NSW Education (EFSG Stairs) Building Codes & Rules

- Tools™ ensures child safety in construction design with lower handrails, continuous bends, and NCC compliance. Transforming NCC codes into interactive graphics.

Fall

Non-climbable zone

4m^[1] or more fall risk must include a NCZ
2nd Handrail is a foothold / climb risk

Non-climbable Zone (NCZ)

NCC 2022 V3

All Building Classes

NCC 2022 D3D20 [2019 D2.16a]

May 2023

NCC 2022 Vol 1, D3D20 (1)

NCC 2022 HP, 11.3.4 (8) (a)

4m or more fall risk must include an NCZ with no footholds including brackets, hinges, hardware^{NCC 2022 Vol 1, D3D20 (1)NCC 2022 Vol 1, D3D20 (1)}
150 to 760mm above finished level^{NCC 2022 HP, 11.3.4 (8) (a)NCC 2022 HP, 11.3.4 (8) (a)}

NCC 2022 Vol 2, H5P2 (1)

4m^{NCC 2022 Vol 2, H5P2 (1)} or more fall risk must include a NCZ
2nd Handrail is a foothold / climb risk

Zone for Service & Fittings

Soffit

to surface below

Balustrade (Barrier)

≥ 2

Fall (Exterior)

to surface below

≤ 18

Riser

EFSG 2.0

> 1m^{EFSG 2.0}

Tread

Non-Climbable Zone

Handrail

Landing

Flight 2 - 18 Risers

Property Line

TGSI

≤ 1:50

Nosing line

Allow for Service & Fittings

Thresholds

≤ 190mm step if onto an open space
No step allowed if required to be accessible

EFSG 2.0

865^{EFSG 2.0}

EFSG 2.0

≥ 1m^{EFSG 2.0}

Nosing line

NCC 2022 Vol 2, H5P2 (1)

Extension of Barrier &

Non-Climbable Zone

> 4m Fall risk^{NCC 2022 Vol 2, H5P2 (1)}

EFSG 2.0

700^{EFSG 2.0}

Primary School 2nd Handrail

Level 1 or above

Continuous

Handrails

Fire Door

EFSG Balustrade

AS 1428.1:2021, 8.1 (d)

≤ 25^{AS 1428.1:2021, 8.1 (d)}

NCC 2022 Vol 1, D3D25 (1) (a) (i)

≥ 500^{NCC 2022 Vol 1, D3D25 (1) (a) (i)}

AS/NZS 1428:2009, 2.3.3 (c)

300±10^{AS/NZS 1428:2009, 2.3.3 (c)}

AS/NZS 1428:2009, 2.4

300 / 600^{AS/NZS 1428:2009, 2.4}

NCC 2022 Vol 1, D2D8 (1) (a)

≥ 1m^{NCC 2022 Vol 1, D2D8 (1) (a)}

NCC 2022 Vol 1, D3D15 (a)

NCC 2022 HP, 11.2.5 (1) (b)

≤ 1:50^{NCC 2022 Vol 1, D3D15 (a)NCC 2022 HP, 11.2.5 (1) (b)}

NCC 2022 HP, 11.2.5 (1) (a)

NCC 2022 HP, 11.2.5 (2)

≥750^{NCC 2022 HP, 11.2.5 (1) (a)NCC 2022 HP, 11.2.5 (2)}

AS 1428.1:2009, 11.1

600^{AS 1428.1:2009, 11.1}

EFSG 2.0

≥ 1.3m^{EFSG 2.0}

EFSG 2.0

going

width^{EFSG 2.0}

EFSG 2.0

300±10^{EFSG 2.0}

NCC 2022 Vol 1, D3D20 (1)

NCC 2022 HP, 11.3.4 (8) (a)

760^{NCC 2022 Vol 1, D3D20 (1)NCC 2022 HP, 11.3.4 (8) (a)}

NCC 2022 Vol 1, F5D2 (8) (c)

