Division 2.15

‘Frontal protection system leading edge reference line’ means the geometric trace of the points of contact between a straight edge 1 000 mm long and the front surface of the frontal protection system, when the straight edge, held parallel to the vertical longitudinal plane of the vehicle and inclined rearwards by 50° and with the lower end 600 mm above the ground, is traversed across and in contact with the frontal protection system leading edge. For frontal protection systems having a top surface inclined at essentially 50°, so that the straight edge makes a continuous contact or multiple contacts rather than a point contact, the reference line is determined with the straight edge inclined rearwards at an angle of 40°. For frontal protection systems of such shape that the bottom end of the straight edge makes first contact, then that contact is taken to be the frontal protection system leading edge reference line, at that lateral position. For frontal protection systems of such shape that the top end of the straight edge makes first contact, then the geometric trace of 1 000 mm wrap around distance will be used as the frontal protection system leading edge reference line at that lateral position. The top edge of the frontal protection system shall also be regarded as the frontal protection system leading edge for the purposes of this Regulation, if it is touched by the straight edge during this procedure (see Figure 5);