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Question about extending posts for roof over deck steve 08-16-2006
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Posted by on August 16, 2006, 10:46 pm
Hello,

I'm debating adding a roof to my outside deck. The exisiting deck is
only a year old and and is overbuilt when it comes to code. I have a
perimeter of 6x6s and 6x6s underneath the deck area as support with
concrete footers under all posts. I hae double and triple banded 2X10s
along the perimeter as well. I originally was going to put a massive
hot tub on it but changed my mind (maintainance).

The 6x6s come up to the railing height of the deck. Is it possible (or
safe) to extend the 6X6s another 4 or 5 feet so I can build a roof
extending from the side of the house? I didn't know if this is an
acceptable practice or not. Would I use some type of metal fasteners
and dowels to accomplish this, or am I barking up the wrong tree? Any
thoughts or advice? I would certainly appreciate it.

Steve


Posted by Bob Morrison on August 17, 2006, 10:32 am
In a previous post steve@rnr-tech.com wrote...
> The 6x6s come up to the railing height of the deck. Is it possible (or
> safe) to extend the 6X6s another 4 or 5 feet so I can build a roof
> extending from the side of the house? I didn't know if this is an
> acceptable practice or not. Would I use some type of metal fasteners
> and dowels to accomplish this, or am I barking up the wrong tree? Any
> thoughts or advice? I would certainly appreciate it.
>

It's probably possible with a bunch of custom made steel hardware, but I
doubt if there is any "off-the-shelf" stuff that could be made to work.

The connection must be made to allow for wind, seismic and roof live loads
(usually snow). I suggest hiring a local engineer to design a connection.

BTW, this will also require a building permit.

--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com

Posted by on August 17, 2006, 12:47 pm
Thanks, Bob.

Are there any other typical methods to handle this? I really just want
to put some sheet metal up there and that's it.

Steve


Bob Morrison wrote:
> In a previous post steve@rnr-tech.com wrote...
> > The 6x6s come up to the railing height of the deck. Is it possible (or
> > safe) to extend the 6X6s another 4 or 5 feet so I can build a roof
> > extending from the side of the house? I didn't know if this is an
> > acceptable practice or not. Would I use some type of metal fasteners
> > and dowels to accomplish this, or am I barking up the wrong tree? Any
> > thoughts or advice? I would certainly appreciate it.
> >
>
> It's probably possible with a bunch of custom made steel hardware, but I
> doubt if there is any "off-the-shelf" stuff that could be made to work.
>
> The connection must be made to allow for wind, seismic and roof live loads
> (usually snow). I suggest hiring a local engineer to design a connection.
>
> BTW, this will also require a building permit.
>
> --
> Bob Morrison, PE, SE
> R L Morrison Engineering Co
> Structural & Civil Engineering
> Poulsbo WA
> bob at rlmorrisonengr dot com


Posted by Bob Morrison on August 17, 2006, 5:32 pm
In a previous post steve@rnr-tech.com wrote...
> Thanks, Bob.
>
> Are there any other typical methods to handle this? I really just want
> to put some sheet metal up there and that's it.
>

Steve:

I suppose it would be possible to sister on some 2x4's each side and set a
piece of 6x6 on top of the existing 6x6. The length of "sister" and
number of fasteners will depend on your location.

I will repeat my earlier statement that since this is structural change it
will require a building permit. It will be a lot easier to get a permit
now than to have to do so retroactively.

--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com

Posted by on August 19, 2006, 9:32 am
Thanks, Bob. I'm going to hold off for awhile.


Bob Morrison wrote:
> In a previous post steve@rnr-tech.com wrote...
> > Thanks, Bob.
> >
> > Are there any other typical methods to handle this? I really just want
> > to put some sheet metal up there and that's it.
> >
>
> Steve:
>
> I suppose it would be possible to sister on some 2x4's each side and set a
> piece of 6x6 on top of the existing 6x6. The length of "sister" and
> number of fasteners will depend on your location.
>
> I will repeat my earlier statement that since this is structural change it
> will require a building permit. It will be a lot easier to get a permit
> now than to have to do so retroactively.
>
> --
> Bob Morrison, PE, SE
> R L Morrison Engineering Co
> Structural & Civil Engineering
> Poulsbo WA
> bob at rlmorrisonengr dot com


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