carport

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Old 07-10-12, 02:32 AM
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carport

if you have time to visualize or instruct me where i should research more , i will be in depth of gratitude

Lets assume.


Gravel bed 4 '' thick

Six 4x4 PT posts

2' deep in ground
3 posts 9' above ground, and 3 posts 7' above ground (slope=1/7)
spacing between posts 13' 3.25''width, and 9' 5''length

Framed using 2x4x14 and 2x4x10 and 3'' screws

24 joist hangers and 12 2x4x10 rafters
spacing 24''

15' 26 gauge galvalum


is it okay to place 4x4 pt posts in the dirt with no concrete?

post spacing suitable?

do posts need braces ?

is rafter spacing suitable?

is 10.3'' too much galvalum overhang ? ( 2.3'' overhang on 9' side, 8''overhang on 7' side)

is this too much weight on 6 poles?

will the carport collapse?

will the carport lean?



im just trying to build a sturdy long lasting carport CAP
 

Last edited by flatbread; 07-10-12 at 03:28 AM.
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Old 07-10-12, 06:16 AM
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How large will your carport be? It's impossible to say much about the structure without knowing it's size to guess at what your spans will be. Without knowing I'd say 2x4's are too small unless you are building trusses (which probably will require engineering and a Professional Engineers stamp).

Check with your local zoning and building inspection departments. If your structure falls under their jurisdiction they may specify if a pole structure is allowed and what it's minimum construction must be.

4x4" posts might be OK with proper bracing but I prefer 6x6" for extra rigidity. I think it also helps the appearance. With just 4x4 the roof might look to be held up with toothpicks.
 
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Old 07-10-12, 01:16 PM
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14' x 20' Carport
no trusses, this is a lean to type with a (flat roof)--- slope 1/7

6x6 posts
2x6 strong enough
if using the above would it need braces, and is it okay to place the posts in the dirt without concrete
 
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Old 07-10-12, 01:24 PM
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Just look at the span tables for dimensional lumber. They will give you the sizes and span distances for various types of wood. I'm not sure what you get in TX.

Here is a link to a .pdf put out by the American Wood Council that should get you started.
 
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Old 07-10-12, 03:09 PM
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You can't span over 11' with a 2x6, so that is out. Use the span tables Dane suggested so you can get a good support for your lean to type roof. Don't forget proper overhang on both ends. I am not a fan of posts in holes with concrete. However if you didn't do it, soon there would be no more fences separating suburban back yards . Once your hole is excavated, be sure to use gravel in the bottom to aid in drainage, make your pour and taper the top of the pour down and away from the post. This may aid in shedding water away from the core of the wood.
 
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Old 07-10-12, 06:19 PM
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galvaloom runs north/ south

east/west dimensions 10' 'OD ' (posts,)
suppose 2x6s are adequate spaced 24'' apart.


north.south dimensions 14' 'OD' (posts)
suppose 2x8's for beams


correct me if i am wrong, but the only way to ensure the posts do not rot (wood) or rust (steel) is to have a concrete slab (w/ adeqate footing) and walls. i.e. a garage
 
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Old 07-11-12, 01:15 AM
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Carport Project page 2

is there anyhting wrong with the above free standing carport?
putting sheet metal as the roof
 
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Old 07-11-12, 04:20 AM
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Nothing at all. They just didn't address the issue of placing a parachute on your driveway with your car under it. First good wind and it's gone. You should use Simpson Strongtie post bases fastened to the concrete and the posts fastened to the top of the base. Go to their site and view post bases. You will get the idea.
 
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Old 07-11-12, 03:26 PM
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if the carport posts were placed 6 inches deeper than frostline with concrete would carport still be considered a parachute
 
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Old 07-11-12, 03:33 PM
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It would be better to pour concrete down to the frost line with post base inserted in the concrete where it comes above the ground. That way you don't have to worry about the post rotting in the ground.
 
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Old 07-11-12, 05:53 PM
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please see my attachment.
is this what you are talking about?


i remember my father doing this with a privacy fence. 10 years later the footing tilted so bad the fence fell into the road. guess he did not pour down to the frost line
 
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Old 07-11-12, 06:19 PM
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Nope, more something like this after your footing is poured....ABW Post Base
 
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