Building a Pole Barn Next Summer - Need Some Advice
Posted: Wed Aug 14, 2013 5:57 pm
Hey guys...2 years ago I helped my mother-in-law and family tear down a early 1970's vintage 60x120 Morton indoor riding arena. All of the 6x6 posts had rotted at the base and it was beginning to lean. Nobody wants the wood, so my wife and I are going to use it to build some kind of a pole barn next summer...part workshop and tool storage and part small scale livestock housing. I already have a 14x18 cement pad that was present when we bought our house...and I will simply make the footprint of the new pole barn extend beyond that pad...maybe a 26x34 with board and batten siding, a hay loft, a lean-to off the back for implements, and a metal roof.
Here's a breakdown of the materials I have available:
40 PT 6x6's....all about 12' long
25 KD doubled 2x12x16's (50 if I separate them)
30 KD doubled 2x10'x16's (60 if I separate them)
100 2x4's that average 10 or 12'
The 6x6's were preserved somehow? They don't really have that greenish PT color. I guess whatever they did in the early 70's is how these were treated...but they did rot at the surface.
I'm pretty solid with the basics...but I do have some questions about the design and loads. I was hoping somebody could help.
1) If I sink the 6x6's into the ground I gain the structural integrity of a buried timber (as opposed to setting them on concrete piers), but since these already rotted once and are 40 years old, I think I would need to protect them somehow. I thought about wrapping the lower 5' in Grace Ice and Water Shield before sinking them. Thoughts about that? How else might I prevent these timbers from rotting if I sink them?
2) If I place the 6x6's on piers, I gain the advantage of up to a 12' ceiling (as opposed to an 8' ceiling if I sink them 4' down). That would be nice for the workshop space. If I go with this option and brace the crap out of the posts do you see any reason why this wouldn't be doable.
3) Lastly, I was thinking about using the double 2x12x16's as my roof rafters. Since they are doubled, can I get away with spacing them every 2' on center, then run my 2x4 purlins across for a metal roof? I really don't want to rip them apart as they are held together by these spiral nails that are tough as hell to get out.
The wood is not punky yet, but it will be if I don't use it soon. My mother-in-law is also my neighbor, so the wood is located just down the road.
Thanks in advance guys. I apologize for the long post. I would enjoy hearing your input, suggestions, ideas, concerns, etc.
Blair
Here's a breakdown of the materials I have available:
40 PT 6x6's....all about 12' long
25 KD doubled 2x12x16's (50 if I separate them)
30 KD doubled 2x10'x16's (60 if I separate them)
100 2x4's that average 10 or 12'
The 6x6's were preserved somehow? They don't really have that greenish PT color. I guess whatever they did in the early 70's is how these were treated...but they did rot at the surface.
I'm pretty solid with the basics...but I do have some questions about the design and loads. I was hoping somebody could help.
1) If I sink the 6x6's into the ground I gain the structural integrity of a buried timber (as opposed to setting them on concrete piers), but since these already rotted once and are 40 years old, I think I would need to protect them somehow. I thought about wrapping the lower 5' in Grace Ice and Water Shield before sinking them. Thoughts about that? How else might I prevent these timbers from rotting if I sink them?
2) If I place the 6x6's on piers, I gain the advantage of up to a 12' ceiling (as opposed to an 8' ceiling if I sink them 4' down). That would be nice for the workshop space. If I go with this option and brace the crap out of the posts do you see any reason why this wouldn't be doable.
3) Lastly, I was thinking about using the double 2x12x16's as my roof rafters. Since they are doubled, can I get away with spacing them every 2' on center, then run my 2x4 purlins across for a metal roof? I really don't want to rip them apart as they are held together by these spiral nails that are tough as hell to get out.
The wood is not punky yet, but it will be if I don't use it soon. My mother-in-law is also my neighbor, so the wood is located just down the road.
Thanks in advance guys. I apologize for the long post. I would enjoy hearing your input, suggestions, ideas, concerns, etc.
Blair