I purchased 3 of these shelving units for my garage that was in serious need of organization. It took approximately 30 mins to build each unit. The strength of these units is truly amazing. My family members had purchased a different brand that cost a lot more than these and they don't even come close to the integrity of the Gladiator Shelves. Not only are the structurally sound but they look outstanding. You will definitely not be disappointed with purchasing these.