NCC 2022 HP, 10.3.1 (1) (f)

2m clear^{NCC 2022 Vol 1, F5D2 (8) (c)NCC 2022 HP, 10.3.1 (1) (f)}

NCC 2022 Vol 1, D3D20 (1)

NCC 2022 HP, 11.3.4 (8) (a)

> 4m^{NCC 2022 Vol 1, D3D20 (1)NCC 2022 HP, 11.3.4 (8) (a)}

EFSG 2.0

865^{EFSG 2.0}

NCC 2022 Vol 1, D2D8 (1) (a)

≥ 1m^{NCC 2022 Vol 1, D2D8 (1) (a)}

NCC 2022 Vol 1, D3D14 (1) (b)

R^{NCC 2022 Vol 1, D3D14 (1) (b)}

NCC 2022 Vol 1, D3D14 (1) (b)

G^{NCC 2022 Vol 1, D3D14 (1) (b)}

NCC 2022 Vol 1, D3D20 (1)

NCC 2022 HP, 11.3.4 (8) (a)

150^{NCC 2022 Vol 1, D3D20 (1)NCC 2022 HP, 11.3.4 (8) (a)}

EFSG 2.0

≤ 100^{EFSG 2.0}

EFSG 2.0

100^{EFSG 2.0}

NCC 2022 Vol 2, H5P2 (1)

> 1m^{NCC 2022 Vol 2, H5P2 (1)}

Clear Height

≥ 2m above FFL^[1]

Bulkhead clearance

NCC 2022 V3

Height Clearance RULES

NCC 2022 V2

All Building Classes

NCC 2022 F5D2 & HP10.3.1 [2019 F3.1]

May 2023

NCC 2022 Vol 1, F5D2

NCC 2022 HP, 10.3.1 (1) (f)

Informative

Clear height for stairways measured above nosing line^{NCC 2022 Vol 1, F5D2}
Services & fittings must NOT encroach^{NCC 2022 HP, 10.3.1 (1) (f)}
Allow tolerance for construction deviations, future finishes & fittings^{InformativeInformative}

NCC 2022 Vol 1, F5D2 (8) (c)

≥ 2m above FFL^{NCC 2022 Vol 1, F5D2 (8) (c)}

EFSG 2.0

AS 1428.1:2009, 11.2 (e)

≥ 300^{EFSG 2.0AS 1428.1:2009, 11.2 (e)}

NCC 2022 Vol 1, D2D7

≥ 1.98m^{NCC 2022 Vol 1, D2D7}

NCC 2022 Vol 1, F5D2 (8) (c)

NCC 2022 HP, 10.3.1 (1) (f)

2m clear^{NCC 2022 Vol 1, F5D2 (8) (c)NCC 2022 HP, 10.3.1 (1) (f)}

Glazing

Grade A Safety Glass^[1]

Glazing FALL SAFETY

NCC 2022 V1

All Building Classes

NCC 2022 B1D4 & HP8.4.2 [2019 B1.4, 3.6.4.1]

May 2023

AS 1288:2021, 5.16 (b)

AS 1288:2021, 5.16 (a)

Safety Glazing Assemblies to be structurally sound to the NCC
Grade A safety glass if
< 2m from bottom Riser of Flight, and^{AS 1288:2021, 5.16 (b)}
< 1m above Nosing line^{AS 1288:2021, 5.16 (a)}

AS 1288:2021, 5.16 (b)

Grade A Safety Glass^{AS 1288:2021, 5.16 (b)}

Nosings

P4 or R11 slip resistance^[1]
30% luminance contrast^[2]

Slip RATING

NCC 2022 V3

All Building Classes

NCC 2022 D3D15 & HP11.2.4 [2019 D2.14, 3.9.1.4]

May 2023

NCC 2022 Vol 1, D3D15

NCC 2022 HP, 11.2.4

HB 198:2014, 4.3.2 (Table 3A)

