Where is the longitudinal beam located?

[McGiselle]

Longitudinal beams are divided into front longitudinal beams and rear longitudinal beams. The front longitudinal beam is located below the front engine compartment of the car, while the rear longitudinal beam is situated beneath the trunk. Here are some relevant details: 1. Frame: The frame is the most important load-bearing component in a car, and the longitudinal beam is one of its key parts. Therefore, the longitudinal beam plays a crucial role in bearing loads. Various types of frames, such as side rail frames and central backbone frames, all include longitudinal beams. Longitudinal beams are typically made by stamping low-alloy steel plates, with cross-sectional shapes usually being channel-shaped, though some are designed as Z-shaped or box-shaped sections. 2. Longitudinal Beam: Depending on the vehicle type and structural layout requirements, longitudinal beams can be curved in the horizontal or longitudinal plane and can have uniform or non-uniform cross-sections. The advantage of a Z-shaped longitudinal beam is that it allows the frame to maintain equal width at the front and rear, ensuring sufficient space in the front part of the frame to accommodate the diesel engine flywheel housing and the starter mounted on it. However, its drawback is that when connecting the longitudinal beam to the cross beam, an additional shim plate is required on the upper flange of the longitudinal beam, making it less convenient to install related assemblies on the web of the beam.