Integral Frame:

• In this type of construction, there is no frame. It is also called unitized frame-body construction.
• All the assembly units are attached to the body and all the functions of the frame carried out by the body itself.
• Here the body shell and underbody are welded into single unit. The underbody is made of floor plates and channel and box sections welded into single unit. This assembly replaces the frame.
• This frame is used now a days in most of the cars. Due to elimination of long frame it is cheaper and due to less weight most economical also.
• Only disadvantage is repairing is difficult.

Semi – Integral Frame:

• In some vehicles half frame is fixed in the front end on which engine gear box and front suspension is mounted.
• In this case the rubber mountings used in conventional frame between frame and suspension are replaced by more stiff mountings.
• Because of this some of the vehicle load is shared by the frame also. This type of frame is heavier in construction.
• It has the advantage when the vehicle is met with accident the front frame can be taken easily to replace the damaged chassis frame.
• This type of frame is used in some of the European and American cars.