Pole depth

[Badasssapper67]

I thinking about attempting to put an addition on my pole barn. The ground slopes down into the pole barn and if I added one more section out from the ridge line It would stop the rain from getting into the pig pens.

The poles would need to be 10' 6" out of the ground. What is the ratio for 6X6 poles in ground/out of ground?

Also I figure about a foot of gravel and sand tamped down under the pole for drainage is that too much?

 

[383 240z]

I just built an addition onto my shop. The posts were buried 4-5' deep. Leaving 11-12' above ground. I poured 60 lbs of concrete in the bottom of each hole to keep the posts from sinking into the ground. The holes were 24" across. filled them with 2A limestone gravel. Keith

 

[Ray916MN]

As I understand it, the depth of poles is more driven by trying to get the bottom of the poles below the frost line to prevent heaving and less by the ratio of above ground height to below ground height. The correct depth depends on how deep the frost gets in your area.

 

[Kensgarage]

Got a picture ? How about a short retaining wall and a couple of round steel columns bolted to the top of it to support the roof ? 12 feet is pretty tall. How wide(deep) ? Can you cantilever back to the wall and skip the posts all together ? Snow load possibility ?

 

[Elginz]

As I understand it, the depth of poles is more driven by trying to get the bottom of the poles below the frost line to prevent heaving and less by the ratio of above ground height to below ground height. The correct depth depends on how deep the frost gets in your area.

+1
Easier to quote it than type it out again.

 

[Badasssapper67]

Thanks for the replies.
I had considered pulling the gutters off and making a 6' awning but I could really use the extra storage.
The frost line here is 18" but I don't think that would give the walls any stability.
Isn't the in ground depth of the uprights what provides side to side stability?

 

[sledneck32!]

Thanks for the replies.
I had considered pulling the gutters off and making a 6' awning but I could really use the extra storage.
The frost line here is 18" but I don't think that would give the walls any stability.
Isn't the in ground depth of the uprights what provides side to side stability?

No.

The metal sheathing and or lateral bracing is what provides lateral stability, as well as the roof sheeting.


I dont know standards for your area, but you might consider going beyond the 18" for the sake of keeping the posts from pulling out in strong wind.
Sent from my LG-H811 using Tapatalk

 

[Ironhorse74]

I am 50 miles north of you. I was required to be 48" into virgin soil. We poured 6" of concrete for the poles to sit on. Filled the posts below ground with 20p nails and then filled the holes with concrete.

Brad