HB 198:2014, 5.2 (Table 3B)

Areas with a risk of slipping due to the surface conditions, to ensure safety and be slip-resistant to the NCC^{NCC 2022 Vol 1, D3D15NCC 2022 HP, 11.2.4}
Slip Resistance for pedestrian surfaces along stairs, see Table below^{HB 198:2014, 4.3.2 (Table 3A)HB 198:2014, 5.2 (Table 3B)}

Nosing RULES

NCC 2022 V3

Class 2 to 9

NCC 2022 D3, H5D3 & 11.2 [2019 D2.0, 3.9.1]

May 2023

NCC 2022 Vol 1, S15C4 (b)

AS 1428.1:2021, 8.1 (e) (ii)

NCC 2022 HP, 11.2.4 (2) (b)

NCC 2022 Vol 1, D3D14 (1) (e) (ii)

NCC 2022 Vol 2, H5D2

AS 1428.1:2021, 8.1 (d)

Stairways and Ramps to ensure safe movement and access in accordance to the NCC
Required on a stair in an Accessible Path of Travel
30% luminance contrast^{NCC 2022 Vol 1, S15C4 (b)}
≤ r 5mm Nosing profile^{AS 1428.1:2021, 8.1 (e) (ii)}
Slip resistance^{NCC 2022 HP, 11.2.4 (2) (b)NCC 2022 Vol 1, D3D14 (1) (e) (ii)NCC 2022 Vol 2, H5D2}
P4 or R11 subject to wetting
P3 or R10 dry conditions
An off the shelf profile must be AS 1428.1 compliant
Nosing must not project beyond face of riser^{AS 1428.1:2021, 8.1 (d)}

Non Slip TESTING & MAINTENANCE

NCC 2022 V1

Material SAFETY

NCC 2022 V1

AS 1428.1:2009, 11.1 (f)

HB 198:2014, 4.3.2 (Table 3A)

P4 or R11 slip resistance^{AS 1428.1:2009, 11.1 (f)}
30% luminance contrast^{HB 198:2014, 4.3.2 (Table 3A)}

Clear Width

≥ 1m Public Stair^[1]

Landing CLEARANCES

NCC 2022 V3

Class 2 to 9

NCC 2022 D2D8 & HP11.2.5 [2019 D1.4]

May 2023

NCC 2022 HP, 11.3.5

NCC 2022 HP, 11.2.5 (1) (a)

≥ 1m clearance between handrails (public)^{NCC 2022 HP, 11.3.5}
Mid landing must not be narrower than flight
Larger clear width may be required by NCC
≥ 500mm clear from a door leaf opening into a fire stair^{NCC 2022 HP, 11.2.5 (1) (a)}

NCC 2022 Vol 1, D2D8 (1) (a)

≥ 1m Public Stair^{NCC 2022 Vol 1, D2D8 (1) (a)}

EFSG 2.0

AS 1428.1:2009, 11.2 (e)

≥ 300^{EFSG 2.0AS 1428.1:2009, 11.2 (e)}

Landings

≥ 750mm length^[1][2]

Landing CLEARANCES

NCC 2022 V4

Class 2 to 9

NCC 2022 D2D8 & HP11.2.5 [2019 D1.4]

May 2023

NCC 2022 HP, 11.3.5

NCC 2022 HP, 11.2.5 (1) (a)

EFSG 2.0

≥ 1m clearance between handrails (public)^{NCC 2022 HP, 11.3.5}
≥ 500mm clear from a door leaf opening into a fire stair^{NCC 2022 HP, 11.2.5 (1) (a)}
Mid landing must not be narrower than flight^{EFSG 2.0}
Larger clear width may be required by NCC^{EFSG 2.0}

NCC 2022 HP, 11.2.5 (1) (a)

NCC 2022 Vol 1, D3D15 (a) (i)

