Part C3 Compartmentation and separation

(3) A Class 9c building must comply with the following:

1. A building must be divided into areas not more than 500 m² by smoke proof walls complying with Specification 11.
2. A fire compartment must be separated from the remainder of the building by fire walls and notwithstanding C3D8 and Specification 5, floors with an FRL of not less than 60/60/60.
3. Except for walls provided in accordance with (3)(a) and (b), non-loadbearing internal walls, and if a building is of Type C construction — all internal walls, between and bounding sole-occupancy units and bounding a public corridor in a resident use area must:
   1. be lined on each side with standard grade plasterboard not less than 13 mm thick or a material with at least an equivalent level of fire protection; and
   2. if provided with cavity insulation, contain only non-combustible insulation; and
   3. extend to the underside of—
      1. the floor next above; or
      2. a ceiling lined with standard grade plasterboard not less than 13 mm thick or an equivalent non-combustible material; or
      3. a non-combustible roof covering; and
   4. not incorporate any penetrations above door head height unless the penetrations are adequately stopped to prevent the free passage of smoke; and
   5. be smoke sealed with intumescent putty or other suitable material at any construction joint, space or the like between the top of the wall and the floor, ceiling or roof.
4. Loadbearinginternal walls must comply with the requirements of Specification 5 and (c)(ii), (iii), (iv) and (v) above.
5. Ancillary use areas containing equipment or materials that are a high potential fire hazard, must be separated from the sole-occupancy units by smoke proof walls complying with Specification 11.
6. The ancillary use areas referred to in (e) include, but are not limited to, the following:
   1. A kitchen and related food preparation areas having a combined floor area of more than 30 m².
   2. A laundry, where items of equipment are of the type that are potential fire sources (e.g. gas fire dryers).
   3. Storage rooms greater than 10 m² used predominantly for the storage of administrative records.
7. Openings in fire walls must be protected as follows:
   1. Doorways — self-closing or automatic closing –/60/30 fire doors.
   2. Windows — automatic or permanently fixed closed –/60/– fire windows or –/60/– automatic fire shutters.
   3. Other openings — construction having an FRL not less than –/60/–.