Anyone know how much stress those cargo area tie downs can handle?

Right now I have my Hi-Lift, axe and shovel held to the cargo area floor with a couple ratchet straps. I think the floor tie downs are fairly sturdy, but what about the "wall" ones? they'll hold a cargo net, but anything stronger? I was thinking of making some kind of mount for the wall for the Hi-Lift and axe and shovel. Maybe the Hi-Lift on one side and the others ont he other side so vision isn't impaired, like it is with the spare.

 

Not sure on the exact limitations of the tie downs but I have a box with 100 lbs of tools and misc equip in there at all times for over a year and have yet to have a problem.