"Backlash" wrote in message
...
I floored the entire 50' length using 1/2" plywood, and stored everything
from books to domestic items to auto parts up there for 23 years. No snow
load to talk about here, though, I'm in the South. It is always best to
be safe, but my experiences have shown properly installed truss roof
systems to be very strong. This is presented only as a real world
experience. Use your own judgement.

What is not known is the design of the system. Yours may have been designed
to take a fairly large load. Others may not. If you know the design
capability, no problem.