Document ID: chunk:federal_register_of_legislation:F2015L02109:body:0:p18
Version: federal_register_of_legislation:F2015L02109
Segment Type: other
Provision Reference: 
Character Range: 54173–57201

centre of the steering wheel hub.  For other seats, the centre plane of the occupant is specified by the manufacturer.
2.3.                              "Design rib angle" means the nominal (theoretical) angle of the WorldSID 50th percentile adult male middle thorax, lower thorax and abdominal ribs relative to a level surface or horizontal reference plane, as defined by the manufacturer for the final adjustment position of the seat in which the dummy is to be installed.  The design rib angle corresponds theoretically to the design torso angle minus 25°.
2.4.                              "Design torso angle" means the angle measured between a vertical line through the manikin H-point and the torso line in a position which corresponds to the nominal design position of the seat back for a 50th percentile adult male occupant established by the vehicle manufacturer.
2.5.                              "Dummy H-point" means the coordinate point midway between the H-point locator assembly measurement points on each side of the test dummy pelvis. [10]
2.6.                              "Dummy rib angle" means the angle of the test dummy middle thorax, lower thorax and abdominal ribs relative to a level surface or horizontal reference plane as established by the thorax tilt sensor angle reading about the sensor y‑axis. The dummy rib angle corresponds theoretically to the actual torso angle minus 25°.
2.7.                              "Fiducial marks" are physical points (holes, surfaces, marks or indentations) on the vehicle body.
2.8.                              "Leg (for dummy installation purposes)" refers to the lower part of the entire leg assembly between, and including, the foot and the knee assembly.
2.9.                              "Manikin H-point" means the pivot centre of the torso and thigh of the 3‑D H machine when installed in a vehicle seat in accordance with paragraph 6. of this annex. The manikin H-point is located at the centre of the centreline of the device, between the H-point sight buttons on either side of the 3‑D H machine.  Once determined in accordance with the procedure described in paragraph 6. of this annex, the manikin H-point is considered fixed in relation to the seat cushion support structure and is considered to move with it when the seat is adjusted.
2.10.                          "Mid-sagittal plane" means the median plane of the test dummy; located midway between and parallel to the dummy spine box side plates.
2.11.                          "Muslin cotton" means a plain cotton fabric having 18.9 threads per cm2 and weighing 0.228 kg/m2 or knitted or non-woven fabric having comparable characteristics.
2.12.                          "Seat cushion reference line" means a planar line along the side surface of the seat cushion base and passing through the SCRP defined in paragraph 2.14. of this annex. The seat cushion reference line may be marked on the side of a seat cushion support structure and/or its position defined using an additional reference