49 CFR Part 238
§ 238.435 — Interior fittings and surfaces
FRA Part 238 · Subpart E — Specific Requirements for Tier II Passenger Equipment. Full current text with cross-references on BuildSpec.
§ 238.435 Interior fittings and surfaces. (a) Each seat back and seat attachment in a passenger car shall be designed to withstand, with deflection but without total failure, the load associated with the impact into the seat back of an unrestrained 95th-percentile adult male initially seated behind the seat back, when the floor to which the seat is attached decelerates with a triangular crash pulse having a peak of 8g and a duration of 250 milliseconds. (b) Each seat back in a passenger car shall include shock-absorbent material to cushion the impact of occupants with the seat ahead of them.…
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