There are a lot of different things that you can use Heavy Duty Shelf for, from storing things as fragile as glass products, to things as heavy duty as wood and metal beams. Choosing the right shelving for your needs is important and isn't always obvious. Some shelves look like they can handle more weight than they actually can so going by the look of the shelf is not always a good idea, especially if what you're storing is heavy and valuable.
When choosing your shelves there is usually some sort of an explanation near the rack your grabbing the unit/kit from that will tell you what the weight load distribution limits are. You should, of course, do your homework before shopping for heavy shelving. If your storing relatively light objects you may not necessarily need to pay more for heavy shelving, you may be OK with a cheaper but still sturdy alternative shelving.
Heavy Duty Shelf is often purchased for either heavier items, more wear and tear (moving things on and off the shelf frequently) or for commercial purposes that require you to try to hang on to your investment longer. Part of a store or shops bottom line is equipment purchasing and if you can purchase a shelf assembly once and never have to buy a replacement then this is considered a wise investment.
Keep in mind that although a shelf may be heavy duty this doesn't mean that climbing on it will not break it. Even if the shelf itself can withstand tremendous weight for storage, climbing on the side of it may actually offset the load distribution to the point that the shelf becomes weaker and breaks. You can also suffer a bad fall if the shelf doesn't have enough weight on it to balance out your weight and falls over on top of you!
There are shelving units for different uses as well, so be sure to talk to someone knowledgeable in the store you purchase them in, or consult your internet search engine for more advice on choosing a Heavy Duty Shelf that is best for you. You may spend more than you have to if you don't realize the weight requirements. There are actually several levels of heavy duty to choose from. Heavy duty simply means it's designed for more weight and will last longer due to what it's made from. Sometimes this means that it is well constructed and practically indestructible under normal use, i.e. it will outlast your needs!