Using your Groves Stacking Racks is simple. First, if you're using multiple racks, stack them up to three units high with the bottom one stationary. When loading or unloading, remove the front legs for easy access. Place your stone slabs inside the rack and use the hold - down bars to secure them, which helps prevent damage during transport. If you've got the optional caster kit, install it on a single rack and use it as a jobsite cart to move materials around easily. Just make sure to lock the swivel - brake casters when you need the cart to stay in place. As for maintenance, regularly check the powder - coated finish for any signs of wear. Also, inspect the rubber on the base and uprights to ensure it's still protecting the material. If any part of the rack gets damaged, replace it promptly to keep your rack working well.