BUILDING & MOUNTING THE STRUCTURES 3-31 E UROCARGO Euro 4/5 3.7.1 Crane behind the driver’s cab The mounting of the subframe onto the chassis will as a rule, be made using the standard brackets (see Figure 3.22) to which are added, if necessary, other flexible anchorages (brackets or clamps) so that the flexibility and torsional characteristics of the chassis remain unchanged. The dimensions and the subframe to be used for this type of installation are specified in Table 3.8. For on-road vehicles only if the height of the subframe runner profile has to be reduced (e.g.
to lower the total height of the vehicle) the mounting of the subframe may be carried out with shear resisting connections (see Figure 3.23). For these applications, the minimum dimensions of the reinforcing runner are specified in Table 3.7. In all case the maximun rear wheel travel / movement must be allowed. The use of runners with a constant cross-section is recommended over the entire useful length of the vehicle. Any possible gradual reduction of the cross-section of the runners is permissible in those areas in which the flexional moment induced by the crane as- sumes values that correspond for those of boxes marked ”A” in Table 3.12 and Table 3.13.
The subframe for the crane may be integrated with the body longitudinal runner as shown in Figure 3.22 Length ”Lv” must not be less than 35% of the wheelbase for vehicles with forward-control cab when the body runner has a smaller cross-section. Figure 3.22 1. Subframe - 2. Connections - 3. Crane joints - 4. Stabilisers Installing a crane Print 603.93.431 Base - January 2008