Iveco EUROCARGO, Instructions Manual

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EUROCARGO Euro 6
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APPLICATIONS OF SUPERSTRUCTURES
APPLICATIONS OF SUPERSTRUCTURES
3.2 ELEMENTS MAKING UP THE COUNTER CHASSIS
9
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Printed 603.95.747
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1st Ed. - Base 12/2013
It is necessary to create continuity of support between the profiles of the counter chassis and those of the chassis; if this is not ob-
tained, the continuity can be restored by means of interposition of strips of sheet metal or light alloy.
If there is to be a rubber undercrawl element we recommend characteristics and thicknesses similar to those used for normal
production (hardness 80 Shore, max thickness 3 mm). Its use can prevent abrasive actions that can cause corrosion in the joining
between materials of different composition (e.g. aluminium and steel).
The dimensioning prescribed for the side members of the various types of superstructure is the recommended minimum value
and, as a rule, is valid for vehicles with wheelbases and rear overhangs provided as standard (see Tables from 3.4 to 3.6 and from
3.8 to 3.13). In all cases similar profiles can be used, but with moments of inertia and resistance that are not lower. These values can
be obtained from the technical documentation of the profile manufacturers.
Cross members
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 counter chassis.
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 must be used to give adequate resistance to the connection (see the following Figure on
the left). When you want to achieve greater stiffness in the connection, it can be carried out according to the following Figure on
the right.
193868
Figure 4
Stiffening of the counter chassis
For some superstructures (e.g. tipping bodies, concrete mixers, cranes on rear overhang, superstructures with high centre of grav-
ity), the counter chassis should be stiff in the back.
This can be achieved by increasing the scope of stiffness to obtain:
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boxing the longitudinal sections in the rear area;
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adopting closed section crossbars (see Figure 3.5);
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applying cross diagonals (see Figure 3.6);
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applying a torsion-resistant longitudinal element (see Figure 3.7).
In general the use of boxed longitudinal sections should be avoided in the front part of the counter chassis.