It is referred to as a Bogie Hearth Furnace or car-bottom furnace. It is the preferred furnace type for the heat treatment of large or heavy parts. Generally, the base part is designed to be movable. Before the charge is loaded, the load is placed on the base with the help of a crane, and then the base is closed by entering the furnace on rails. The door mechanism of the Vizyon Heat brand oven shown in the attachment is designed as a guillotine door. It can also be designed with various types of resistance or for natural gas heating. It can be designed in different sizes and loading capacities according to need.