On Sep 18, 7:58*am, "JohnnyC" wrote:
Due to the height of a shed floor and the slope of the yard, I need to make
a ramp that is about 6 to 7ft long. *The ramp needs to support up to 700lbs.

If I put the joists of the ramp 12" on center, can I use 2x6 PT lumber or do
I need something more substantial like a 2x8"? * Also, should put some kind
of support in the middle of the ramp?

Thank you for your time.

So you will bury the joists as the ramp hits ground? 700 lb, a
tractor? Weight is spread out at 4 points 2x4 should work and be
easier to do and bury, even consider a few angle irons.