building a free standing carport.?
what is the best way to anchor 6x6 treated post on a 22x22 carport with a hip roof with 8/12 shingle roof system? can it be done without setting posts in concrete in hurricane zone?
it is going to be an all hip roof, don. the reason for 8/12, the customer wants it to match roof pitch on house. my concern is; without setting posts in concrete, whats to stop high wind from blowing it down? there will be 7 posts; 3 left, right and back with an open front. lbl headder with 2x12 sides and rear(doubled of course). i justdont like the idea of setting treated posts in concrete. it doesnt last long enough.
what if the tree blows over pauline?
i want to thank everyone that took the time to answer this, they were all helpful in their own right, but i have to give it to nick. i dont think i'll be able to use his suggestion, but im going to take it to the homeowner. again, thanks all.
- 1 decade agoFavorite Answer
If it werent for that 8/12 all hipped roof I would lend some help besides the fact that it is free standing. That is going to be one crazy looking carport. Its going to look like a pavilion with a really large, bad hat on it. The only advice I'll give is to crossbrace between your 6x6 uprights and the lvl beams that will be necessary to hold this behemuth up.Source(s): general contractor
- DonLv 61 decade ago
This thing is going to be huge! Of course you are going to need some concrete. How many posts are you setting? Four six by six posts will not support a building of that size. You would need huge beams, LBL probably, to make that span. In a hurricane zone, (I live in New Orleans), you can reduce the wind load by building an all hip roof. Why 8/12? This thing is going to be 18 feet tall, with a low ceiling height.
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- DarleneLv 44 years ago
If you can get at the top of the concrete block wall to rest the rafters of the carport roof on that wall, you'll save some money on materials. Just nail the rafters to the existing ones. You'll need to cut a slot in the roof sheathing to get the angle you need to have it high enough on the other side. If you are going with a gravel surface inside the carport to keep costs down, just sink some 4x4 posts below the frost line and fill the hole around the 4x4 with concrete. Set the posts on some gravel in the bottom of the hole and brace them plumb until the concrete sets up. I mix it with water right in the hole, then let it sit a while and come back and make it slope away from the post before it hardens completely. then tie the posts together with your framing lumber, big enough to carry the weight of the roof. Use the inexpensive hanger hardware you can get at a lumber yard to provide some extra strength to the set up, especially if you live in tornado or hurricane country
- 1 decade ago
You can build this without setting your posts in concrete. I would double check with your code enforcement office about using drilled in anchors. My experience has been to use J or L anchors embedded into the columns/footings once poured. Depending on your zoning, your footing may need to be anchored to your column with some type of anchor, in addition to the anchor you use in your column for your base/stand-off plate. To additionally resist up-lift, I run 4 straps up my posts and over my LVL. 2 up the front and over, then two up the back and over, starting at least 8 inches down from the top of the post. I have also been required to use G8 bolts/lock nuts and plates to bind the posts/beams. It just depends on the zone requirements. I just strongly urge you to not drill your anchors, but to embed them into the column when you're pouring. Happy building.
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- Douglas RLv 41 decade ago
yes, THEY have some anchors that can be drilled into the concrete.Don't know where you live in Georgia the post have to be setting on brackets or a way to keep them off the concrete.Might get some cables and some Mobile home Tye downs they seem like they might get you there.Got to secure them someway L brackets.
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- outg426Lv 41 decade ago
you need to check with your local zoning office, they will answer this correctly. i would think that you could fasten a metal anchor to the concrete then attach the post to the anchor, but do check to make sure