field Fix : 2-#5 instead of 1-#6
As for checking it I don't feel like I need to look at my model as long as I can use the full area of 2-#5 bars to replace the #6 bar. If people think I can't use the full 100% area of the 2-#5 bars then I would need to be able to use at least 70% of the .62 in2. area to keep it within the area of a #6.
And when you say to charge him are you referring the investigative time I have spent on this so far because I will do that. I don't deal with billing, but I'll write it on my time card and my boss will decide what to do with it.
Unfortunate about the forgiveness/permission saying. While it may be easier for him I'd rather these things get addressed before the concrete sets.
RE: Rebar Field Fix : 2-#5 instead of 1-#6
RE: Rebar Field Fix : 2-#5 instead of 1-#6
Bundled or spaced 2" apart. ACI 318 7.6.6 is intended for more serious conditions.
This is concrete foundation work.
RE: Rebar Field Fix : 2-#5 instead of 1-#6
Even if "bundled" how did he actually tie them together: with wraps every 12 inches - or 24 inches, or 36 inches, or just at the ends? At every intersection with the other lattice bars?
Get your money back. And get a way so HIS insurance pays the structural warrantee when it breaks under load.