How Long Will A 6×6 Post Last In Concrete?

How do you set a 6×6 post in concrete?

Step-By-Step Instructions:Dig the post hole, making it three times the width of the post and at a depth equal to 1/3 to 1⁄2 of the above-ground length of the post, plus 6″ (right).

Pour 6″ of gravel or crushed stone into the bottom of the hole.

Set the post in the hole.More items….

How big of a hole do I need for a 6×6 post?

10″Dig an 8″-diameter hole at least 6″ deeper than your area’s frost line for each 4×4 post, using a power auger, hand auger, or post-hole digger. A 6×6 post requires a 10″-diameter hole.

Why deck posts should not be set in concrete?

A deck post should always be placed on top of footing, not inside concrete because it can break. When concrete is poured around a deck post in this way, the post will rot due to moisture buildup by the soil. …

Why is there a shortage of pressure treated wood?

And more expensive. Mills shut down when the coronavirus began circulating, so there’s less wood available for people spending vacation money on their homes. A cascade of delays has led to a shortage of pressure-treated lumber.

How big of a hole do I need for a 4×4 post?

A general rule of thumb is to dig the diameter of the hole at least 3-4 times the diameter of the post. For example, if setting 4 x 4 wood posts, dig holes 9-12″ in diameter. Posts should be centered in the hole and the posts should always have concrete under them.

How long will a treated 6×6 post last in the ground?

40 yearsThe treated post that are rated for ground contact are guaranteed for 40 years.

Do pressure treated posts rot in concrete?

A: Actually, your point is well taken. Simply setting the posts in concrete does create a condition that will accelerate rot in the bottom of the posts. With pressure-treated posts, the rot will be slow. … Concrete should be poured around the post – no concrete under the post.

How long will a treated post last in concrete?

5 to 10 years4 Answers. A PT post will last a long time in concrete, maybe 5 to 10 years in soil alone. I suggest you embed the post in concrete, trowel a peak around the post so water runs off, and don’t let the PT post come in contact with the ground.

Should I use 4×4 or 6×6 for pergola?

To adequately support the lumber overhead as well as give the pergola a sturdy look, you’ll probably need to use 6×6 for the support posts. For a very small pergola with only 4 to 6 feet between posts, 4×4 supports will work.

Will pressure treated wood rot if buried?

Pressure-Treated Wood Makes the Grade Pressure-treated wood in contact with the ground needs the most protection, and will rot in just a few years if you use the wrong grade. … If your wood will touch the ground or be buried, you should get the highest grade you can, up to .

How strong is a 6×6 post?

For a 6′ long post of fir, 10,000lbs is right. Says this. When we build shoring for building collapses/urban search & rescue, our go-to guide is from the US Army Corps of Engineers. As this screencap from it will tell you, a 6×6 post can support 20,000 even when 12′ high—if cross-braced and secured properly.

How do you keep pole barns from rotting?

Pressure-treated wood is one way to deter fungi from your pole barn posts. The wood is infused with chemicals, keeping fungi away. In addition to providing pressure-treated wood, DIY Pole Barns offers several options to further protect your pole barn posts from moisture, keeping them strong and dry for years to come.

Is 2 feet deep enough for fence posts?

The minimum depth that you should dig your fence post holes for panel sections is 2 feet. A general formula is to dig the holes one-third to one-half of the post’s aboveground height. The deeper you dig the holes, the more stability your fence has, but you must also purchase longer posts.

How long will a pressure treated post last in the ground?

The Forest Products Laboratory and other research groups have shown that treated wood stakes placed in the ground for more than 40 years remain rot-free. But young pressure-treated decks, many less than 10 years old, are being shoveled into landfills.

How long will a pressure treated 4×4 post last in the ground?

40 yearsThe treated post that are rated for ground contact are guaranteed for 40 years.

How deep do you bury a 6×6 post?

The depth of your hole should be about 1/4 of the height of your post. For a 6×6 post, the diameter of the holes should be about 12 inches square. As a rule the width of your post hole should never be less than 10 inches. You want holes deep and wide enough to easily support a standard 4×4 post.

What size sonotube for a 6×6 post?

The rule-of-thumb is to use a tube diameter 3 times the post width, therefore use a 12” diameter Sonotube for a 4×4” post.