≥ 750mm length^{NCC 2022 HP, 11.2.5 (1) (a)NCC 2022 Vol 1, D3D15 (a) (i)}

Doors

Must swing in direction of Egress^[1]
≤ 500mm encroachment on required width^[2]
≥ 1.98m unobstructed door height^[3]

Door Swing RULES

NCC 2022 V2

Class 2 to 9

NCC 2022 D3D25 [2019 D2.20]

May 2023

NCC 2022 Vol 1, D3D25

NCC 2022 Vol 1, D3D25 (1) (a)

NCC 2022 Vol 1, D3D25 (1) (b) (i)

In a required exit must not encroach^{NCC 2022 Vol 1, D3D25}
> 500mm swing path into the required width
> 100mm when fully open (including handles)
Must swing in the direction of travel unless
Serves ≤ 200m² building area & has a Hold Open Device^{NCC 2022 Vol 1, D3D25 (1) (a)}
Serves a Sanitary Compartment or Airlock^{NCC 2022 Vol 1, D3D25 (1) (b) (i)}

Door Egress Clearance RULES

NCC 2022 V1

All Building Classes

NCC 2022 D2D7 to 11 [2019 D1.6]

May 2023

NCC 2022 Vol 1, D2D7

NCC 2022 Vol 1, D2D9 (c)

≥ 1.98m height^{NCC 2022 Vol 1, D2D7}
≥ Required unobstructed exit width - 250mm^{NCC 2022 Vol 1, D2D9 (c)}
≥ 750mm for most Class 2 to 9 where unobstructed exit width ≥ 1m
Width increases where the aggregate width of unobstructed exit > 1m
No requirements if access is only to a sanitary compartment or bathroom

NCC 2022 Vol 1, D2D7

NCC 2022 Vol 1, D3D25 (1) (a) (i)

NCC 2022 Vol 1, D3D25 (1) (b)

Must swing in direction of Egress^{NCC 2022 Vol 1, D2D7}
≤ 500mm encroachment on required width^{NCC 2022 Vol 1, D3D25 (1) (a) (i)}
≥ 1.98m unobstructed door height^{NCC 2022 Vol 1, D3D25 (1) (b)}

EFSG Balustrade

≥ 1m for ground level^[1]
≥ 1.3m for L1 & above^[2]
Ø 125mm sphere unable to pass between landing or nosing line & bottom rail of barrier^[3][4]
4m or more fall risk must include a NCZ^[5][6]

Non-climbable Zone (NCZ)

NCC 2022 V1

All Building Classes

NCC 2022 D3D20 & HP11.3.4 [2019 D2.16a, 3.9.2.3]

May 2023

NCC 2022 Vol 1, D3D20 (1)

NCC 2022 HP, 11.3.4 (8) (a)

4m or more fall risk must include an NCZ with no footholds including brackets, hinges, hardware^{NCC 2022 Vol 1, D3D20 (1)NCC 2022 Vol 1, D3D20 (1)}
150 to 760mm above finished level^{NCC 2022 HP, 11.3.4 (8) (a)NCC 2022 HP, 11.3.4 (8) (a)}

Balustrade RULES

NCC 2022 V4

All Building Classes

NCC 2022 D3D17 to 21 [2019 D2.16]

May 2023

NCC 2022 Vol 1, D3D17 (1) (d)

NCC 2022 HP, 11.3.3 (1) (d)

NCC 2022 HP, 11.3.4 (4)

NCC 2022 Vol 1, D3D21

NCC 2022 Vol 1, D3D19 (1)

EFSG 2.0

≥ 1m high^{NCC 2022 Vol 1, D3D17 (1) (d)}
≥ 1m or more fall risk requires a balustrade^{NCC 2022 HP, 11.3.3 (1) (d)NCC 2022 HP, 11.3.4 (4)}
Ø 125mm sphere unable to pass between landing or nosing line & bottom rail of barrier^{NCC 2022 Vol 1, D3D21NCC 2022 Vol 1, D3D19 (1)}
Wire barriers to be spaced & tensioned to ensure compliance^{EFSG 2.0}

