NATIONAL Construction Code NCC

Table 3A applications and values have been determined by the Australian Building Codes Board for use in regulations based on the NCC. It provides the minimum wet pendulum test or oil-wet inclining platform test classifications that are deemed-to­ satisfy specific applications in buildings covered by the NCC. These values may be used as acceptance criteria in a range of situations, including those where the building incorporates only the minimum regulated NCC requirements for handrails, lighting and the like.

MINIMUM WET PENDULUM TEST OR OIL-WET INCLINING PLATFORM CLASSIFICATIONS THAT ARE DEEMED-TO-SATISFY THE BUILDING APPLICATIONS IN THE NATIONAL CONSTRUCTION CODE NCC

Location Wet pendulum test Slider 96 Slider 55  
Stair Treads and Stairway Landings in Buildings Covered by NCC Volumes One and Two
Stair treads and a stairway landing (when dry) P3 35 - 44 35 - 39 R10
Stair treads and a stairway landing (when wet) P4 45 - 54 40 - 44 R11
Nosings for Stair Treads and Stairway Landings in Buildings Covered by NCC Volumes One and Two
Dry stair tread, a stair non-skid nosing strip and a stairway landing P3 35 - 44 35 - 39
Wet stair tread, a stair non-skid nosing strip and a stairway landing P4 45 - 54 40 - 44
Ramps  in Buildings Covered by NCC Volumes One and Two
Ramps not steeper than 1:14 gradient (when dry) P3 35 - 44 35 - 39 R10
Ramps not steeper than 1:14 gradient (when wet) P4 45 - 54 40 - 44 R11
Ramps steeper than 1:14 up but not steeper than  1:8 (when dry) P4 45 - 54 40 - 44 R11
Ramps steeper than I :14 up but not steeper than 1:8 (when wet) PS >54 >44 R12
NOTE: NCC compliance is demonstrated by achieving the Values set out in this Table for either the wet pendulum test or the oil-wet inclining ramp test. It is not necessary to meet both criteria.

When designing stairs and ramps, in addition to the particular requirements for slip resistance in the NCC designers should consider the following:

  • A cross-slope in floors at the top or bottom of flights of stairs could increase the risk of tripping or slipping.
  • Trip hazards may be created inadvertently by nosings and thresholds.
  • Where practicable, stair treads should have slip resistance at least equal to or greater than that of the floor at the top or bottom of the stairs.
  • The surface of stair treads should be of uniform material.
  • The geometry of stair rises and goings of stairs must comply with the NCC.
  • Provision of handrails must be consistent with the requirements of the NCC.
  • Verification of compliance