ECE R14 is the most important regulation to provide for passenger safety. This regulation must be
passed to ensure a correct functionality and sufficient strength of all anchorage points of the seat and
seatbelts [47]. Depending on the location on the vehicle, some seats have a three-point seatbelt and
some have a two-point seatbelt. To guarantee the seatbelt system and anchorages, they must resist
defined static test loads. These high forces are applied to the seatbelts over loading devices with the
help of body blocks. After the test, the seatbelt and anchorages are expected to retain their integrity.
In addition, when the forces are applied to the top of the seat, longitudinal displacement must not
exceed the allowed scale. The forces applied to the seatbelt are determined by the vehicle class (M2 or
M3 class) and seatbelt point number. The forces that must be applied according to the vehicle class and
seatbelt point number are given Table 1. In this study, ECE R14 regulation is considered because this
regulation has the most critical effect on the passenger seats and restrains in the verification phase.