EXTRA HEAVY DUTY SHELVES RUGGED, RELIABLE STEEL SHELVING FEATURES 1/2″ THICK WHITE MELAMINE AND PARTICLEBOARD SHELF DECKING FOR A STRONG, SMOOTH AND EASY-MAINTENANCE SURFACE. SHELVES ADJUST AT 1-1/2″ INCREMENTS. FAST, TOOL FREE ASSEMBLY. LONG LASTING BAKED ENAMEL FINISH. HEAVY DUTY SHELVING HAS UP TO A 300 LB. CAPACITY PER SHELF AND INCLUDES SINGLE RIVETED CROSSBEAMS, PLUS FRONT-TO-BACK BEAMS ON ALL LEVELS TO SUPPORT SHELF DECKING. CAPACITIES BASED ON EVENLY DISTRIBUTED LOADS.