curved slab - U bars - how to place ?
curved slab - U bars - how to place ?
(OP)
Hi
it is difficult to explain you must see the attached sketch. By a curved slab how would you place the Ubars to close up the reinforcement of the cantilever slab?
90 degrees to the curved edge or would you stick to the parallel bars according to all the rest?
BauTomTom
it is difficult to explain you must see the attached sketch. By a curved slab how would you place the Ubars to close up the reinforcement of the cantilever slab?
90 degrees to the curved edge or would you stick to the parallel bars according to all the rest?
BauTomTom






RE: curved slab - U bars - how to place ?
BA
RE: curved slab - U bars - how to place ?
If they are for development of the main bars then they need to lap with the main bars.
If they are for serviceability then you need to thank of where the cracks are likely to be.
As an aside, I would suggest a diagonal trimmer top and bottom along the face of the curve to help prevent cracking.
RE: curved slab - U bars - how to place ?
Not sure what a diagonal trimmer is (UK term?) but it sounds like a good idea if it means a short developed bars along the curve.
RE: curved slab - U bars - how to place ?
RE: curved slab - U bars - how to place ?
Mike McCann
MMC Engineering
RE: curved slab - U bars - how to place ?
RE: curved slab - U bars - how to place ?
RE: curved slab - U bars - how to place ?
RE: curved slab - U bars - how to place ?
How is the slab supported? What are the boundary conditions? I tend to agree with JAE that the U bars do not do anything.
BA
RE: curved slab - U bars - how to place ?
As to why, well that's another question.
BauTT: It would be well to get some of your input here.
Mike McCann
MMC Engineering
RE: curved slab - U bars - how to place ?
You are right in best case the U bars should be outside but the problem is that if they go really 90 degrees to the curved wall then they will get into a other layer again.
The cantilever is very short. Around 0.5m so there we don't need to worry
- - to CSD - -
Diagonal trim along the face? Sorry somehow don't know how you mean it
- - to Teguci - -
So you would do orthogonal to the rest reinforcement. But why headache? There shouldn't be anything complicated and for the free curved edge a orthogonal reinforcement would be the best
- - to msquared48 - -
Add one or two curved bars between the U bars? The slab is only 250mm high and still four bars distributed on this hight?
- - to RC Detailer - -
You can see the sketch right in the first meail from me there is a link for it
- - to JAE - -
Our code says, that a free edge of concrete should have such U bars in the edge line. Static wise they don't have a major reason I think it is just to prevent cracks
- - to msquared48 - -
Let me attached some scans out of my detailing book. This is what I mean
BauTomTom
RE: curved slab - U bars - how to place ?
The detail you posted does show two trim bars at the end. It could be one if depth is a problem. The "U" still has to be bent and it has a radius. That's where the trim bar(s) go. No problem.
Mike McCann
MMC Engineering
RE: curved slab - U bars - how to place ?
BA