Pole barn Build

[samthomp85]

Hello everyone,
I am new here...and I am am seeking advice desperately...

I am building a 20x24 pole barn and I am just getting underway...I have dug holes down past grade and frost line to a depth of 24-26 inches. I had a concrete guy come and pour the footers for me and I think he did it wrong but since I am no expert I am not sure.
He put rebar down in the bottom 18 inches of the hole, filled the rest of the hole up, then capped it with a 10 inch section of Sono tube and put a CB66 bracket into the wet cement. All the cement was poured at the same time (no cold pour). Here is where I am concerned- the sono tube is only 10 inches and the CB bracket is only 8 inches on the bottom... So should I be concerned of the "tube" portion sheering off sometime down the road?

Any advice would be appreciated on this.

 

[bmxdad]

Shouldn't the beams be going down about four feet into the ground? I did a deck like that, but never seen a pole building like that.

 

[RWorth]

If that were mine I would strip the sona tube and pour the floor level with the top of the tube, and not worry about it. The only purpose the footings have is to keep it from heaving and to keep it anchored down from the wind. I wouldn't be concerned at all.

 

[cj7jeep81]

I would think it would be Ok, although not sure how you're going to cover the concrete with your wall. Also, i would be cutting down that tree on the left. Way too close to the building in my opinion.

 

[samthomp85]

I would think it would be Ok, although not sure how you're going to cover the concrete with your wall. Also, i would be cutting down that tree on the left. Way too close to the building in my opinion.

Thanks, the tree is coming out soon, just need to borrow some climbing equipment. So in your humble opinion i shouldn't have an issue not having any rebar in the tube itself?

 

[samthomp85]

Also for what is is worth I will be pouring a slab in there next summer, as well as putting a lean to for wood storage on the west side (non fenced side) Does this change anything?

 

[cj7jeep81]

I would think it's fine. If it was all one pour, the fact that the sonotube is only 10" is kinda irrelevant. It just forms the top.

How deep is the total pour? 26" sounds short to me (unless I misread your post), but depends on where you live.

 

[jackson1701]

Not sure where you're from, but in Maryland the depth of the footers have to be 1/3 the height of the walls or below the frost line at a minimum. example, if the walls are 12' tall you would have to be 4' below the ground to the bottom of the footer.

 

[bczygan]

Hello everyone,
I am new here...and I am am seeking advice desperately...

I am building a 20x24 pole barn and I am just getting underway...I have dug holes down past grade and frost line to a depth of 24-26 inches. I had a concrete guy come and pour the footers for me and I think he did it wrong but since I am no expert I am not sure.
He put rebar down in the bottom 18 inches of the hole, filled the rest of the hole up, then capped it with a 10 inch section of Sono tube and put a CB66 bracket into the wet cement. All the cement was poured at the same time (no cold pour). Here is where I am concerned- the sono tube is only 10 inches and the CB bracket is only 8 inches on the bottom... So should I be concerned of the "tube" portion sheering off sometime down the road?

Any advice would be appreciated on this.

Welcome to GJ!

Please put your location in your profile.

It seems that the poles don't extend to the bottom of the hole, like a typical pole barn. So you have qa hinge point where the bracket to post connection occurs. This needs to be resisted by "X" bracing and diagonal bracing from the post to each truss. This will give you necessary triangulation.

Your holes were 24-26" deep. The rebar is 18" up from the bottom because he didn't want it to interfere with the legs of the bracket, which extend down 8", for a total of 26". All this metal acts as reinforcing. And your foundation doesn't act very much as a vertical beam anyway, because of the connection. So you're good. Understand?

Bill

 

[bczygan]

For those wondering about this, a typical pole barn has wood columns that extend into the ground. These act as a cantilevered vertical beam. This is needed because the metal skin of a pole barn doesn't resist the racking of the structure, and there isn't enough triangulation in the joints of the posts and purlins to resist lateral forces either.

In the case above, there is no continuous column embedded into the earth to resist lateral forces, so we need X bracing for triangulation. This is a fairly small structure. Triangulation in the walls could be accomplished with plywood properly fastened on the interior walls.

Bill

 

[cj7jeep81]

My barn uses perma-columns, which are fairly similar. A 5' concrete posts is sunk 4' in the ground, and a laminated post is attached to the concrete using a similar bracket. No special bracing that I'm aware of (diagonal bracing in the corners, and normal truss bracing). Shortly after it was completed, we had some insane straight line winds (uprooted/snapped dozens of mature trees in my woods), and absolutely no problems with the building.

 

[KEH]

I see 4 trees in the pic that need to be taken down, maybe be converted into lumber. I wouldn't want a tree that could possibly fall on the barn. Actually, the 4 small trees should be taken down while th,ey are easy to handle. It cost me several hundred dollars to figure this out.

KEH