I'm not disagreeing with anyone, just pointing out an experience. I just
sold a workshop, concrete block, 28 X 50, with a 4/12 pitch, 1/2" plywood
deck, asphalt shingle roof, span on 28' width. Trusses were 2 X 4 on 24"
centers, metal splice plates, with the "W" format, using hurricane clips on
top plate at attachment. The center chord exposed clear area was 8 feet wide
in the middle of the truss. 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. By the way, there was a 6" monorail I beam mounted under the ceiling
by bolting it up through the trusses every 2 feet, using a small timber
across the lower chords of the truses, and running 32 feet down the shop. It
was supported at both ends by pipe posts, and it was located 8 feet or so
out from the wall at the bottom of one of the V location of the trusses, and
was used to move equipment and pull auto engines and such. I KNOW that 1,000
pounds would sag the beam 1/16" by measuring before and after. My brother in
law has an identical workshop, except with 5/12 pitch, with the same setup.
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.

RJ

wrote in message
oups.com...
Spitzer has a point.
What occurs to me is the truss configuration cannot be changed on a
whim.
That probably doesn't leave much room for storage.
TB