Forklifts are found in use in a variety of industries. They are particularly popular with the approximately 750,000 construction businesses in the US. They also see a great deal of use in warehouses, shipping, manufacturing, and even retail.
Of course, like most pieces of equipment that businesses use to lift heavy loads, there is a lot of opportunity for damage. Given that forklifts can cost tens of thousands of dollars, you want the maximum working life you can get from them.