canstruct12
Structural
Hello, I am looking for advice on placement of control joints in a Slab on Grade.
The design drawings call for placement at 4.5m. The contractor has used isolation joints (as shown in blue) and there are two openings in the slab (sump in centre and jib crane foundation on the right hand side), see attached plan drawing. I am trying to position my control joint to limit the ratio to 1:1.5, as well trying to avoid re-entrant corners, as I understand these could be areas that could exhibit irregular cracks (control joints shown in red). But trying to meet those two criteria is somewhat problematic, specifically in the areas highlighted yellow. Does anyone have any guidance on the best placement, without making the spacing ridiculous.
The design drawings call for placement at 4.5m. The contractor has used isolation joints (as shown in blue) and there are two openings in the slab (sump in centre and jib crane foundation on the right hand side), see attached plan drawing. I am trying to position my control joint to limit the ratio to 1:1.5, as well trying to avoid re-entrant corners, as I understand these could be areas that could exhibit irregular cracks (control joints shown in red). But trying to meet those two criteria is somewhat problematic, specifically in the areas highlighted yellow. Does anyone have any guidance on the best placement, without making the spacing ridiculous.
