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Author Topic: 12x16 TF on treated deck frame?  (Read 1258 times)

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Offline JustPlaneBen

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12x16 TF on treated deck frame?
« on: October 07, 2017, 09:25:48 AM »
Hi folks,

I'm new to the forum and new to timber framing. I'm in the process of building a small shed/cabin in the woods. It's primarily going to be a storage shed, but I'm going to insulate it and put in a small wood stove so that it can be used as a workshop or living space. I am a builder by trade, and have some left over materials that I can use to help keep the cost down. Anyway... I decided on a 12x16 size, and set 6 concrete block piers last weekend. I have the material to do a 2x8 pressure treated deck frame, and I have rigid foam to insulate the floor. I have a couple sheets of advantech, and was going to buy a few more, and that would be the floor system. I was then planning to just build a simple stud frame with rough sawn lumber, sheath, and insulate with rigid foam. But... I think it would be a lot more fun to build a timber frame, something I don't have much experience with. It seems that the 12x16 Garden shed from Jack Sobon's book is a popular choice, and it would fit on the piers I'e already set.

So... down to my question. Being that I have the lumber to build a floor, and it will be a lot cheaper than purchasing the floor timbers from a saw mill, would it be reasonable to build a 12x16 timber frame on a PT 2x8 and advantech deck frame? In thinking it over, it seems fine to me. The 6 posts would basically sit directly above the 6 concrete block piers that I have already set. My only concern is how to attach the posts to the frame. I was thinking of doing a mortise of sorts on the bottom of each post, so that they would have a small shelf that would rest on the corner of the deck frame, and then extend 8" down so they could be through bolted to the 2x8...

I still need to get a price on timbers from a local saw mill before I commit to doing this rather than a stud frame, but I think it would be fun. Also, I live in upstate NY, so we do have snow. The floor frame is a 10" off the ground at it's lowest point (ground is not level). If anyone has any thoughts on this I'd love to hear 'em!

Ben

Offline Crusarius

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Re: 12x16 on treated deck frame?
« Reply #1 on: October 07, 2017, 09:44:21 AM »
I don't have any of the info you are looking for but I have thought about the same thing. So, welcome to the forum, I am now along for the ride. Wherabouts in Upstate ny?

Offline Dave Shepard

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Re: 12x16 TF on treated deck frame?
« Reply #2 on: October 07, 2017, 10:33:24 AM »
You can create mortises in the 2x floor framing to accept stub tenons on the bottoms of the posts. Simpson makes a variety of straps and nailer plates that you can run down the outside of the post to the sill boards and cover with siding.

I am raising a 12x16 Sobon shed at Old Austerlitz tomorrow, for the Austerlitz, NY historical society's fall festival.
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Offline JustPlaneBen

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Re: 12x16 TF on treated deck frame?
« Reply #3 on: October 07, 2017, 09:34:25 PM »
Thanks for the input. Using simpson hardware is a good idea. I was thinking of just carriage bolting it, but a nailer plate could do a nice job of tying it together. I'm up in the Adirondacks, a couple hours from Austerlitz, but I'm tempted to run down there tomorrow to observe the process.

Offline Dave Shepard

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Re: 12x16 TF on treated deck frame?
« Reply #4 on: October 08, 2017, 06:45:38 PM »
It was nice meeting you, and thanks for all the help. I'll be doing it again next year.

With a bunch of help, some volunteers, and some people roped in from the audience, we raised a 12x16 shed frame today.

A friend of mine nailing up a pine bough:

 

 
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Offline VTKubotaM6800

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Re: 12x16 TF on treated deck frame?
« Reply #5 on: April 20, 2020, 11:37:20 AM »
Hi JustPlaneBen, I know this post is quite old but I was curious if you ended up completing the TF on top of pressure treated 2x8 deck? I am about to begin a similar project and was wondering if there was anything to learn from yours.
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Offline kantuckid

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Re: 12x16 TF on treated deck frame?
« Reply #6 on: April 24, 2020, 11:32:07 AM »
I would consider the many versions of hex & torx head larger screws found in log & timberframe use now days for this Op's situation.
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