Body in White (BIW) is a quite frequently used term in the construction of a vehicle.
What parts are covered in the body-in-white area of a car?
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The term body in white (BIW) represent the main structure of a vehicle, excluding other vital components such as engine, seats, transmission and steering.
Some experts also exclude closures (doors, bonnet, boot lid, etc.) in the body in white (BIW).
The BIW defined the size, design and strength of a vehicle. The structure is made from steel sheet pressings welded together by robots. Both hot rolled steel (HRC) and cold-rolled steel (CRC) are used in making body in white (BIW). However, most of the steel used in the fabrication of BIW is galvanised (coated).
Generally, the body in white (BIW) without closures, accounts for nearly 20% of final vehicle weight.
Body in white consist of two segments exposed parts and interior components.
The interior components include parts side member front, middle, rear, crash box, bumper, A, B and C pillar, seat structure, cross member, tunnel, roof frame, roof bows, rocker panels, door impact beams etc.
The exposed components of BIW include mudguards, hoods, door panels etc.