When I built benchwork for Joe Genovario back in '09 he requested a raised portion in his benchwork to allow for a roll out 2' X 6' work bench. This saved considerable floor space in his limited area.
I started with a 3/4" X 8" X 8' piece of Maple plywood and shaped it accordingly.
Then I made a rollout work bench with four fixed rollers which provided stable back and forth movement.
Joe had drawer units immediately beside and behind him also under the layout for his supplies and tools. Excellent work provision, zero floor space impact.
For the deck I made a thin honeycomb waffle bottom for a rigid platform. This configuration served Joe very well.