Decks, Patios, Porches and Docks - Pool side deck -Pergola - help
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gsiciliano
05-02-05, 03:27 PM
I built a deck in the corner of my yard level with my ingound pool. I would now like to build a corner pergola/Arbor to go over the deck since it gets lots of shade, but cannot find any design ideas. All are based on four symetrical posts. Any ideas out there with three posts???
thx
thx
bradleyfitz
05-03-05, 01:10 PM
I've seen a few corner pergola's while searching google to find a design I liked for my pergola. I recall two different designs, but the the one that stands out in my mind had a beam running from post 1 to 3, then with the rafters going from post 2 (the corner post) to the beam, in an even distribution. The corner post also had a small beam attached to it so that you can place the rafters on top of it.
Looked good.
Looked good.
gsiciliano
05-03-05, 09:07 PM
Thx for the input.
How was the small beam attached to the corner post?
How was the small beam attached to the corner post?
bradleyfitz
05-04-05, 08:45 AM
Hmm, I'm not entirely sure. The top of the posts may have been slotted to accomodate the beams, as they couldn't be mounted flush with the posts. I'm sure there are several different ways of doing it, I did a quick search, and here's an example:
http://www.woodstylejoinery.co.uk/images/pergcorn.jpg
http://www.woodstylejoinery.co.uk/images/pergcorn.jpg
gsiciliano
05-04-05, 06:10 PM
thank you. Interestingly enough it was the only one I could find when I did a google search. My deck is substantially larger and I am concerned that the front beam running from post 1 to 3 (roughly 14 ft) would not be strong enough to support all the rafters. Also there will be serious bunching at the corner post if all the rafters fan out at a reasonable spread.
lefty
05-04-05, 07:25 PM
gsiciliano,
Where are you at??
The 2 biggest concerns you will have will be snow load and wind load. Spanning the 14' can be done, providing that you use the right stuff and have the proper footings. (I just sold an aluminum pergola where the beam will span 18' -- the 3X8 beam will have a steel "C" beam inserted in it, and the footings under each post are 18" cubes of concrete.)
In your case, the beam at post #2 will sit on top of the post and have to have side plates to attach the beam to the post. You can probably cantilever the beam 2' in each direction from the center of the post and let the rafters fan from there. If 4' of beam at post #2 isn't enough, use 2 posts instead of 1. The maximum spacing between your rafters at the outer beam will be 24" -- maybe less if snow is an issue.
How far will the rafters be spanning? The maximum span will be from post #2 to posts #1 and #3.
Where are you at??
The 2 biggest concerns you will have will be snow load and wind load. Spanning the 14' can be done, providing that you use the right stuff and have the proper footings. (I just sold an aluminum pergola where the beam will span 18' -- the 3X8 beam will have a steel "C" beam inserted in it, and the footings under each post are 18" cubes of concrete.)
In your case, the beam at post #2 will sit on top of the post and have to have side plates to attach the beam to the post. You can probably cantilever the beam 2' in each direction from the center of the post and let the rafters fan from there. If 4' of beam at post #2 isn't enough, use 2 posts instead of 1. The maximum spacing between your rafters at the outer beam will be 24" -- maybe less if snow is an issue.
How far will the rafters be spanning? The maximum span will be from post #2 to posts #1 and #3.
gsiciliano
05-04-05, 07:37 PM
I am in Toronto.
Post #2 (the corner post) is exactly 10ft away from posts 1 and 3. Both posts are in concrete buried 4 feet down elow freezing.
One thought was to have beans spanning between all three (aerial view would look like a triangle) posts, and then span the rafters across them so the longest span rafter would be from post #2 and the other rafters would get shorter as you got closer to the outer posts.
Post #2 (the corner post) is exactly 10ft away from posts 1 and 3. Both posts are in concrete buried 4 feet down elow freezing.
One thought was to have beans spanning between all three (aerial view would look like a triangle) posts, and then span the rafters across them so the longest span rafter would be from post #2 and the other rafters would get shorter as you got closer to the outer posts.