slab on grade column blockout re-entrant corner reinforcement?
slab on grade column blockout re-entrant corner reinforcement?
(OP)
It seems to be widely accepted that slab on grade tends to crack at re-entrant corners. Please see my attached image for my question.
--Does everyone here put rebar at column blockouts below the sawcut jt at re-entrant corners to prevent full depth cracking?
--Why or why not?
--Please comment. Even better, point me towards some reference material I can read.
Thanks.
--Does everyone here put rebar at column blockouts below the sawcut jt at re-entrant corners to prevent full depth cracking?
--Why or why not?
--Please comment. Even better, point me towards some reference material I can read.
Thanks.






RE: slab on grade column blockout re-entrant corner reinforcement?
For the concrete column detail, I would locate joints on the face of the column instead of on the centerline. Add diagonal rebar where there are no joints. Another variation of this is the pinwheel arrangement (no additional rebar needed)where a joint comes off of each corner.
Try to keep the rebar fairly close to the column to prevent the crack from forming. If it is located too far away, the slab will still crack.
RE: slab on grade column blockout re-entrant corner reinforcement?
For concrete columns, we go with cirular column blockouts.
RE: slab on grade column blockout re-entrant corner reinforcement?
Carl Bauer
www.bauerconsultbotswana.com
RE: slab on grade column blockout re-entrant corner reinforcement?
RE: slab on grade column blockout re-entrant corner reinforcement?