Can a standard office bookcase work in a mail room or supply closet?

For light-duty mailroom use — sorting trays, supplies, packaging materials — a commercial laminate bookcase works fine. For heavy-duty mailroom use with reams of paper, heavy boxes, or industrial supplies, you'll want heavy-gauge metal shelving rated for 200+ lbs per shelf. Standard commercial laminate bookcases are typically rated for 50–75 lbs per adjustable shelf. If you're stacking heavy items, invest in metal open shelving rated for the load. FindOfficeFurniture.com carries both standard and heavy-duty shelving — call 888-719-4960 for the right recommendation and the best deals.