Part D3 Construction of exits
NSW D3D2 Application of Part2019: NSW D2.1(c)
- D3D14, D3D15(a), D3D17, D3D18, D3D19, D3D20, D3D22(5), D3D22(6), D3D26 and D3D29, the Deemed-to-Satisfy Provisions of this Part do not apply to the internal parts of a sole-occupancy unit in a Class 3 building; and
- D3D14, D3D15(a), D3D17, D3D18, D3D19, D3D20, D3D22(5), D3D22(6), D3D23 and D3D29, the Deemed-to-Satisfy Provisions of this Part do not apply to the internal parts of a sole-occupancy unit in a Class 2 building or Class 4 part of a building.
NSW D3D14 Goings and risers2019: D2.13
- not more than 18 and not less than 2 risers in each flight; and
- going (G), riser (R) and quantity (2R + G) in accordance with Table D3D14, except as permitted by (2) and (3); and
- constant goings and risers throughout each flight, except as permitted by (2) and (3), and the dimensions of goings (G) and risers (R) in accordance with (1)(b) are considered constant if the variation between—
- risers which do not have any openings that would allow a 125 mm sphere to pass through between the treads; and
- treads which have—
- treads of solid construction (not mesh or other perforated material) if the stairway is more than 10 m high or connects more than 3 storeys; and
- in a Class 9b building, not more than 36 risers in consecutive flights without a change in direction of at least 30°; and
- in the case of a required stairway, no winders in lieu of a landing; and
- conspicuous edges to the treads of steps in a Class 9b building used as an entertainment venue; and
- in a Class 9b building used as an entertainment venue, not more than one helical stairway serving as a required exit and that stairway must—
- have a width of not less than 1500 mm; and
- be of constant radius; and
- be constructed so that each tread, when measured 500 mm in from its narrow end, has a width of at least 280 mm; and
- in a Class 9b building used as an entertainment venue, in a curved stairway serving as a required exit — an internal radius of not less than twice the width of the stair.
NSW D3D16 Thresholds2019: D2.15, NSW D2.15(d), (e)
The threshold of a doorway must not incorporate a step or ramp at any point closer to the doorway than the width of the door leaf unless—
- in patient care areas in a Class 9a health-care building, the door sill is not more than 25 mm above the finished floor level to which the doorway opens; or
- in resident use areas in a Class 9c building, a ramp is provided with a maximum gradient of 1:8 for a maximum height of 25 mm over the threshold; or
- in a building required to be accessible by Part D4, the doorway—
- opens to a road or open space; and
- is provided with a threshold ramp or step ramp in accordance with AS 1428.1; or
- in a Class 9b building used as an entertainment venue, the door sill of a doorway opening to a road, open space, external stair landing or external balcony is not more than 50 mm above the finished floor level to which the doorway opens; or
- in other cases—
- the doorway opens to a road or open space, external stair landing or external balcony; and
- the door sill is not more than 190 mm above the finished surface of the ground, balcony, or the like, to which the doorway opens.
NSW D3D18 Height of barriers2019: Table D2.16a
- For stairways or ramps with a gradient of 1:20 or steeper — 865 mm.
- For landings to a stair or ramp where the barrier is provided along the inside edge of the landing and does not exceed 500 mm in length — 865 mm.
- In front of fixed seating on a mezzanine or balcony within an auditorium in a Class 9b building—
- In a Class 9b building used as an entertainment venue, for stairways and ramps and the floor of any access path, balcony, landing or the like—
- 1 m when provided inside the building; and
- 1200 mm when provided externally to the building.
- For all other locations — 1 m.
NSW D3D24 Doorways and doors2019: D2.19
- must not be fitted with a revolving door; and
- must not be fitted with a roller shutter or tilt-up door unless—
- must not be fitted with a sliding door unless—
- it leads directly to a road or open space; and
- the door is able to be opened manually under a force of not more than 110 N; and
- if fitted with a door which is power-operated—
- it must be able to be opened manually under a force of not more than 110 N if there is a malfunction or failure of the power source; and
- if it leads directly to a road or open space it must open automatically if there is a power failure to the door or on the activation of a fire or smoke alarm anywhere in the fire compartment served by the door; and
- in a Class 9b building used as an entertainment venue—
- must not be fitted with a collapsible gate, accordion door, turnstile or rigid barrier; and
- if fitted with a door, must be—
- a swing door which opens in the direction of egress; and
- doors hung in two folds where the unobstructed width of the doorway is more than 1 m; and
- a doorway or opening within sight of the audience but not intended for egress must have a notice displayed clearly indicating its purpose and such a notice must not be internally illuminated; and
- notwithstanding (2)(c), a sliding door may be fitted where—
- it leads directly to a road or open space and forms a main entrance; and
- it is capable of swinging in the direction of egress when pressure is applied to the inside face of the door; and
- the door is provided with signage that clearly indicates to persons seeking egress, the potential for swinging the door open in an emergency.
NSW D3D26 Operation of latch2019: D2.21
- without a key from the side that faces a person seeking egress; and
- by a single hand pushing action on a single device such as a panic bar located between 900 mm and 1.2 m from the floor; and
- where a two-leaf door is fitted, the provisions of (a) and (b) need only apply to one door leaf if the appropriate requirements of D2D9 are satisfied by the opening of that one leaf; and
- where the door is a door in a path of travel providing re-entry to the building from a balcony, terrace or the like, it may be fitted with key-operated fastenings only, the tongues of which must be locked in the retracted position whenever the building is occupied by the public, so the door can yield to pressure.
NSW D3D26 Operation of latch2019: D2.21
- on a door, the single device operating the latch or bolts must be a panic bar if those doors are to be secured; or
- an exit door or gate used by the public as the main entrance may be fitted with key-operated fastenings only, the tongues of which must be locked in the retracted position whenever the building is occupied by the public so the door or gate can yield to pressure from within; or
- a door from a balcony, terrace or the like, being a door in a path of travel providing re-entry to the building, may comply with the locking provision of (b) above.