L Shaped Cantilever Retaining Wall Bar Development
L Shaped Cantilever Retaining Wall Bar Development
(OP)
I have a question regarding L shaped cantilevered retaining walls. I see these walls all the time, and obviously they are not falling down, so I must be missing something.
If you go with an L-shaped wall, then how do you get your flexural toe steel fully developed. It is my understanding that you want the steel fully developed in BOTH directions from the critical section. If you are dealing with an 8" inch wall that has ~2" inch side cover, then you are only left with 6" inches to develop your bars. Even with a hook, that is not a lot of space. (See attached diagram.)
I would think you would need to batter the back wall, or extend a small heel out to provide bar development space?
If you go with an L-shaped wall, then how do you get your flexural toe steel fully developed. It is my understanding that you want the steel fully developed in BOTH directions from the critical section. If you are dealing with an 8" inch wall that has ~2" inch side cover, then you are only left with 6" inches to develop your bars. Even with a hook, that is not a lot of space. (See attached diagram.)
I would think you would need to batter the back wall, or extend a small heel out to provide bar development space?






RE: L Shaped Cantilever Retaining Wall Bar Development
RE: L Shaped Cantilever Retaining Wall Bar Development
"It is imperative Cunth doesn't get his hands on those codes."
RE: L Shaped Cantilever Retaining Wall Bar Development
RE: L Shaped Cantilever Retaining Wall Bar Development
If it had enough mass to resist it,elements would be thicker and developement would not be a problem.
Edit...didt see its basement...in that case you mostly have top braced or perpendicular walls. If you dont..i would def. Thicken that slab
RE: L Shaped Cantilever Retaining Wall Bar Development
Possibly have the edge thickened on the underside
RE: L Shaped Cantilever Retaining Wall Bar Development
"It is imperative Cunth doesn't get his hands on those codes."
RE: L Shaped Cantilever Retaining Wall Bar Development
Now--KootK and I have sparred on whether a bar can be "wrapped around a corner" and develop full fy in both the stem wall and the footing. I have come to believe you can justify this, as long as you don't fail the concrete on the inside of the bend.
DaveAtkins
RE: L Shaped Cantilever Retaining Wall Bar Development
larger, non-standard radius will better distribute these stresses, I think a better strategy is to provide a thickness for both the wall and footing that will accommodate Ldh. I usually use smaller bars at 4 to 6" spacing to keep the thickness of the elements down where possible - also keeps the vertical splice lengths down at the cost of more orange hats.