49 CFR Part 238
§ 238.233 — Interior fittings and surfaces
FRA Part 238 · Subpart C — Specific Requirements for Tier I Passenger Equipment. Full current text with cross-references on BuildSpec.
§ 238.233 Interior fittings and surfaces. (a) Each seat in a passenger car shall— (1) Be securely fastened to the car body so as to withstand an individually applied acceleration of 4g acting in the lateral direction and 4g acting in the upward vertical direction on the deadweight of the seat or seats, if held in tandem; and (2) Have an attachment to the car body of an ultimate strength capable of resisting simultaneously: (i) The longitudinal inertial force of 8g acting on the mass of the seat; and (ii) The load associated with the impact into the seatback of an unrestrained 95th-percentile…
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