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Requirements for Roof Hatches and Consequences

Specific Issues for M2-Buses of Class B with Transition from 05-series of UN Regulation No. 107 to 06-series of amendments. Requirements for Roof Hatches and Consequences.

Samuel
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Requirements for Roof Hatches and Consequences

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  1. Specific Issues for M2-Buses of Class B with Transition from 05-series of UN Regulation No. 107to 06-series of amendments

  2. Requirements for Roof Hatches and Consequences • ECE-107.05For size and siting of exits vehicles of classes A and B could alternatively refer to Annex 7. Annex 7 para. 1.2 did not restrict the exact position of escape hatches. • ECE-107.06 • Siting of exits is described in Annex 3 for all vehicle classes. • Annex 3: • 7.6.2.8. Required escape hatches shall be positioned as follows: (a) If there is only one hatch, it shall be situated in the middle third of the passenger compartment; or …

  3. Issues with 06-series regarding escape hatch positions • Longitudinal extension of “passenger compartment” not defined in UN R107, hence not unambiguous where middle third exactly is: • Is measurement from rear of driver’s compartment to end of seating space or to end of cabin? • Especially on a short vehicle, with the length of the passenger compartment measuring ~2.5m, the exact location of the escape hatch is not relevant. • The regulatory restriction causes the roof hatch to be located overlapping with the service door. This is not seen as an advantage for evacuation routes, causes issues with roll over strength (UN R66).

  4. Roof Hatch Position Examples – Passenger Compartment = Front seat to rear seat “Same” positions, but now allowed. Centre 1/3 Not allowed Centre 1/3  X Centre 1/3 X3370 X4730 X6090 X7450 X3370 X4200 X5042 X5880  Cabin Size 1 (12-seater) Cabin Size 3 (18-seater) X3370 X4465 X5560 X6655 Cabin Size 2 (15-seater)

  5. Roof Hatch Position Examples – Passenger Compartment = Front seat to rear door “Same” positions, but now allowed. Centre 1/3 Not allowed Centre 1/3  X Centre 1/3 X4740 X3370 X6110 X7480 X5332 X4351 X6313 X3370  Cabin Size 1 (12-seater) Cabin Size 3 (18-seater) X3370 X4500 X5630 X6760 Cabin Size 2 (15-seater)

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