Internal planning of multi-storey flats

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When multi-storey flats do not have their own external entrance at ground level, adopt one of the following approaches.
a. Approach 1 – provide at least one alternative exit from each habitable room that is not on the entrance storey of the flat (Diagram 3.5 and paragraph 3.22).
b. Approach 2 – provide at least one alternative exit from each storey that is not the entrance storey of the flat. All habitable rooms should have direct access to a protected landing (Diagram 3.6 and paragraph 3.22).
Approach 3 – provide a protected stairway plus a sprinkler system in accordance with Appendix E (smoke alarms should also be provided in accordance with Section 1).
d. Approach 4 – if the vertical distance between the entrance storey of the flat and any of the storeys above or below does not exceed 7.5m, provide all of the following.
i. A protected stairway.
ii. Additional smoke alarms in all habitable rooms.
iii. A heat alarm in any kitchen.