I’m in the planning phase to build a deck and a screened in porch. I had someone draw up the plans, but have questions about the framing. The screened porch will have one gable end attached to the two story side wall of the house and the other end will have several hips to form a half octagon. I’ve been able to find enough info on framing this type of roof that I think I’m all set, but I can’t find what I think should be a pretty straight forward answer about the framing of the floor of the porch. The drawings show doubled up 2×8’s as rim joists around the base of the porch. They also show posts at each of the corners. What is the proper way to connect these posts to the rim joist under a diagonal corner? I can’t find any books or sites that show this detail.
One other question. What is the correct method of attaching the two starting rafters at the gable end attached to the house. Should these be lag bolted to the 2×6 framing of the outside wall of the house?
Thanks in advance, and I’m sure this hobbyist will have many other questions along the way.
Dave
Replies
I don't know if this was too dumb a question, not clear or just missed. I still haven't been able to find the details about the proper way to connect a post to framing at a diagonal corner.
If anyone can help, I would appreciate it.
Dave
are the posts 4x4, 6x6, or decorative columns ?
if the first two.. there would be some type of Simpson tie-down bracket to prevent uplift in our code (110 mph wind design )
if the third , the mfr. should have a detail.. or you can install a post , make your connection at the base, and drop the column over the post, then make your connection at the top to the postMike Smith Rhode Island : Design / Build / Repair / Restore
My first question to you is, how big are your posts? My second, do the posts bearing the roof load line up with the footings?
As for the question on attaching rafter to house, lags might be considered overkill by some....but I`d opt for them. I`d alternate high-low into each wall stud.
J. D. Reynolds
Home Improvements
"DO IT RIGHT, DO IT ONCE"
dave,
there are several options for info that I can think of. firstly, head to your nearest fantastic bookstore and purchase a copy of Francis Ching's "Building Construction Illustrated". This book has fantastic details, all drawn out in standard architectural format. It's a valuable tome. Next, go to Simpson's website: http://www.strongtie.com/, and take a look at the beam connectors. They make a beam connector that should tie in all your beams and posts.
Your local code shold also provide the requirements, as well.
cw
First, thanks everyone for your responses. Second, let me try to add some detail to my question. The posts I'm asking about are those between the cement footings and the bottom of the deck holding up the screened porch. The posts under the dropped beam are simple enough, I see plenty of post to beam connectors in the Simpson catalog, but I don't see a connector for at the outer points of the octagon. At these points there are two doubled up rim joists meeting at 45 degrees over a post. The posts are spec'ed at 4x4. The only connectors I see for this type of connection would require running the post all the way up and hanging the rim joists from the post. I would think I wouldn't want to do that but rather have the joists meet on top and then connect them to the post. Should I just use strapping?
Also, I'll go look for that book at lunch, but so far I haven't seen many that show detail for walls meeting at anything other than 90 degrees.
Thanks again for you help.
Dave
Dave,
I build alot of decks, some of them funkier than others. When I come across an odd angle or connection and can't find something suitable in the Simpson catalog, I usually make my own. Alot of times a good solid connection can be made with pieces of angle iron drilled to recieve lags or carriage bolts. Just be sure and paint the angle iron so it doesn't rust out. A couple of shots of black rust-oleum is usually all it takes.
Sidenote: You guys remember that little tidbit article a couple of years ago? I think it was in FHB maybe JLC where the guy dadoed his posts and beam to fit a framing square in? He used this as his post to beam connection and it made it into the rag! I just remember that fallout around here!
http://www.strongtie.com/products/DIY/GTF.html
Also, these arre pretty versatile,
http://www.strongtie.com/products/connectors/L-LS-GA.html
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Edited 3/2/2004 6:45:10 PM ET by piffin
See below: The you can use 2 'T' brackets to attach things together.
SamT
View Image
Thanks for the picture, that is exactly what I'm looking to do. I'm still a little confused by this. I can see where one T bracket would go on the flat side, where would the other go, on the inside with a bend?
Dave
Put 1 "tee" on the side of the post that parallels where you cut the corer of the joist offg and the other on the oposite side of the post. Both "tee"s will have a bent leg going onto the angled joist.
Center the vertical leg of the "tee" on the post, which should center it on the joint vetween the 2 joists.
These are the ribbon joists of the floor, Right? This diagram will work for the roof joists also, but how are you planning to tie-down the floor and roof and walls(?) to the foundation?
SamT