Yeah I know! Pieces of string are never the same length and it's a bugger trying to label them.
I'm 5'6" and it's a lot taller than me when it opens.
Okay, so let's go back to the photo and try to figure this out, because now you've got me wondering.
The hard floor pivots in an arc from the lowest point at the rear. The hard floor is 2.2m. The pivot point is .55m below that (the total of the hard floor and the rack). From the ground (if it's level) to the pivot point, should be .55m. The rack swings over first and last, and pivots from the rear of the hard floor and it's roughly 2.2m (it's a smidge shorter than the floor). Add them all together and that's your height for opening (give or take a bit for tyre pressures and some dodgy mathematics).
So 3.3m all up but 3.5m should see you miss everything it can hit. Does that sound about right?
Kit_e