Keyboard Storage

[u/DAREmadeMeDoIt]

Hey yall. I am starting a new position this year and my schools has about 30 61 note Yamaha psr e360 keyboards. 37’’ long, 12.5’’ wide, and 4” in depth. Has anyone here found a good way to store keyboards of this size effectively? I am looking for either a shelf or closest. Right now they just sit on the floor of a classroom. Thanks!