Class 7 & 8 Balustrade RULES

NCC 2022 V1

Class 7 & 8

NCC 2022 Vol 1, D3D19 [2019 D2.16a]

May 2023

NCC 2022 Vol 1, D3D19 (3) (a)

NCC 2022 Vol 1, D3D19 (3) (b)

Ø 300mm sphere unable to pass between any opening^{NCC 2022 Vol 1, D3D19 (3) (a)}, or
Rail spacing^{NCC 2022 Vol 1, D3D19 (3) (b)}
≤ 150mm from Landing or Nosing Line to lower Rail
≤ 460mm between upper Rails

Balustrade BEST PRACTICE

NCC 2022 V2

Any balustrade system to withstand expected loads
Must be designed and structurally certified
Dependent on the location and use
Glazed systems rely on a common rail or specialized laminated glass to prevent fall if a panel fails
Confirm acceptance of system & selection with owner & certifier
Where a balustrade meets a window or other uneven element, mullion or transom, openings may become larger than allowed
Ø 125mm opening compliance may be affected
Risk for climbing
Fixed furniture, taps etc. must not be installed near a balustrade
Wire balustrades
Avoid as this requires regular maintenance
Have high certification failure rate & facilitate climbing

Fire-isolated Stair RULES

NCC 2022 V3

Class 2 to 9

NCC 2022 D3D17 to 21 [2019 D2.16]

May 2023

NCC 2022 Vol 1, D3D19

NCC 2022 Vol 1, D3D19 (4)

NCC 2022 Vol 1, D3D19 (3) (b)

NCC 2022 Vol 1, D3D19 (2)

Part of an emergency egress path only^{NCC 2022 Vol 1, D3D19}
Ø 125 Sphere Rule applies to all^{NCC 2022 Vol 1, D3D19 (4)}
External Stairs & Ramps
Class 9b Early Childhood Centres
Ø 300mm sphere unable to pass between any opening^{NCC 2022 Vol 1, D3D19 (3) (b)}, or
Rail spacing^{NCC 2022 Vol 1, D3D19 (2)}
≤ 150mm from Landing or Nosing Line to lower Rail
≤ 460mm between upper Rails

NCC 2022 HP, 11.3.4 (8) (a)

NCC 2022 HP, 11.3.4 (4)

NCC 2022 Vol 1, D3D20 (1)

NCC 2022 Vol 1, D3D19 (1)

EFSG 2.0

≥ 1m for ground level^{NCC 2022 HP, 11.3.4 (8) (a)}
≥ 1.3m for L1 & above^{NCC 2022 HP, 11.3.4 (4)}
Ø 125mm sphere unable to pass between landing or nosing line & bottom rail of barrier^{NCC 2022 Vol 1, D3D20 (1)NCC 2022 Vol 1, D3D19 (1)}
4m or more fall risk must include a NCZ^{EFSG 2.0EFSG 2.0}

Tactile indicators (TGSI)

300±10mm from nosing^[1][2]
600 to 800mm depth^[3]

Tactile Indicator OPTIONS

NCC 2022 V1

Tactile Ground Surface Indicators (TGSI)

NCC 2022 V3

Class 2 to 9

NCC 2022 D4D9, S15, & I2D11

[2019 D3.8, D3.6, H2.11]

May 2023

AS/NZS 1428.4.1:2009, 2.3.3 (c)

AS/NZS 1428.4.1:2009, 2.4

NCC 2022 Vol 1, D4D9

AS/NZS 1428.4.1:2009, 2.4

AS/NZS 1428.4.1:2009, Appendix C3

Informative

Changes in direction to be tangibly indicated in compliance to the NCC^{AS/NZS 1428.4.1:2009, 2.3.3 (c)}
Starts 300±10mm^{AS/NZS 1428.4.1:2009, 2.4} from nosing, &
Full width of Stair^{NCC 2022 Vol 1, D4D9}
600 to 800mm depth if an open Stair, or
300 to 400mm depth if an enclosed Stair with Landing ≤ 3m
Not required where outer handrail is continuous & Landing ≤ 3m^{AS/NZS 1428.4.1:2009, 2.4}
Not required in a fire stair^{AS/NZS 1428.4.1:2009, Appendix C3}
Must be within property boundary^Informative

