3-30 BUILDING & MOUNTING THE STRUCTURES E UROCARGO Euro 4/5 Installing a crane 3.7 Installing a crane The selection of the crane must be made with due consideration to its characteristics (weight, maximum torque) in relation to the performance of the vehicle. The positioning of the crane and of the payload must be done within the load limits permitted for the vehicle. Installation of the crane must be carried out in compliance with statutory requirements, national standards (e.g. CUNA, DIN) and international stan- dards (e.g. ISO, CEN), depending on which of these is pertinent to the particular vehicle.
While the crane is operating, the stabilisers (hydraulic if possible) must be used and be in contact with the ground. As a general rule, the installation of a crane requires the use of a suitable subframe, whose construction must taken into account all general specifica- tions relating to it (point 3.1). Concerning the dimensions of the runners for the subframe, refer to Table 3.8, 3.13 and 3.14.
In those cases where no specific subframe is called for (areas indicated with an ”A”) it is still necessary to provide a suitable mounting on the chassis for the crane using the standard body subframe (the length of the section members must be at least 2.5 times the width of the base structure of the crane) in order to distribute the load and the stress developed during the operation of the crane. If the vehicle requires the use of its own subframe, it may also be used for the crane provided that its dimensions are adequate. Special cases, whose M G max value fall within the areas designated with the letter ”E” (or for higher values) must be checked individ- ually each time.
Figure 3.21 M G max = (F · L + P · l ) max The dimensions of the subframe refer to the total maximum static moment of the crane (M G max ) which is calculated on the basis of the equation given in Figure 3.21. The decision concerning the number of stabilisers and the type of subframe to be used, particularly in terms of torsional rigidity (box- type sections, cross members etc.) is determined by the maximum moment of the crane and its position for which the Manufacturer of the crane and installer are responsible. The verification of the stability of the vehicle when the crane is operating must be done in compliance with the applicable government regulations.
Installing a crane Base - January 2008 Print 603.93.431