Freestanding Wood Column Foundation

[reverbz]

Hey Guys,

When you have a freestanding wood post or a freestanding wood framed out stud column, do you have your pedestal above the ground some distance? How much and why? Is it just to help prevent moisture damage?

Thank you!

 

[driftLimiter]

I'm looking at IBC '18 Sections 2304.12.1.1 through 2304.12.2.2.

The code requires 'durable or preservative treated wood' in a whole variety of situations when the wood is too close to exposed earth.

So the section of posts or columns... For example 2304.12.2.2 :
All posts supported by concrete which is in contact with earth shall be durable or preservative treated lumber.
Except:
1. Posts not directly exposed to weather.
2. Supported 1" above and moisture isolated from the finish.
3. Are not less than 8" above exposed earth.
All of Items 1 through 3 of the exception must be true or the column needs to be durable/PT.