Joist question

[mathew stouffer]

Is this type of joist rated for exterior exposure. Several joists were sistered under a hot tub and the water from the tub was deteriorating the joist. But,I was curious what everyone knows about these.

Thanks

[Matt Fellman]

Wow, all kinds of problems there....

Leaking tub of some type

Boring in the lower 1/3 of the joists

And no, I'd say that's not an 'outdoor' piece of lumber. However, I think the decking might give out before the joist.... kind of a race, really :)

That's a glue-lam of sorts, definitely not intended for outdoor use... under a hot tub.

[Billy Stephens]

Weyerhaeuser makes it . :)
.
http://www.ilevel.com/literature/TJ-7000.pdf
.
Also as treated / exterior applications ( PSL )

http://www.ilevel.com/literature/TJ-7100.pdf

[David Banks]

Second PDF posted by Billy says PSL for exterior use.
Rusty nails not good.
Is deck bolted to house. Proper flashings?

[mathew stouffer]

Thanks for the info. I spoke to a rep today and he said they have to be wolmanized for exterior use. Also the hole drilled is not an issue. Thanks for the web site, very helpful.

Mat

[Jerry McCarthy]

If those drilled holes are within 2 inches of the bottom of those framing support members its a violation of IBC 2308.10.4. (2007 CBC same) :confused:

[Ron Bibler]

Good eye Jerry.

Best

Ron

[mathew stouffer]

Jerry,
What if the joists are sistered, does that negate the detrimental effects of holes being drilled in the lower third.