Heavy Duty Racking Unit 4 Tier Warehouse Shelving Melamine Shelves 500kg. Robust, Rigid and Reliable; our most popular commercially used Heavy Duty Racking is the answer to your business needs. Thanks to the industrial-grade steel frame, these units are perfect for intensive use and larger-sized loads. Safely hold up to a staggering 500kg per shelf. Supplied with a Melamine Shelf, suitable for use in storage areas where products need to be kept free from dust.The double-sided storage unit ensures easy access to stored goods from both sides of the racking. No cross-bracing means goods can be removed from either side of the shelves.