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-   -   New Shed Gambrel Help (http://www.diychatroom.com/f9/new-shed-gambrel-help-157913/)

jjhann 09-25-2012 01:37 AM

New Shed Gambrel Help
 
Hello, I was wondering if I can get some assistance with my roof design.
I'm in the process of building a 12x16 shed. I have Googled everything from day one on this project and I'm almost Googly eyed from so much information and a variety of information and even misinformation.

I have all the walls up (2x4x8 16" center)and I have 2x6x12 16" center across the 12' span and attached them using only hurricane clips.(Not sure if i still need to toe nail them in on top of the wall)

My next step is to lay down my 1/2" Plywood on top of those joists and then start attaching my gambrel roof.....but I haven't figured out my gambrel roof style/dimensions yet.

I decided to go with a gambrel roof so I can have some storage space for the little guys toys, seasonal stuff, etc. I don't intend on having it as a play area or anything such. I live up in northern Canada. And we get alot of snow....alot. According to the roofing charts here it can be up to 52.5 LBS PSF. http://www.hsh.k12.nf.ca/technology/...le27/index.htm

I know gambrel roofs are hexagon and inside a cirlce and each cut is 22.5 degrees and adds up to 180 degrees....etc(thank you google)

But, I want to know if 2x4 is going to be strong enough with just 1/2" plywood gussets on each side where they join. And I don't want to go 6 ft high. It's said the height is half with width which is 12' in my case. And I don't want too flat of a roof due to the snow load.

I'm going for this exact style of framing.
http://imageshack.us/a/img850/8295/tools025.th.jpg
http://imageshack.us/photo/my-images/850/tools025.jpg/ and attaching them to the 2x6x12 joists resting on top of the walls like in this photo http://imageshack.us/photo/my-images/832/12x24loft.jpg/

http://imageshack.us/a/img832/9662/12x24loft.th.jpg


I just need advise on the dimensions of the gable/angles etc.
Sorry if it seems I over engineered everything, but I want to make sure it's not going to collapse and withstand our winters.

allthumbsdiy 09-25-2012 07:25 AM

When I built my 12x8 Gambrel shed, I used:

1. 2x4 as my wall studs but used 2x6 for the rafters, 16" O.C.

2. 3/4" CDX plywood (not OSB) for added strength (that way I did not have to use h clips to support butt joints). It's my personal believe that plywood handles water better than OSB

3. A ridge board, instead of butting rafters against each other with a gusset plate, for (perceived) extra stability

As far as the roofing height is concerned, make sure you stay compliant with your local zoning/building codes.

BTW, what is the height from the floor to your ceiling joists?

There are couple of photos at the end of this thread (http://www.diychatroom.com/f19/shed-...needed-156857/)

Good luck!


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