Document ID: chunk:federal_register_of_legislation:F2012C00535:front:0:p21
Version: federal_register_of_legislation:F2012C00535
Segment Type: other
Provision Reference: 
Character Range: 58814–61717

be included in the bay.

       2.4. The distance between two bays shall be defined as the distance between their CP's.

       2.5. The distance of a bay from the centre of gravity of the vehicle shall be defined as the perpendicular distance from its CP to the vehicle centre of gravity.

       3. Connecting structures between the bays

       3.1. the connecting structures between bays shall be clearly defined in the superstructure.  These structural elements fall into two distinct categories:

       3.1.1. The connecting structures which form part of the superstructure.  These elements shall be identified by the manufacturer, in this design submission: they include:

       3.1.1.1. side-wall structure, roof structure, floor structure, which connect several bays,

       3.1.1.2. structural elements which reinforce one or more bays; for example, boxes under seats, wheel arches, seat structures connecting side-wall to floor, kitchen, wardrobe and toilet structures.

       3.1.2. The additional elements which do not contribute to the structural strength of the vehicle but which may intrude into the residual space, for example: ventilation ducts, hand luggage boxes, heating ducts.

       4. Mass distribution

       4.1. The manufacturer shall clearly define the portion of the mass of the vehicle attributed to each of the bays of the superstructure.  This mass distribution shall express the energy absorbing capability and load bearing capacity of each bay. The following requirements shall be met when defining the distribution of mass:

       4.1.1. the sum of the masses attributed to each bay shall be related to the mass M of the complete vehicle:

       where:

       mj  =  the mass attributed  to the jth bay
       n    =  the number of bays in the superstructure
       M  =  Mk, unladen kerb mass; or,
             =  Mt, total effective vehicle mass, as appropriate

       4.1.2. the centre of gravity of the distributed masses shall be in the same position as the centre of gravity of the vehicle:

       where:

       lj  =  the distance of the jth bay from the centre of gravity of the vehicle
              (see paragraph 2.3.).
       lj  is positive, if the bay is in front of the centre of gravity and negative if it is
       behind it.

       4.2. The mass " mj" of each bay of the superstructure shall be defined by the manufacturer, as follows:

       4.2.1. the masses of the components of the "jth" bay shall be related to its  mass "mj" by:

where:
mjk  =  the mass of each component of the bay
s      =  the number of individual masses on the bay
       4.2.2. the centre of gravity of the component masses of a bay shall have the same transverse position inside the bay as the bay's centre of gravity (see figureA4.4):

           where:

           yk  =  the distance of the kth mass component of the bay from the axis "Z" (see figure