Treehouse, cantilevered deck and joist hangers
Todd E. Jones
horizontal support beams (2X12s), each one fastened by 8" lag screws
to a pair of trees. Then, perpendicular to these support beams are 2X6
joists, which will span about 8 feet (before the cantilevering).
Contrary to typical building approaches, I will be laying the joists
on top of the support beams. This is so I can extend the joists about
3 or 4 feet beyond one set of beams for a cantilevered deck. However,
it seems clear that typical joist hangers will not provide any
protection from the uplift at the uncanilevered end of the joists.
I have looked at different joist/hurricane bracing hardware and
haven't found anything that appears strong enough to perform this
support. I have some hurricane ties that are essentially a piece of
sheet metal with a 90 degree twist in it and some holes for modest
deck screws. The whole apparatus is only about 5 inches long and
doesn't inspire confidence.
I am prepared to redesign the mating surfaces of the beams and joists
to make the cantilevering more solid, but I was hoping someone knew of
a joist hanger type system for supporting perpendicular board which
intersect as their narrowest dimension.
Any thoughts?
Todd Jones
Owner, Producer, Industrial Hygenist, Janitor
HUGE sound generation & capture facility
Cape Fear River Basin, NC
http://www.mindspring.com/~toddjones
eric ryder
leaving the rt angle bend, or drill out some angle iron.
Todd E. Jones <todd...@SPAMLESSmindspring.com> wrote in message
news:3b67525e...@news.mindspring.com...
Jim N.
may find something that will work for your situation.
http://www.strongtie.com/fr_homeowner.html
Good Luck,
Jim
Joe Barta
Keep in mind a couple things...
1) You can use up to 4 ties per joint. You can also toenail the joist
into the beam.
2) While one connector may not inspire confidence, you'll actually
have many connectors working simultaneously. That's where the
strength comes from.
- Joe Barta
Bob Morrison
--
Bob Morrison
R L Morrison Engineering Co
Structural and Civil Engineering
Poulsbo WA
John Taylor
Whoa...Now that's thinking outside the box! Very clever!
JT
Bob Morrison wrote in message ...
Todd E. Jones
Well, that will prevent uplift, but what about "down drop?"
After visiting the evil Home Despot, I have decided on using heavy
duty hurricane ties, which are 6" metal strips that have a 90 degree
lateral twist. I will have an opportunity to use 4 at each junction. I
will be careful not to put too many screws into the junction which
would weaken the wood.
Thanks to all for your input!
ghost-sniper
"Todd E. Jones" <todd...@SPAMLESSmindspring.com> wrote in message
> Bob Morrison <blue...@nospam.org> wrote:
>
> >Install the joist hangers upside down.
> >
> >--
> >Bob Morrison
> >R L Morrison Engineering Co
> >Structural and Civil Engineering
> >Poulsbo WA
> Well, that will prevent uplift, but what about "down drop?"
The anchors work both ways, up and down, as long as all the lateral
fasteners are installed properly.
A 16D nail has approx. 150 lbs of holding capacity x number of nails per
anchor.
Dan Berry
>
> After visiting the evil Home Despot, I have decided on using heavy
> duty hurricane ties, which are 6" metal strips that have a 90 degree
> lateral twist. I will have an opportunity to use 4 at each junction. I
> will be careful not to put too many screws into the junction which
> would weaken the wood.
>
> Thanks to all for your input!
> Todd Jones
H-ties are designed to be used with nails, not screws.
Dan
Todd E. Jones
>
>H-ties are designed to be used with nails, not screws.
>
>Dan
Dan,
You are so totally correct. I just learned why: Screws have little
protection against shear, which is the main force exerted on joist
hangers, H-ties etc. Nails are superior in shear. My source told me
there are special joist hanging nails for this very purpose.
Off I go!!!