Might also want to consider a j-bolt and 4x6 bracket instead if putting the wood in the concrete, if its that wet.
Really? You don’t know how siding works or attached and you’re an expert on this? Wow
No worries, he missed the corner post part I think....and maybe everything else...
This should be a good thread, the engineering requirements for building a chicken run should be spot on with the aptitude available here....