5.6 Subframe, assembly frame
Subframe
The subframe must be designed according to the load and be self-supporting.
The preferred material is steel. If alternative materials are used, the strength of the subframe must be maintained.
Cross members must be provided at least in the front and rear areas to ensure the structure is torsionally rigid.
It is required for custom bodies, on which loads are focused on specific areas of the chassis, e.g. tippers and fifth wheel tractor units.
The subframe serves as a means of distributing the loads, focused in isolated areas, equally across the vehicle frame. To do this, it should be positioned above the longitudinal members, lead up to the cab and taper out in the front end area.
The various gaps between chassis and subframe should not be filled. Selfsupporting custom bodies can be secured above the platform frame directly on the standard consoles fitted to the frame.
Subframe and self-supporting custom bodies should be secured to the chassis at all available console points.
Bolts with strength class 10.9 shall be used for securing.
The position of the mounting points on the frame is shown in the dimension drawing in chap. 2.4.
