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Posted by DD_BobK on November 1, 2009, 5:29 pm
> > So, he must have to look at the tables for "dead loads" I take it.
> > I assume they have those, unless that would have to be an engineers cal=
l.
> > Like putting a water bed on the second floor or a piano.
> > I do know that most floor loads in the books are always tested high als=
o.
> > I am sure they can take more if need be.
> The tables show only distributed loads, not point loads. =A0Point loads
> require calculation and won't be in any table. =A0Not only ultimate
> strength will have to be determined, with a factor of safety of
> course, but shear and deflection. =A0The deflection won't be a problem
> most likely. =A0Having the load near the wall minimizes the risk, but if
> the guy wants to look into it he should do it the right way. =A0That
> link gives a good overview of how to do it.
> R
OP-
What is the TOTAL weight of the entire fireplace installation?
Framing, fireplace insert & all the finishes (rock face)?
If the load is in the 600 lb range .....13 ft span at 40 psf is 520
but you have more like a concentrated load (really a local
distributied load)
Just a SWAG but one sistered joist wouldn't be enough, two would
probably be ok, three would definitely do it. But to be sure you need
to do ( or have done) some calcs. That means....get it looked at.
I'd open up the floor or the ceiling below & sister in the joists.
cheers
Bob
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> I assume they have those, unless that would have to be an engineers call.
> Like putting a water bed on the second floor or a piano.
> I do know that most floor loads in the books are always tested high also.
> I am sure they can take more if need be.