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Building Construction - Building Construction Industry Discussions.
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Posted by No Spam on April 20, 2007, 3:06 pm
I'm considering putting in a patio roof attached to the house. It will
have typical composition shingles to match the existing roof. I'm just
doing some background investigation on costs, feasibility, etc. I'd
like a hip roof (don't think that makes a difference) about 13 ft
square. I was hoping to put up only two posts. I'm located in Central
TX - freezing is not a problem.
I will build a deck under the patio, but will make it completely
self-standing - the load from the deck will not need to be added to load
on the roof posts. The deck will likely come before the patio roof, so I
don't want to tie the two projects together. I might pour the roof post
piers at the same time I build the deck.
Questions:
1) What size posts? I was thinking 6x6 would be enough (I know this
needs to be calculated out). The posts will be about 9' long from the
tops of the piers to the beams.
2) What size beam would be required between the two posts?
3) What size beam would be required from the posts to the existing wall
header. Probably the same size?
4) It is possible or likely that the existing wall header will need to
be beefed up? One beam will be right over a patio door and the other
over a set of windows.
4) What diameter piers would be required for the posts and what depth?
I'll get an engineer, inspections, permit, etc, but I would like to have
some background info before I talk to anyone. Or possibly rule out the
project before I spend any money on it.
Hopefully, I didn't forget any pertinent details.
Thanks!
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Posted by Dave on April 21, 2007, 1:18 am
> I'm considering putting in a patio roof attached to the house. It will
> have typical composition shingles to match the existing roof. I'm just
> doing some background investigation on costs, feasibility, etc. I'd like
> a hip roof (don't think that makes a difference) about 13 ft square. I
> was hoping to put up only two posts. I'm located in Central TX - freezing
> is not a problem.
> I will build a deck under the patio, but will make it completely
> self-standing - the load from the deck will not need to be added to load
> on the roof posts. The deck will likely come before the patio roof, so I
> don't want to tie the two projects together. I might pour the roof post
> piers at the same time I build the deck.
> Questions:
> 1) What size posts? I was thinking 6x6 would be enough (I know this needs
> to be calculated out). The posts will be about 9' long from the tops of
> the piers to the beams.
> 2) What size beam would be required between the two posts?
> 3) What size beam would be required from the posts to the existing wall
> header. Probably the same size?
> 4) It is possible or likely that the existing wall header will need to be
> beefed up? One beam will be right over a patio door and the other over a
> set of windows.
> 4) What diameter piers would be required for the posts and what depth?
> I'll get an engineer, inspections, permit, etc, but I would like to have
> some background info before I talk to anyone. Or possibly rule out the
> project before I spend any money on it.
> Hopefully, I didn't forget any pertinent details.
> Thanks!
Just pour some piers to build the deck frame off of. Then, put the roof on.
Suggest 10X10 piers, flush with the subfloor framing outside corners. 2'
minimum depth into undisturbed soil. The depth should equal or exceed the
height of the pier. The soil consistency seems to depend if you're east or
west of I-35. Lot more rock west.
You can put the posts on top of the subfloor. 4X4 treated is fine for post
since its just holding up the roof, not ice and snow. Consider hurricane
straps on all the posts, top and bottom. Rafters too.
I'd use 2X10 treated lumber for headers/beams. Consider treated plywood
between. Use 1/4" galvanized bolts/nuts/washers to make the beams.
Consider a skirt of some sort around the subfloor framing. Cheapest is
plastic latticework.
Think you mean 13' each side, not 13' square.
--
Dave
Apathy and denial are close cousins
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> have typical composition shingles to match the existing roof. I'm just
> doing some background investigation on costs, feasibility, etc. I'd like
> a hip roof (don't think that makes a difference) about 13 ft square. I
> was hoping to put up only two posts. I'm located in Central TX - freezing
> is not a problem.
> I will build a deck under the patio, but will make it completely
> self-standing - the load from the deck will not need to be added to load
> on the roof posts. The deck will likely come before the patio roof, so I
> don't want to tie the two projects together. I might pour the roof post
> piers at the same time I build the deck.
> Questions:
> 1) What size posts? I was thinking 6x6 would be enough (I know this needs
> to be calculated out). The posts will be about 9' long from the tops of
> the piers to the beams.
> 2) What size beam would be required between the two posts?
> 3) What size beam would be required from the posts to the existing wall
> header. Probably the same size?
> 4) It is possible or likely that the existing wall header will need to be
> beefed up? One beam will be right over a patio door and the other over a
> set of windows.
> 4) What diameter piers would be required for the posts and what depth?
> I'll get an engineer, inspections, permit, etc, but I would like to have
> some background info before I talk to anyone. Or possibly rule out the
> project before I spend any money on it.
> Hopefully, I didn't forget any pertinent details.
> Thanks!