Got more details on your ‘deck’ construction on top of that framing? And what is your max shelf/deck depth??
Nice looking job,…
Thank you, here’s a picture that shows a little more. I screwed a 1" x 3" onto the supports, being careful to get the spacing right. I screwed and glued 1/2" plywood to the top of that. Last layer is 1" blue foam. You can see this a the right edge of this picture. 
The top facia is just some 1/8" thick underlayment(plywood) with 1"x2"'s for strength
The depth of the deck varies from 12" to 24",so far, along the 80 feet of mainline