Replacing steel with wood

[Perpendicular]

I searched but I didn't find what I wanted so thought I would ask the consensus.

I want to replace my metal floor bed with wood. Not put one on top or buy a new bed, just take out what is there and pout wood in it's place. I like the overlay ones kinda and that may be my only options but figured someone has done this before, no?

Can that be done without destroying the rest of the bed or am I crazy to want to?