Horizontal Cold Joint - Footings
Horizontal Cold Joint - Footings
(OP)
All - are they are any issues with punching shear if a footing gets poured with a horizontal cold joint.
For example, if there was a 4' thick footing that got poured in 2 lifts of 2' thickness. I have checked the interface shear and vertical reinforcement provided to cater to the horizontal shear to ensure they are composite for flexure.
I could not find any literature that talks about this being acceptable for punching shear and I don't feel comfortable doing it.
Thoughts?
For example, if there was a 4' thick footing that got poured in 2 lifts of 2' thickness. I have checked the interface shear and vertical reinforcement provided to cater to the horizontal shear to ensure they are composite for flexure.
I could not find any literature that talks about this being acceptable for punching shear and I don't feel comfortable doing it.
Thoughts?






RE: Horizontal Cold Joint - Footings
Mike McCann, PE, SE (WA)
RE: Horizontal Cold Joint - Footings
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Horizontal Cold Joint - Footings
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Horizontal Cold Joint - Footings
I guess they also abandon the tower crane pieces that they appear to be casting into the slab as well?
RE: Horizontal Cold Joint - Footings
Mike McCann, PE, SE (WA)
RE: Horizontal Cold Joint - Footings
Embarrassingly, I don't know. The plans show two cranes in the area, one on top of the raft and one on a footing below the raft (pic). That's all it says. Would one ever abandon a crane chunk like that? Maybe there was some sequencing voodoo that eliminated that necessity.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Horizontal Cold Joint - Footings
RE: Horizontal Cold Joint - Footings