Greetings,
For a 14′ Gazebo type accessory structure roof w/out horizontal ceiling joist – cathedral / exposed, ceiling/roof frame.
Anything out there on how to frame roof to counter the outward thrust? I’m in Rhode Island – snow loads are important.
Thanks
Replies
I just started this thread describing a similar structure I am building.
http://forums.taunton.com/tp-breaktime/messages/?msg=113143.1
Link to Picasa web picture album
http://picasaweb.google.com/leesphere56/TimberFramePavilionShort#
This is a timber frame so it may not be applicable to your situation but its one way to skin the cat.
Would depend on what the roof sits on...If the corners of your octagon are made so that either a double plate laps onto the next "wall" or a metal connector to lock the intersecting points together. It also depends on the connection of hip rafter to plate, or beam, on top. If these can be made solid, without sacrificing aesthetics, the shape of the roof pushing equally on all points is pretty strong. I would use some metal connectors, and not sweat it. Have done a few, "post and beam" style, with t+g ceiling/roof. No issues thus far...
Not sure how much advice you're looking for, but it's a lot easier to build a "hub" to run all your hips to, than to try to fit your rafters to a common point. Essentially makes it a common rafter from each hip to a flat spot on the hub....Hope this helps.
Bing
Ps. I'm in Rehoboth, MA. so snow load pretty similar....Unless you're in "Foster/Glocester! No school today!"
There was a pretty good thread a while back...
I described using criss-crossing collar ties at different heights. That worked for me.
I think the guy ended up using a ring -- some sort of steel band wrapping the circumference, and fastened back to itself.
Easiest way to make a "hub":
Take a piece of 5/4 (1 1/16" is ideal).
Rip a 45* bevel on one edge.
The flat of this bevel should measure almost exactly 1 1/2".
Now measuring from the short point of this bevel, mark the face of the board at 1 1/2".
Bevel the other edge of the board to this mark.
You should have a board with three 1 1/2" flats, all at 45* to each other.
Cut two equal lengths of this board, long enough to be a bit longer than the top plumb cut of your hips.
Put these two pieces back-to-back, with a square-edged piece of 2x sandwiched between them.
You should now have a solid, octagonal block, 1/12" on each side, ready for all your hips to butt into.
Leave this block as is, or put some sort of decorative pendant on the bottom of it.
AitchKay
Is this to be an octagon, hexagon, square, rectangle, or what? I realize most gazebos are octagons but they can be (and I have) built in any of the above shapes.
It's an octagon, 14' overall = 7' span for the rafters.
Thanks