STUMPS UNDER-NEAR SLAB
STUMPS UNDER-NEAR SLAB
(OP)
POURING A MONOLITHIC SLAB NEAR(10') AN EXISTING HUGE PECAN TREE RECENTLY CUT DOWN--WILL ROTTING ROOTS CAUSE VOIDS UNDER SLAB--DAMAGE SLAB OR WILL SLAB BE STRONG ENOUGH TO IGNORE
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RE: STUMPS UNDER-NEAR SLAB
I've seen some pretty crummy building sites containing a lot of logs, stumps, etc. I suspect the rotting leaves some "loose soil", but arching around these weak places seems to occur and the building owner is not affected. I've never found a settled building or similar problem caused by buried logs or stumps. A sawdust pile is another matter.
Personnaly I built a garage over some large stumps and figure the slab has enough strength to bridge these weaker areas.
Doing a grubbing job to take out the stump and roots is more likely to leave large loose zones than if you didn't try it.
RE: STUMPS UNDER-NEAR SLAB
RE: STUMPS UNDER-NEAR SLAB
I once found an owner (Sears) would not allow compacted fill to be placed on a natural ground situation where there were scattered roots from grass. After stripping topsoil, it took quite a bit of convincing the owner's engineer that he had nothing to fear with these scattered fine roots. So, you can take this to the extreme if cost means nothing. Of course no problem for that store done some 40 years ago.
On another job a house corner settled. The contractor had removed a boulder from that area, leaving things loose. Of course the right thing would be to excavate all that and fix it up, but not every contractor is that concientious.
I find that generally owners will take the more economical approach when there is no clear cut reason for spending money.
RE: STUMPS UNDER-NEAR SLAB
RE: STUMPS UNDER-NEAR SLAB