EFSG 2.0

AS 1428.1:2009, 11.1

300±10mm from nosing^{EFSG 2.0AS 1428.1:2009, 11.1}
600 to 800mm depth^{AS 1428.1:2009, 11.1}

Tactile Indicators (TGSI)

300 ± 10mm from nosing^[1]
300 to 400mm depth if
Landing ≤ 3m, or^[2]
Outer handrail not continuous

Tactile Indicator OPTIONS

NCC 2022 V1

Tactile Ground Surface Indicators (TGSI)

NCC 2022 V3

Class 2 to 9

NCC 2022 D4D9, S15, & I2D11

[2019 D3.8, D3.6, H2.11]

May 2023

AS/NZS 1428.4.1:2009, 2.3.3 (c)

AS/NZS 1428.4.1:2009, 2.4

NCC 2022 Vol 1, D4D9

AS/NZS 1428.4.1:2009, 2.4

AS/NZS 1428.4.1:2009, Appendix C3

Informative

Changes in direction to be tangibly indicated in compliance to the NCC^{AS/NZS 1428.4.1:2009, 2.3.3 (c)}
Starts 300±10mm^{AS/NZS 1428.4.1:2009, 2.4} from nosing, &
Full width of Stair^{NCC 2022 Vol 1, D4D9}
600 to 800mm depth if an open Stair, or
300 to 400mm depth if an enclosed Stair with Landing ≤ 3m
Not required where outer handrail is continuous & Landing ≤ 3m^{AS/NZS 1428.4.1:2009, 2.4}
Not required in a fire stair^{AS/NZS 1428.4.1:2009, Appendix C3}
Must be within property boundary^Informative

AS/NZS 1428:2009, 2.4

AS/NZS 1428:2009, 2.3.3 (c)

300 ± 10mm from nosing^{AS/NZS 1428:2009, 2.4}
300 to 400mm depth if
Landing ≤ 3m, or^{AS/NZS 1428:2009, 2.3.3 (c)}
Outer handrail not continuous

Storage Under Stairs

Fire-isolated Stair
Not allowed^[1]
Required non Fire-isolated Stair
60/60/60 FRL^[2]

Enclosure Under Stair RULES

NCC 2022 V1

Class 2 to 9

NCC 2022 D3D9 [2019 D2.8]

May 2023

NCC 2022 Vol 1, D3D9 (1)

NCC 2022 Vol 1, D3D9 (2) (a)

NCC 2022 Vol 1, D3D9 (2) (b)

Fire-isolated Stair
Must not be enclosed to form a cupboard or similar enclosed space^{NCC 2022 Vol 1, D3D9 (1)}
Required non Fire-isolated Stair (including external Stairway) may be enclosed with
60/60/60 FRL Walls & ceiling^{NCC 2022 Vol 1, D3D9 (2) (a)}
-/60/30 FRL self-closing Fire Door^{NCC 2022 Vol 1, D3D9 (2) (b)}
Stairs within an SOU or non-required egress path may be enclosed

NCC 2022 Vol 1, D3D9 (1)

NCC 2022 Vol 1, D3D9 (2) (a)

Fire-isolated Stair
Not allowed^{NCC 2022 Vol 1, D3D9 (1)}
Required non Fire-isolated Stair
60/60/60 FRL^{NCC 2022 Vol 1, D3D9 (2) (a)}

EFSG Handrails

700mm & 865mm high Double Handrail^[1]
Ø 33mm Galvanised^[2]
Required both sides if width > 2m^[3]

