[new but handy]

Originally Posted by Fishward

You should switch the chart to only allow for deflection of L/720. rigidity is important for loaded glass boxes... that will give you a different span

"250lbs/foot is the required strength for loaded bus or all truck parking over living spaces" - my point exactly.. he's got loading of over 400lbs/ft. would you park a fully loaded bus or truck on 2 2x10s?

Not a bus but I would have no problems driving my 6000# truck across 2 6' 2x10's. I put 2 2500# lifts of lumber on 10' spans all the time.