What is the structural roof beam located between the front windshield and the rear windshield called?

The structural roof beam located between the front windshield and the rear windshield is referred to as the vehicle header. This component plays a crucial role in the overall rigidity and strength of the vehicle's structure, helping to support the roof and providing protection in the event of a rollover. The vehicle header connects the A-pillars (which are located at the front of the vehicle) to the rear structural components, thus forming an essential part of the vehicle’s safety architecture.

The term "vehicle header" also indicates its position and function within the vehicle design, making it distinct from other roof components. The correct identification of this part is vital for understanding vehicle construction and safety features, as it contributes to both structural integrity and crash protection.

Other terms like "roof panel," "header rail," and "crossbar" refer to different components or functions within the vehicle's structure and do not accurately describe the specific part in question. For example, the roof panel typically refers to the outer covering of the roof, while the term "header rail" can sometimes be used interchangeably but is not as specific, and a "crossbar" often denotes a support member that spans across a structure rather than one that is longitudinally between the windshields.