What Size Sonotube For 6X6 Post?

The right sonotube size can make all the difference when it comes to building a strong, stable fence post. Without the appropriate size and amount of support, your fence will not stand up to the elements or expand properly. We know that it can be challenging to figure out what size of a specific piece you need for any given project, especially with so many different sizes available.

If you’re searching for an answer about what size Sonotube is best for 6×6 posts, you’ve come to the right place! Keep reading for all the information you need about choosing the correct size of sonotube for your project.

The Basics of A Sonotube

First things first, let’s talk about what a Sonotube is. A Sonotube is a large, corrugated tube made of polyethylene plastic. They’re often used in construction projects because they’re lightweight, easy to transport, and are resistant to rot, mold, and corrosion.

Sonotubes are available in various sizes, and many even come with pre-punched holes for easy onsite placement. The primary use for a Sonotube is as a concrete form. They are often used to line the inside of the concrete forms for slabs, walls, and footings.

The inside of the tube is corrugated to allow for the concrete to be drawn upward, forming a smooth wall. Once the concrete sets, the form is removed, leaving a strong and sturdy concrete structure.

6X6 Sonotube Size

Let’s start with the 6×6 post size. A 6×6 post is ¾ inches by 6 inches by 6 feet long. That means that you need to support the post with a 6×6 sonotube that’s ¾ inches thick and 6 inches wide. If you try to support the post with a smaller sonotube, you risk post failure.

A 6×6 post requires a large amount of support to properly fill the holes and stand up to the elements. The 6×6 size is one of the more common post sizes used on farms and in commercial settings, so you can easily purchase the correct size of sonotube. You can purchase these in bulk at many home improvement stores, and they are often available online at a cheaper price. Make sure you know exactly what size you need before you buy!

What Size Sonotube Is Best For 6X6 Posts?

Now that we know that you need a ¾-inch by 6-inch by 6-foot sonotube for a 6×6 post, the next question is what size sonotube is best for 6×6 posts?

If you look at a chart or sonotube sizing guide, you’ll notice that the 6×6 is actually listed as a “minimum”. That means that you should use the next size up. Always use the minimum size that will hold your post in place, but don’t go any smaller than that. The proper size sonotube will provide additional support around the outside of the post itself. That way, the post is held in place tightly, but there is still room for the concrete to be drawn upward.

How to Determine the Right Size For Your Project

Figuring out how to size your sonotube starts with knowing the size of your post. If you want to build a 6×6 fence post, you need a 6×6 post. If you want to build a 5×5 post, you need a 5×5 post. Simple enough, right? Not necessarily.

After you determine the post size, you also need to know the depth of the post hole. A post hole that is 10 inches deep will receive a post that is 10 inches long. However, a post hole that is 16 inches deep will receive a post that is 16 inches long. The depth of the hole will affect what size of sonotube you need to support the post.

Is a 7-inch sonotube the same as a 6×6 post

A 7-inch sonotube is ¾ inch thick by 7 inches wide by 7 feet long. That is slightly larger than the recommended 6×6 sonotube size.

Is that the same as a 6×6 post? No. A 7-inch sonotube is a different size than a 6×6 post. A 7-inch sonotube is typically used for footings on slab construction. It might also be used to support 4×4 posts. A 6×6 sonotube is typically used for 6×6 posts and is the correct size for a fence post.

The 7-inch sonotube is much larger than the 6×6 post and would not provide the proper amount of support. A 7-inch sonotube could provide too much support, causing the concrete to sink and leaving gaps in the post itself. A 6×6 sonotube is the correct size for a post and will provide enough support for a fence post.

Conclusion

Now you know all you need to know about what size sonotube is best for 6×6 posts. A 6×6 post is ¾ inches by 6 inches by 6 feet long, so you need a ¾-inch by 6-inch by 6-foot sonotube to support it. A 6×6 post requires a large amount of support to properly fill the holes and stand up to the elements.

It is recommended that you use the minimum size of 6×6 sonotube for a 6×6 post. If you have any questions about what size sonotube is best for 6×6 posts, feel free to leave us a comment below. We hope you found this information useful and can put it to use on your next project!

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