No, you are correct. 7.5 inches is greater than 6.

steve

You still can't load the bottom chord of a truss however. Are they trusses,
or conventional rafters and ceiling joists with support poles?



"jtpr" wrote in message
...


I'm missing the math, but this is a garage with 2x8 rafters spanning
19'. I will be putting R30 (9.5") up there and if I do put some
plywood on top for a little storage it will compress it to 7.5". So
it sounds like even with the compression I'm better off then the
alternative of R19.

Am I off base?

-Jim