Roof beam M8 load capacity

[krisonthemove]

Just finishing up a camper conversion. Got a webasto heater and Victron system neatly installed in the foot wells, bed next. I was thinking to have a bed supported on a box in the rear of the B9, and instead of legs, hang the front of it from the two M8 mounting points in the ceiling above the driver seats (that are there to support cargo divider, I assume).

I cannot find info anywhere on how much vertical loading each of these mounting points can take. Glad if you can point me to official number, or if not, perhaps some anecdotal info from trying to hang something heavy in them yourself, or estimate (preferrably backed by some motivation).

...and let me know if its not possible to understand what I mean, in which case I can take some photos. Will make sure to create a thread and post some photos of the build too once finished. Pretty happy with the heater end elctrical system integration