On Wed, 6 Jan 2021 20:45:44 -0500, Ed Pawlowski wrote:

On 1/6/2021 7:31 PM, Ethan Brown wrote:
Hi Ed, sorry I am really new to this type of thing. What do you mean by
a synthetic 2 x 4? Thanks for the thought on the gunk building up
underneath, something I hadnt considered. I am just trying to
understand how to keep the wood off the concrete slab and what approach
would be best? Cheers


Right, synthetic
https://www.markstaar.com/2-x-4-x-8-...mber-2496.html

Even pressure treated on concrete will deteriorate over time.
Depending on cost and height needed you could double up on Trex.


You can get 1 1/2" trex at a real lumber yard.