I'm looking to build this toolbox using 2x4s, 3/4" plywood sheets, and a 1/4" steel plate, all for the main body. The drawers will be made from 1/2" plywood, and will be mounted on 100 pound rated drawer slides. The larger drawers on the bottom will use 2 sets of slides per each drawer if necessary. The steel plate at the base will sit 6" above the ground on caster wheels. I work as an auto technician for reference. The box is 96" wide, 30" deep, and 76.25" tall.

Does my design look to be strong enough?