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Posted by marson on March 10, 2007, 9:17 am
On Mar 9, 8:30 am, sir.eggplanta...@gmail.com wrote:
> Hi all,
>
> I have a 24x12 shed/mini barn constructed of 2x4's (walls, rafters).
> I would like to expand the footprint of the shed to 24x16. To do so I
> am planning on building a 16 ft wide floor (did I mention that the
> shed doesn't have a floor?) under the shed, and extending the back
> part of the roof at the its current pitch (1/2) to meet an
> approximately 5ft tall wall at the 16 foot mark. So the new building
> would have a front roof span of 6.5 feet, and back roof span of
> approximately 11.5 feet.
>
> I am considering either leaving a beam where the current back wall is
> (supported at 8' intervals) and just adding the additional approx 5ft
> roof made from 2x4s attached to this beam. This would be easiest and
> wouldn't change the shed much structurally (since it has mostly doors
> on the back anyway) but would leave pesky posts w/in the building.
> Another approach would be to sister the current 2x4 rafters (which are
> currently about 6.5 feet long) with 2x6's to span the 11ft (span
> tables show that they can handle it). But how to do this - is it okay
> to simply nail these larger rafters to the existing 2x4s and forget
> about it, or do I need to add additional cross bracing from the 2x6's
> to the front part of the roof (i.e. re-inforce the horizontal member
> which connects the rafters from the front and back parts of the roof,
> the name of which I can't remeber). Also would it be necessary/
> recommended to beef up the front part of the roof? Or is there a
> better way?
>
> Any and all input is welcome. Thanks in advance for your input.
> don
really could use a picture
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