Handrail PRIMARY SCHOOL

NCC 2022 V2

Class 9b (Primary School)

NCC 2022 D3D22(1)(c) [2019 D2.17 (a)(iii)]

May 2023

NCC 2022 Vol 1, D3D22 (1) (c) (ii) (A)

An additional 2nd lower handrail is required in primary school buildings to allow for easy use by children^{NCC 2022 Vol 1, D3D22 (1) (c) (ii) (A)}
750 to 665mm high & continuous at landings^{NCC 2022 Vol 1, D3D22 (1) (c) (ii) (A)}

Handrail DURABILITY

NCC 2022 V3

Handrail ACCESSIBILITY

NCC 2022 V5

All Building Classes

NCC 2022 D3D22 & HP11.3.5 [2019 D2.17, 3.9.2.4]

May 2023

AS 1428.1:2021, 9 (b)

NCC 2022 Vol 1, D3D22 (1) (b)

AS 1428.1:2021, 9 (b)

NCC 2022 Vol 1, D3D22

Handrails to be provided in compliance to the NCC^{AS 1428.1:2021, 9 (b)}
Ø 30 to 52mm^{NCC 2022 Vol 1, D3D22 (1) (b)}
Both sides if width of stair is > 2m (Public)^{AS 1428.1:2021, 9 (b)}
Any stair in an Accessible Path of Travel or an Accessible Sole Occupancy Unit to have handrails to both sides
Both handrails continuous around landings except at doors, fire services etc.
Exposed edges & corners ≥ r 5mm^{NCC 2022 Vol 1, D3D22}

Handrail GEOMETRY

NCC 2022 V3

EFSG 2.0

700mm & 865mm high Double Handrail^{EFSG 2.0}
Ø 33mm Galvanised^{EFSG 2.0}
Required both sides if width > 2m^{EFSG 2.0}

Treads & Risers

2 to 18 risers in a single flight^[1]
115 to 190mm Riser^[2]
250 to 355mm Going (240mm if a private stair)
± 5mm per tread & ± 10mm overall Tolerance^[3]
Ø 125mm sphere unable to pass through an open riser^[4]

Slip RATING

NCC 2022 V2

All Building Classes

NCC 2022 D3D15 & HP11.2.4 [2019 D2.14, 3.9.1.4]

May 2023

null

Riser & Going RULES

NCC 2022 V5

All Building Classes

NCC 2022 D3D14 [2019 D2.13]

May 2023

NCC 2022 HP, 11.2.2 (1) (e)

NCC 2022 Vol 1, D3D14 (1) (f)

Opaque Risers required in a Continuous Accessible Path of Travel
Solid treads are required if
> 10m high stairway
> 3 storeys connected^{NCC 2022 HP, 11.2.2 (1) (e)NCC 2022 Vol 1, D3D14 (1) (f)}

Tread & Riser BEST PRACTICE

NCC 2022 V2

No single Riser Stairs
Generally not permitted
≤ 1 : 50 gradient to landing
Step ramp 1 : 10 at ≤ 190mm height preferred
For stairways adjoining a sloping walkway
DO NOT allow the last tread to follow the sloping gradient

NCC 2022 HP, 11.2.2 (5)

NCC 2022 HP, 11.2.2 (1) (a)

NCC 2022 HP, 11.2.2 (1) (c) (ii)

NCC 2022 HP, 11.2.2 (1) (d)

2 to 18 risers in a single flight^{NCC 2022 HP, 11.2.2 (5)}
115 to 190mm Riser^{NCC 2022 HP, 11.2.2 (1) (a)}
250 to 355mm Going (240mm if a private stair)
± 5mm per tread & ± 10mm overall Tolerance^{NCC 2022 HP, 11.2.2 (1) (c) (ii)}
Ø 125mm sphere unable to pass through an open riser^{NCC 2022 HP, 11.2.2 (1) (d)}