I am trying to build a platform on my boatlift in South Florida.
The platform will be submerged in salt water periodically.
The dimension of the platform will be 16' X 42".
It will be placed on the Aluminum beams of a boat lift.
I will be using pressure treated wood.
Possibly 3 peope will be on the platform at one time.
What is the wood dimension I need?
Will 2X6's on edge 3' apart be OK for the 9' span.
Will 1X4" flat with a 3" overhang for the 40" span.
Do I need to go to 2 X 8 or 2 X 10 and/or will 3 cross members be better.
Should I go to 2X6 for the the 40" span.