BUILDING & MOUNTING THE STRUCTURES 3-37 E UROCARGO Euro 4/5 Should a reduction in the height of the subframe section be required, using shear-resistant connections between the chassis frame and subframe, in place of the channel section it is possible to use structural elements with combined sections, as indicated in Table 3.11, provided the width of the flange and the thickness are not less than the corresponding values for the structural element indicated in Table 3.12. These conditions of a general nature apply to the stated materials.
The possibility of using materials with superior mechanical characteristics requires verifying the total moment of resistance of the chassis frame plus subframe. Since reduc- ing the height of the structural element of the subframe also decreases the resistance to torsion, in the case of a crane with four stabilizers, the bodybuilder must take special precautions to create suitable torsional rigidity of the subframe in the crane support zone. For this reason it is recommended not to use structural elements of height under 120 mm.
Figure 3.25 91537 1 Subframe 2 Plates 3 Brackets 4 Crane connections 5 Stabilisers 6 Connecting angle piece Table 3.12 - Crane on the rear overhang, solutions with reinforcement structural elements with combined sections (see Figure 3.25) B C D Maximum reduction in the height of the section (mm) 20 60 120 Example of combined sections as an alternative to a channel section 250x80x8 (mm) 200x80x8 160x80x8+ angle piece 140x80x8+ angle piece 3.7.3 Removable cranes The installation of removable cranes on the rear overhang may be carried out according to thespecifications ofthe precedingparagraph provided the type of fixing used between the crane and the subframe does not cause additional stress to the vehicle’s chassis.
In consideration that the vehicle may be used with or without the crane, we recommend marking on the body the position of the useful load consistent for the two types of operating condition. If the vehicle retains its ability to tow a trailer, all regulation concerning the proper coupling of the vehicle must be observed. Installing a crane Print 603.93.431 Base - January 2008 R (N/mm2) 0,2 320 360 360 L (see Figure 3.25) V - 0.60 L G 0.65 L G Actual reduction in height (mm) 12 52 64