pipe sleeve under footing
pipe sleeve under footing
(OP)
A project is under constuction now where I orginally detailed all under slab plumbing pipes to be sleeved into either the foundation wall or the wall footing, depending on the I.E. of the pipe. now that all of the footings are poured it turns out that many of the pipes will now pass under the wall footings at 90 dergree angles. do I still need to provide a sleeve for this pipe? The pipe is PVC and will vary in size from 4"-12" and vary between 4' and just a few inches below the bottom of the wall footing. if a sleeve is requried, where can I find a detail of what this should look like?






RE: pipe sleeve under footing
Depends a lot on the type of soil you have. If the soil is moisture sensitive, then there can be complicated issues of isolating the pipes.
Where the pipe is very close to the bottom of the footing, I would use a void, maybe a piece of low density styrofoam, over the pipe. Have seen straw bales used for this purpose. As the pipe goes deeper, less chance it will be affected by footing load, as long as the trench is backfilled properly.
RE: pipe sleeve under footing
RE: pipe sleeve under footing
RE: pipe sleeve under footing
Never run pipes below column footings! Always lower column footing below the pipe.
Run pipes thru foundation walls with blockout or sleeve and additional diagonal rebar. Provide sufficient distance around pipe to allow for settlement without the potential of rupturing the pipe.
Drop wall footing below pipe or use lean concrete fill to carry bearing stresses below pipe level. Provide sleeve or blockout with clearance for pipe as described above. For low bearing stress condition, footing may be stopped on either side of pipe. EOR or Geotech needs to evaluate this condition.
I hope this helps!