As the very name implies freight elevators are used to carry the carry heavy leads upper floors. Freight elevators are larger than passenger elevators since they are meant to carry larger weights than passenger elevators. These elevators are used in warehouses, buildings that are under construction, multi storied shopping centers and various other structures where heavy loads are to be carried to upper floors. The dimension and design of an elevator depends on the purpose it is meant for.
Types of Elevators Freight elevators are of two types, hydraulic or traction. Traction lifts are fitted with a motor which is electrically powered which pulls a strong steel cable placed in a grooved pulley whereas hydraulic lifts have a piston which pushes the lift upwards. Either of these types requires a counterweight in the form of another weight at the other end of the rope. Most of them have two doors that are manually operated and then inside of them I such are finished with strong materials which can withstand wear and tear. In some cases the vehicles in which the goods are transported are loaded directly into the elevators, there are lifts which are specially designed for this purpose.
Dumbwaiters Smaller types of lifts called dumbwaiters are commonly used in supermarkets, restaurants, hospitals and libraries for carrying smaller loads. Such lifts are used in hotels to carry laundry, dishes and sometimes also for bigger items like tables etc., from one floor to the other. Some multi storied apartments also have small lifts for exclusively carrying laundry and other household items. Hospitals make use of such lifts for carrying their equipment; they are also used in supermarkets for carrying goods from the storerooms to upper floors.
Different Classes of Elevators Depending on the purpose they are meant, for they are categorized into different classes. Class A elevators are used for general freight loading in which the weight of the load is evenly distributed; the weight of any single piece is not more than ¼ of the elevators capacity. Class B elevators are used for carrying automobile trucks or passenger vehicles. Class C1 elevators are meant for carrying loaded four wheeled trucks which are rolled onto the platform as a single unit, the combined weight of the truck with the load should not exceed the rated capacity of the elevator. Elevators that are classified as Class C2 are for industrial truck loading, a maximum of up to 150% of the rated capacity can be loaded on the platform while unloading and loading. Elevators that are used for various other forms of industrial truck loading come under the Class C3 category. Care must be taken to see that the rated capacity of the elevators must not exceed during the unloading or loading process.
Other Uses for Elevators Many new apartments which do not have ramps have car lifts or vehicle elevators, the cars can be placed in the elevator and lifted up to the parking space, in some models the platform can also rotate so that the driver can drive forward. Many car workshops as well as manufacturers who have limited floor space use elevators to carry vehicles to upper floors where they can be stored or serviced.
Choosing Freight Elevators You need to make sure of your requirement you opt for a freight elevator. As said earlier, different ones are apt for different kinds of loads and this is one of the most important factors in making a choice of a freight elevator. Once you are sure of the work of the elevator required, you can start looking for well reputed and experienced companies manufacturing these. You can ask around and compare two or more manufacturers before you settle for a specific one. Besides the quality, you need to also compare the different prices offered.