NCC 2022 Volume One - Building Code of Australia Class 2 to 9 buildings
Classification
Building class 1a Building class 1b Building class 2 Building class 3 Building class 4 Building class 5 Building class 6 Building class 7a Building class 7b Building class 8 Building class 9a Building class 9b Building class 9c Building class 10a Building class 10b Building class 10c

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Classification
Building class 1a Building class 1b Building class 2 Building class 3 Building class 4 Building class 5 Building class 6 Building class 7a Building class 7b Building class 8 Building class 9a Building class 9b Building class 9c Building class 10a Building class 10b Building class 10c

D2

Part D2 Provision for escape

Part D2 Provision for escape

SA D2D3 Number of exits required2019: D1.2

Delete subclause D2D3(2) and insert SA D2D3(2) as follows:

(2) Class 2 to 8 buildings — In addition to any horizontal exit, not less than 2 exits must be provided from the following:

  1. Each storey if the building has an effective height of more than 25 m.
  2. A Class 2 or 3 building subject to C2D6.
  3. A storage shed in a bulk grain storage facility if the distance of travel to an exit is more than 150 m.
  4. The gallery level in a cell type silo in a bulk grain storage facility.

SA D2D4 When fire-isolated stairways and ramps are required2019: D1.3

Delete subclause D2D4(2) and insert SA D2D4(2) as follows:

(2) Class 5, 6, 7, 8 or 9 buildings — Every stairway or ramp serving as a required exit must be fire-isolated unless—

  1. in a Class 9a health-care building — it connects, or passes through or passes by not more than 2 consecutive storeys in areas other than patient care areas; or
  2. it is part of an open spectator stand; or
  3. in any other case except in a Class 9b early childhood centre or a Class 9c building, it connects, passes through or passes by not more than 2 consecutive storeys and one extra storey of any classification may be included if—
    1. the building has a sprinkler system (other than a FPAA101D system) complying with Specification 17 installed throughout; or
    2. the required exit does not provide access to or egress for, and is separated from, the extra storey by construction having—
      1. an FRL of –/60/60, if non-loadbearing; and
      2. an FRL of 90/90/90 for Type A construction or 60/60/60 for Type B or C construction, if loadbearing; and
      3. no opening that could permit the passage of fire or smoke; or
  4. it is a required exit from a bulk grain storage facility and there are no window or door openings within 3 m of the stairway, ramp or ladder.

SA D2D5 Exit travel distances2019: D1.4

Insert SA subclause D2D5(7) in clause D2D5 as follows:

(7) Farm buildings — Notwithstanding (3), in a farm building—

  1. no point on the floor must be more than 20 m from an exit, or a point from which travel in different directions to 2 exits is available, in which case the maximum distance to one of those exits must not exceed 60 m; and
  2. in a machinery room, plant-room or the like, the distance to a single exit serving a storey at the level of access to a road or open space may be increased to 30 m.

SA D2D5 Exit travel distances2019: D1.4

Insert SA subclause D2D5(8) in clause D2D5 as follows:

(8) Bulk grain storage facilities — Notwithstanding (3), in a bulk grain storage facility — where required exits are spaced not more than 100 m apart, the travel distance to an exit in a cell type silo or a storage shed is not limited.

SA D2D6 Distance between alternative exits2019: SA D1.5(e)

Delete clause D2D6 and insert SA D2D6 as follows:

Exits that are required as alternative means of egress must be—

  1. distributed as uniformly as practicable within or around the storey served and in positions where unobstructed access to at least 2 exits is readily available from all points on the floor including lift lobby areas; and
  2. not less than 9 m apart; and
  3. not more than—
    1. in a Class 2 or 3 building — 45 m apart; or
    2. in a Class 9a health-care building, if such required exit serves a patient care area — 45 m apart; or
    3. in all other cases — 60 m apart; and
  4. located so that alternative paths of travel do not converge such that they become less than 6 m apart; and
  5. notwithstanding (c), exits that are required as alternative means of egress in a farm building must not be more than 80 m apart.

SA D2D14 Travel by non-fire-isolated stairways or ramps2019: D1.9

Insert SA subclause D2D14(7) in clause D2D14 as follows:

(7) In a bulk grain storage facility, the distance from any point on the floor to a point of egress to a road or open space by way of a non-fire-isolated stairway, non-fire-isolated ramp or ladder is not limited.

SA D2D21 Plant rooms, lift machine rooms and electricity network substations: Concession2019: D1.16

Insert SA subclause D2D21(3) in clause D2D21 as follows:

(3) In a bulk grain storage facility, a stair or ladder complying with AS 1657 may be used as an alternative means of egress from a cell type silo.