I intend to build a wall mounted work surface that doubles as a shelter for the table saw. I have a Sawstop 52" ICS on mobile base - dimensions are 34.25" tall, 36" deep, 86" wide. When elevated to move the height of the extension table is 36" high.
My garage has foundation walls of poured concrete that extend 41.5" above the floor.
My intent is to build a torsion box 94.5" long and 36" deep with the bottom being 36.5" above the garage floor. That should give enough clearance to roll the saw in and out without much issue.
The torsion box I have drawn up would be made of 1/2" MDF.
The box would consist of 60 chambers each measuring 6-5/8" x 6-7/8".
I intend to add a replaceable hardboard top and solid wood front to the assembly.
The box would be fastened to the wall at one end and along its entire length, the open end would have a support of some sort and obviously have an open front.
What I have not determined is the required rib height to create reasonably stiff box.
I am 6'1" tall and have an actual woodworking bench inside the house. This surface would be for general garage type crap - sharpening lawn mower, fixing stuff, mounting a bench grinder, etc.
If I use 2" ribs the resulting bench height would be 39-1/2".
so the question is:
Are 2" ribs sufficient?
Should I add more ribs resulting in more chambers?
Any advice would be greatly appreciated.