Good point...
There are a few largish packs that are not designed for weight but volume.
I could be wrong but I don't think that Golite has a frame and in my personal opinion past 25 lbs or so you need a frame .
I have a ULA AMP (frameless) that holds my fruit and veggies from the market, that is often up to 30lbs and it is OK for the 2 miles or so back home but I would not think of anything like that sort of weight in there for the trail.
Conversely my ULA Circuit does rather well up to 35 lbs , as it is rated on the ULA web site (from memory...)
Note that the max weight recommended for that Golite is 30 lbs.