Originally Posted By: roconnor
This post was automatically imported from our archived forum.
I agree with Rick that an engineer should look at that to determine it’s acceptable (I posted the same under a dupe post in the Structural forum) … and I am surprised by some of the comments, even from some veterans …
I understand the desire to help someone, but does anyone here know the condition or capacity of the structural floor joists the homeowner is planning on putting over a ton of load on in a relatively small area? Yes, over a ton ... I roughed about better than 2,000# (water, rocks/sand, large glass tank, and hefty stand) and the homeowner confirmed that in another post.
Thats about 200 psf of loading ... far in excess of normal 30 psf to 40 psf residential floor loading ...
... And supplementary supports are not a simple thing, even if it looks that way. Does anyone understand existing member stress increases from forced deflection compatibility ... unless some very special procedures are used.
Very heavy loads like hot tubs, pianos, and water beds sometimes cause framing to sag ... even with "supplementary supports" ... and are the subject of lawsuits sometimes. Some waterbeds will load your floor to around 60 psf, which is a heavy load. Many apartment complexes will not even allow these do to the heavy loads, and that large fish tank will far exceed those loadings.
Even if that is installed without a failure, it might push the framing right to the limit where all it takes is a straw to break the camels back. And some framing does fail suddenly if seriously overloaded ... so filling it and taking a look is a really really really bad idea. Trust me on that one, I am also a structural engineer and things do go wrong ... look at the quote below my signature line.
Who is that homeowner going to look to if he does encounter a problem, or if what he did really isn't acceptable?
Robert O'Connor, PE
Eagle Engineering ?
Eagle Eye Inspections ?
NACHI Education Committee
I am absolutely amazed sometimes by how much thought goes into doing things wrong