DAILY 4x4 ‒ GUIDELINES FOR BODYBUILDERS
APPLICATIONS OF SUPERSTRUCTURES
3.2 ELEMENTS MAKING UP THE SUBFRAME
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– Printed 692.68.999 – 3 Ed. - Base 08-2020
can be used, but with moments of inertia and resistance which are the same or higher. These values can be obtained from the
technical documentation of the profile manufacturers.
3.2.2 Cross member
A sufficient number of crossbars, possibly to be placed in correspondence with the fastening clamps to the chassis, must brace the
two sections of the subframe.
The crossbars may be open section (e.g. C), or closed section where you would want to impart greater stiffness.
In their connection, suitable gusset plates as in the figure must be used to give adequate resistance to the connection (see the fol-
lowing Figure on the left). When you want to achieve greater stiffness in the connection, it can be carried out according to the fol-
lowing Figure on the right.
193868
Figure 4
3.2.3 Stiffening of the subframe
For some superstructures (e.g. tipping bodies and cranes on rear overhang, superstructures with high centre of gravity), the sub-
frame must be stiffened in the rear part.
This can be achieved by increasing the scope of stiffness to obtain:
● boxing the longitudinal sections in the rear area (ref. A in Figure 5);
● adopting closed section cross members (ref. B in Figure 5);
● applying cross diagonals (see Figure 6);
In general the use of boxed longitudinal sections should be avoided in the front part of the subframe.
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