Construction joints
Construction joints
(OP)
I practiced in the british isles for 10 years and in vertical walls, we always just scabbled (exposed the aggregates) at the joint carried the rebar through and assumed it has the same shear capacity as a monolithic joint.
I practice in N America (Canada) now and they always cast a shear key in the joint (expensive). Any insight as to why that is adopted would be appreciated.
I practice in N America (Canada) now and they always cast a shear key in the joint (expensive). Any insight as to why that is adopted would be appreciated.






RE: Construction joints
RE: Construction joints
Check out Eng-Tips Forum's Policies here:
FAQ731-376: Eng-Tips.com Forum Policies
RE: Construction joints
I disagree with that. I would argue that you get the shear capacity associated with shear friction rather than full capacity. They'll be close though.
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: Construction joints
Dik
RE: Construction joints
ACI 224.3 (report) has some useful discussion on this topic.
Keys are more appropriate for movement joints in lightly loaded slabs (not pavement).