Document ID: chunk:federal_register_of_legislation:F2012C00535:front:0:p19
Version: federal_register_of_legislation:F2012C00535
Segment Type: other
Provision Reference: 
Character Range: 53450–56417

between the footprints of the wheels of the first and second axles
       L1  =   the distance from centre of wheel's first and second axles

       2.6.5. The unladen kerb mass of the vehicle shall be checked as follows:

Ftotal = F1+F2+F3+F4  Ptotal  Mk

where:

F1  =  reaction load on the load cell under the left hand wheel of the first axle
F2  =  reaction load on the load cell under the right hand wheel of the first axle
F3  =  reaction load on the load cell under the left hand wheel of the second axle
F4  =  reaction load on the load cell under the right hand wheel of the second axle

       If this equation is not fulfilled the measurement shall be repeated and/or the manufacturer shall be asked to modify the value of the unladen kerb mass in the technical description of the vehicle.

2.6.6. The height (ho) of the vehicle centre of gravity is given by:

where:
r  =  height of wheel centre (on first axle) above the load cell top surface

       2.6.7.                    If the articulated vehicle is tested in separate sections, the centre of gravity position shall be established separately for each section.

Figure A3.3 - Determination of height of centre of gravity

Annex 4

VIEWPOINTS ON THE STRUCTURAL DESCRIPTION OF THE SUPERSTRUCTURE

       1. General principles

       1.1. The manufacturer shall define unambiguously the superstructure of the bodywork (see figure A4.1, for example) and shall state:

       1.1.1. which bays contribute to the strength and energy absorption of the superstructure;

       1.1.2. which connecting elements between the bays contribute to the torsional stiffness of the superstructure;

       1.1.3. the mass distribution among the nominated bays;

       1.1.4. which elements of the superstructure are assumed as rigid parts.

    Figure A4. 1 - Derivation of the superstructure from the bodywork

       1.2. The manufacturer shall supply the following information about the elements of the superstructure:

       1.2.1. drawings, with all the significant geometrical measurements necessary to produce the elements and to evaluate any change or alteration of the element;

       1.2.2. the material of the elements referred to national, or international standards;

       1.2.3. the joint technology between the structural elements (riveted, bolted, glued, welded, type of welding, etc.).

       1.3.              Every superstructure shall have at least two bays:  one in front of the centre of gravity and one behind the centre of gravity.

       1.4.              No information is required about any elements of the bodywork, which are not parts of the superstructure.

       2.              Bays

       2.1.              A bay is defined as a structural section of the superstructure forming a closed loop between two planes which are perpendicular to the vertical longitudinal centre plane (VLCP) of the vehicle.  A bay contains one window (or door) pillar on each side of