•  The forces which are induced punctiformly are to be distributed uniformly via a subframe over the entire chassis frame.
• For this purpose, the subframe should lie without torsions over the side rails and should be guided up to the cab (procedures according to item 3.3).
• At a chassis with double cab it may be necessary to shorten the rear chassis overhang. This measure is to be controlled on the basis of axle-load calculations.
• High centres of mass for attachments and net-loads impair the driving and braking behaviour. The chassis can be provided ex-works with stabilizer bars/attenuation.
• Due to the width and length of the attachment, it may be necessary to modify lighting, markings and exterior mirror. These modifications are listed under items 3.12 - 3.15.
• The necessary underrun protection and lateral protection is described in items 3.18 and 3.19.

Moments of resistance of the subframe side rails for flatbed attachments:

Profile dimensions see diagram, item 3.3. The specified values refer to normal operating conditions and applications without overhang extension.