Transiton Bridge Coupler

[ahmedsamy]

I am currently working in the construction of high rise tower in the Gulf.
We cast the walls first then after, we cast the slabs/beams.
Now in one of the levels we found that the couplers in the wall are of a diameter less than the required for the slab, so we will use a transition bridge couplers to splice the actual slab reinforcement (T25) with the pre-installed hooks in the wall (T20). The Ldh oh the hook in the wall is bigger than required for T20.
So is this safe ?
Does any Committee/clause of the ACI covers this case ?
Please share with me your knowledge.

 

[KootK]

The coupling ought to be fine but you'll be limited to the capacity of the T20 bars. Unless the T25 bars in the slab were over specified - and they may well be - you would come up short on capacity in the slab.

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.