Cut horizontal bars at wall construction joints?
Cut horizontal bars at wall construction joints?
(OP)
This is a survey - Do you normally cut a percentage of the horizontal bars at vertical construction joints in c.i.p. walls, when the walls span between deep foundations? (Situation I am looking at has long exposed walls in underground parking area).






RE: Cut horizontal bars at wall construction joints?
- Does the wall retain soils and if so does it just span vertically or does it behave in a two-way fasion?
- Do you expect any differential movement (settlement) between the two adjacent deep foundations?
- Does the wall serve as a flexural member supporting axial loads from above (Does the wall height vs. deep foundation spacing provide for compression struts or is the deep foundation spacing large enough that the wall acts flexurally?)
RE: Cut horizontal bars at wall construction joints?
RE: Cut horizontal bars at wall construction joints?
RE: Cut horizontal bars at wall construction joints?
RE: Cut horizontal bars at wall construction joints?
But you asked about construction joints in walls spanning between deep foundations. I would not cut any of the bars. Joint best made over a pile.
RE: Cut horizontal bars at wall construction joints?
RE: Cut horizontal bars at wall construction joints?
Your post made me realize my original question was mis-worded-I am showing vertical control joints at 30' o.c., and meant to ask if you typically cut bars at all of the CONTROL joints. I have seen details where every other horizontal bar was cut at the joint, but that always bugs me when the wall is spanning between pile caps-not an insurmountable problem, just a feel-good thing.
RE: Cut horizontal bars at wall construction joints?
If they were precast walls, then 4 walls 1/4 of the length have only 1/4 of the overturning resistance due to the reduced lever arms.
If you need it continuous then you need to leave the rebar uncut, or preferably follow Taro's advice.