Grim Reaper
Expedition Leader
The bed tray in my company truck is made out of Garage door track and rollers. Its rated 600lb.
I love "trailer surfing" on my utility trailer while unloading it... :Wow1:
My thinking is that most drawer systems give up a lot of volume to the rolling mechanism(s). That volume is lost, so minimizing it increases the drawer's volume without increasing the volume of the assembly. I used the roller that I previously mentioned in the design, but there may be a better option. The garage door rollers are attractively priced, but are much bigger in diameter.
This design uses 6 of the rollers. The upper pair and their slots are strategically placed to both carry the load of a partially opened drawer and to limit the travel of the drawer in both directions.
The frame is 3/4" square tube x .120 wall with threaded bushings welded in place for the rollers to thread into. The drawer is 1/2" thick Birch 7 ply plywood. For heavy use a steel wear plate may need to be inserted into the top and bottom of the slots. I'd try it without first and see what the drawer life is.