NCC 2022 Volume One - Building Code of Australia Class 2 to 9 buildings
Search the National Construction Code editions
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

Filter

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

I4

WA Part I4 Public buildings

WA Part I4 Public buildings

Introduction to this Part

WA Part I4 contains Deemed-to-Satisfy Solutions for WA public buildings that are additional to those contained in Sections D, F and I.

WA I4D1 Deemed-to-Satisfy Provisions2019: WA H101.0

(1) Where a Deemed-to-Satisfy Solution is proposed, Performance Requirements D1P1, D1P2, D1P3, D1P4, D1P6 and F6P2 are satisfied by complying with—

  1. Part D2, Part D3 and F6D5; and
  2. for additional requirements for WA public buildings, WA Part I4.

(2) Where a Performance Solution is proposed, the relevant Performance Requirements must be determined in accordance with A2G2(3) and A2G4(3) as applicable.

WA I4D2 Application of Part2019: WA H101.1

The Deemed-to-Satisfy Provisions of this Part apply to a WA public building or part of a building.

WA I4D3 Additional exits2019: WA H101.2

In a WA public buildings, each storey that accommodates more than 50 persons must have more than one exit from that storey.

WA I4D4 Goings and risers2019: WA H101.3

(1) Steps serving a WA public building must have risers not more than 180 mm and goings not less than 280 mm.

(2) The requirements of (1) do not apply to steps in a fire-isolated stairway.

WA I4D5 Handrails to ramps, flights and landings2019: WA H101.4

(1) For a WA public building, handrails must be located along—

  1. both sides of a ramp or flight; and
  2. each side of a landing, except for that part of a side that is interrupted by a ramp or flight.

(2) The requirements of (1) do not apply to—

  1. handrails referred to in D3D23; or
  2. handrails located within a fire-isolated stairway or fire-isolated ramp.

WA I4D6 Artificial lighting2019: WA H101.5

(1) Artificial lighting must be provided along the external path of travel (including steps, landings, ramps or paths) to a road or open space associated with each exit from a WA public building.

(2) The artificial lighting system required by (1) must—

  1. provide a minimum illuminance of 1 lux at ground level; and
  2. be connected to circuits separate from those supplying lighting for foyers, entry porches, emergency escape passages or areas provided entry or egress to the WA public building; and
  3. be connected over two circuits where two or more lights are required; and
  4. have switches that are not able to be operated by members of the public.

WA I4D7 Fixed seating2019: WA H101.6

Where fixed seating in a Class 9b WA public building is arranged in more than one row—

  1. aisles must be provided on both sides of every row that contains more than 10 seats; and
  2. the number of seats in a row must not exceed 42.