We just had our front deck replaced. Like the others, it’s constructed entirely of pressure treated lumber. There has arisen some controversy about the tops of the railings, 2X6 boards – should they be sanded to eliminate any splinters and rough spots? Would you assume that they would of course be sanded? Or would you say you’ve never heard of such a thing? Or somewhere in between?
Sanding PT wood produces toxic dust, so wear appropriate breathing protection if you do choose to do so. Are you planning to paint it? If you’re just going to leave it bare, it may look crappy after sanding.
I’d use TREX for railings/anything your bare hands or ass are gonna touch.
Slight Hijack: Any PT lumber I’ve ever dealt with has warped like a dog’s hind leg. I got a Brand-New one outside right now that was going to be used in a landscaping project, and after a week it is twisted like a pretzel. Unusable.