I want to mate two 2x6s pressure-treated boards (span = 8') so that I can use them as a beam for my ground-level floating deck.
Should I use a construction adhesive? Anything special given that the boards are pressure treated?
What is the recommended spacing between screws? how many screws at each mark?
Screw length?
TIA
[Edit] For clarification, by mating I mean side-by-side e.g. two 2x6s become a single 4x6.