Concrete anchoring question - your opinion?

[Robert]

Hello,

I am building a pool deck and want to place a 15'x18' cabana (four columns, roof) on top of it. The cabana is held up by 8x8" posts and has a shingled roof. My question is because the cabana company wants to have the pool company pour the deck, making it a bit thicker where the posts will be, and then use concrete anchors to anchor the posts to the pool deck. The pool company thinks they should place the posts before they pour the deck so they are set in the concrete instead, making it sturdier...any opinions?

Thanks,

[John]

IMO that would also make them rot faster.

Wood and concrete should not be in contact with each other, that's why there are so many different fasteners to connect the two while leaving an air space between. The concrete holds the moisture which then rots the wood.

Get one of these commercial (galvanized preferably) devices that either installs before or after the pour and then connects to the post.

[Bill]

Are the posts wood?

From the below link (1/4 of the way down)...

[Another serious problem is occurring concerns support posts and footings. When support post are put into the footing, and even the ground, they are prone to rot. Even pressure treated posts, including 6x6's may completely fail within a few years.

The problem occurs when the post is put into the ground, and concrete is poured around the post. Once the concrete has set, the post has established a pocket in which water can collect. The water is absorbed into the post and cannot dry out. In colder climates the water freezes and can crack the concrete. Additionally, the deck should be bearing on top of the footing and not in it. Some people are under the misconception that pressure treated wood will not rot. ]

[JTM]

The cabana people know what is required for their product. The concrete should be poured with proper sized footings for the posts--deep enough to anchor the L bolts with some additional rebars in the footing. Then use a proper size post bracket to anchort the posts the the concrete using the cast in anchors. The cabana people should have typical detail drawings and recommendations for this proceedure.

Here are a couple of references for anchor brackets used to bolt wood posts to concrete:

Regards,

John

[donald girod]

You should not imbed wood posts (pressure treated or not) in concrete. Before the posts rot, they will expand and crack the concrete. And then they will rot. Wood posts should be above (not in) concrete.

[JTM]

Your point? I repeat:

The cabana people. . . Then use a proper sized

"post bracket". . .

----------------

to anchort the posts the the concrete using the cast in anchors. The cabana people should have typical detail drawings and recommendations for this proceedure.

Here are a couple of references for anchor brackets used to bolt wood posts to concrete:

Regards,

John

[JTM]

Your point? I repeat:

The cabana people. . . Then use a proper sized

"post bracket". . .

----------------

to anchort the posts the the concrete using the cast in anchors. The cabana people should have typical detail drawings and recommendations for this proceedure.

Here are a couple of references for anchor brackets used to bolt wood posts to concrete:

Regards,

John

[Robert]

Thank you very much for your answers! I'll ask the pool company to provide solid footing (18" thick concrete) where the posts will be, and then I will let the cabana people anchor on top. Again, THANK YOU!