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Old 07-04-2009, 09:57 PM   #1
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Need help building this structure


I need to build this structure for my riding lawn mower. It will be 10'X 8'











I'm planning on using 6 4x4 posts to support the roof. Do you think this is sufficient?

I also need to now how to attach the roof structure to the posts. I was thinking about just going around the perimeter of the posts with dimensional lumber. I would then just cut bird mouth cuts into the rafters. I just need sizes of lumber or a better way to attach the roof. Instead of birds mouth cuts, I could use simpson ties at the top and even or just at the top and use a birds mouth at the eve. Any help would be greatly appreciated.

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Old 07-05-2009, 08:28 AM   #2
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Need help building this structure


Go to your local big box store and look at the sheds on display. Build it that way. Use t-111 plywood, not dimensional lumber for the exterior. For specifics I would buy a framing book or a book of shed plans.
Ron

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Old 07-06-2009, 09:47 PM   #3
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Go to your local big box store and look at the sheds on display. Build it that way. Use t-111 plywood, not dimensional lumber for the exterior. For specifics I would buy a framing book or a book of shed plans.
Ron
The structure will have no siding. The posts are just to hold up the roof structure. The sides will just be open.
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Old 03-26-2010, 02:04 PM   #4
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Need help building this structure


Sorry to bring back an old post, but I still need to build this structure. I'm hoping to build it before this summer. I checked with my local code enforcement office and do not need a permit due tot he size. I'm basically trying to build a carport type structure. It will be comprised of 6 poles and a shed roof. I live in Florida, so there is no snow load. Can someone give me some suggestions?

Here is what I'm planning to do:

- 6 4x4 pressure treated poles
-I will use 2x8 to surround the tops of the post.
-2x6 for the rafters spaced at 16"
-I will use birds mouth cuts to attach the rafters (with hurricane anchors)
I could also just use


Any suggestions would be appreciated
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Old 03-26-2010, 02:18 PM   #5
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Need help building this structure


Would it be better to use simpson rafter hangers instead of bird mouth cuts?
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Old 03-26-2010, 02:47 PM   #6
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Need help building this structure


Your diagram is hard to read, but it looks like you want a flat roof. If that is what you want, I would definitely use Simpsons, then again I use them for everything anyway. You need to anchor the posts into the ground, I suggest you buy a book on framing and foundation design, follow the recommendations. There are many posts on this forum regarding proper methods for attaching a post to a concrete footing, I suggest you do a search and read them for good information on techniques and practices for foundations.
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Old 03-26-2010, 04:00 PM   #7
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Your diagram is hard to read, but it looks like you want a flat roof. If that is what you want, I would definitely use Simpsons, then again I use them for everything anyway. You need to anchor the posts into the ground, I suggest you buy a book on framing and foundation design, follow the recommendations. There are many posts on this forum regarding proper methods for attaching a post to a concrete footing, I suggest you do a search and read them for good information on techniques and practices for foundations.

Thanks for the help. I'm really concerned about the roof structure. I did some research on pole foundations. All of the books I have looked at only show stud framing with different types of foundations. The roof will have a 4/12 pitch. It will look something like this:






I could just frame it with header spanning the tops of the posts like the picture. Is this the best method? I'm not sure how a birds mouth cut would work on a 2x6 piece of lumer also. There isn't much to notch out. I guess I'll try some more framing books.
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Old 03-26-2010, 05:06 PM   #8
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Need help building this structure


A little surprised the code folks in FL don't care, but that's up to you.

a good DIY project is one you feel confident about. Maybe even push it a bit for a fun challenge.

A lot of ways this can be designed. Post & Beam framing (if you can't find a good referance book ) you could go with what you know. Like set post straight, true and plum... ok to leave them a little high..better to trim then be to short. You could hang out at the lumber yard or box store or ask some buds if they know a framer that could give you some pointers for beer or a few bucks.

We don't get a lot of snow in FL, but we sure get wind and rain.
Glad the pic you posted had an overhang...that means you will need a bird mouth..H clips...straps.. would be good too....helps put the roof /wind load to the beam...that carries the load to the post...that carries the load to the footing / post depth.

There is much to consider on proper post size & depth for the soil conditions, water table ...etc.. (assumed sandy FL).

good luck and stay safe. Good building practice keeps you and your neighbors safe too.
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Old 03-27-2010, 09:58 AM   #9
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Need help building this structure


I am not certain what your question is/are....it seems you have the whole this figured out......depending on the roofing material you could even go 24 oc.....good luck and post a pic when you are done....
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Old 03-27-2010, 10:28 AM   #10
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Need help building this structure


I'd use 2x4 rafters 24"oc with 2x8s top and bottom and some 1x4s ripped in half across the 2X4s. Id also do a flatter roof in florida; since you wont have a snow load, you only need enough pitch for the watter to drain. extra pitch = extra wind load. becaus its got no sides, I'd do about 2' overhangs. I believe you can get 12' metal roof pannels as a standard size. no birds mouths needed. rip aq slight angle on the 2x8s if you want. maby straps to hold the roof down.


Last edited by forresth; 03-27-2010 at 10:37 AM.
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