Slab-on-grade radiant heat
Slab-on-grade radiant heat
(OP)
Has anyone ever done a building basement slab-on-grade with embedded plastic pipes in the bottom half of the slab that provide radiant heating?
Can the slab-on-grade design be the same as if there were no pipes in it -- that is, unreinforced and early-entry sawcut to about 1/4 the slab depth at 4.5 m maximum centres each way? I am concerend about whether the plastic pipes kill some or much of the effectiveness of the sawcuts.
If they do interfere with the effectiveness of the sawcuts, what can be done, without making the slab-on-grade excessively expensive?
The slab is about 70 m square. The plastic pipes are about 16 mm diameter I believe.
Can the slab-on-grade design be the same as if there were no pipes in it -- that is, unreinforced and early-entry sawcut to about 1/4 the slab depth at 4.5 m maximum centres each way? I am concerend about whether the plastic pipes kill some or much of the effectiveness of the sawcuts.
If they do interfere with the effectiveness of the sawcuts, what can be done, without making the slab-on-grade excessively expensive?
The slab is about 70 m square. The plastic pipes are about 16 mm diameter I believe.






RE: Slab-on-grade radiant heat
Do not saw cut as you will likely hit the tubing.
RE: Slab-on-grade radiant heat
But what I am really interested in, is whether anyone has done large area slab-on-grade with the radant heating piping crossing the sawcuts. Or does anyone have any advice for how this should perform, if the palstic piping crosses the sawcuts?
RE: Slab-on-grade radiant heat
RE: Slab-on-grade radiant heat
Are you concerned more with the performance of the slab or potential damage to the radiant tubing?
The greatest trick that bond stress ever pulled was convincing the world it didn't exist.
RE: Slab-on-grade radiant heat
I would go ahead with your sawcutting as if the heat lines weren't there.
RE: Slab-on-grade radiant heat
The greatest trick that bond stress ever pulled was convincing the world it didn't exist.
RE: Slab-on-grade radiant heat
RE: Slab-on-grade radiant heat
RE: Slab-on-grade radiant heat
RE: Slab-on-grade radiant heat
See the attached for typical details. These are Viega's (from their Concrete Systems Manual"). Uponor (another major supplier) uses similar details.
Regards,
DB
RE: Slab-on-grade radiant heat
RE: Slab-on-grade radiant heat
And do we need to specify "expansion joints" at some given centres to avoid the possibility that the thermal effect from the embedded pipe heating will exceed the concrete shrinkage, and cause the slab to buckle?
RE: Slab-on-grade radiant heat
EIT
www.HowToEngineer.com
RE: Slab-on-grade radiant heat
RE: Slab-on-grade radiant heat
RE: Slab-on-grade radiant heat
The benefit to adding the mat is you can then tie the radiant heat lines to the mat which will keep them in the bottom of the slab instead of floating to the surface.
RE: Slab-on-grade radiant heat