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Slip Resistance Values (SRV’s)

Slip resistance values are a measure of how much grip a surface provides, especially when in wet and slippery conditions. Although staircases are an integral part of any building, they also pose a significant safety concern, especially when it comes to slip and fall accidents. In the UK, regulations and guidelines are in place to ensure that stairs are as safe as possible. One critical element in achieving this safety is the slip resistance of stair nosings.

For stairs, slip resistance is crucial to prevent accidents. In the UK, the Building Regulations and the Workplace (Health, Safety, and Welfare) Regulations place an emphasis on the importance of safe staircases. Slip-resistant stair nosings are a fundamental part of meeting these requirements.

Measuring Slip Resistance

Stair nosings come in various materials and designs, each with different slip-resistant properties. To ensure safety, these properties are measured using specific tests and standards. In the UK, the Health and Safety Executive (HSE) provides guidelines for measuring slip resistance. One of the most common methods is the pendulum test, where a device simulates a person’s walking motion and measures the friction between the surface and the test slider.

The Pendulum Test Value (PTV)

The Pendulum Test Value (PTV) is a commonly used measurement of slip resistance in the UK. It quantifies the slip resistance of a surface on a scale from 0 to 100, where higher values indicate a higher degree of slip resistance. The minimum PTV required for stair nosings varies depending on the location, but it generally falls in the range of 36 to 40 for public areas, ensuring that they are suitably slip-resistant.

CAT Slip Resistance Values (SRV)

CAT stair nosing infills and treads have been independently tested for slip resistance values (SRV). For use in dry conditions, all our stair nosings and infill test results show a low risk of slip, contributing to the overall safety aspect of interior staircase installations.

CAT also manufactures a range of purposely designed heavy-duty aluminium stair nosings for use in external or wet areas. See our Olympic range here.

The values published are for the normal direction of travel when installed on stairs, i.e., ascending and descending. It must be noted that many factors will contribute to the safety of stairs, not solely the floor covering or the stair nosing fitted.

Footwear worn, poor maintenance, obstructions, surface contaminants, hurrying, distraction and the influence of alcohol and drugs all have a significant impact on stair safety. End users and facilities managers should consider regular inspection of stair installations and act to minimise the risks within their control. Please get in touch with our sales office for more information and advice.​

Test Method

​The independent test method used is the Pendulum 4S in conjunction with the guidelines recommended by the UK Slip Resistance Group. UK Slip Resistance Group classified the degree of slip resistance as shown below.

ClassificationPendulum Test Value (PTV)
High Slip Potential0 – 24 PTV
Moderate Slip Potential25 – 35 PTV
Low Slip Potential36+

In the UK, ensuring the safety of staircases is of paramount importance, and slip-resistant stair nosings are a crucial component in achieving this goal. Understanding slip-resistant values, such as the Pendulum Test Value (PTV), and choosing the right stair nosings can help mitigate the risk of slip and fall accidents on stairs. By prioritising safety through slip resistance, we can create a safer environment for everyone.

Our PTV Tested Infills and Treads

Castellated PVC Infill – Standard Supply

SRV    PTV Dry 85 — PTV Wet 76

Smooth Textured PVC Infill

SRV    PTV Dry 65 — PTV Wet 56

ATI 49.5, ATI 37.25 and BTI 49.5 Tread Inserts

SRV    PTV Dry 82 — PTV Wet 54

Olympic Grip

SRV    PTV Dry 102 — PTV Wet 71

Olympic Carborundum

SRV    PTV Dry 92 — PTV Wet 86

Ribbed Treads – Brass & Aluminium

SRV    PTV Dry 73— PTV Wet 45

Castellated Treads – Aluminium

SRV    PTV Dry 82 — PTV Wet 54

Chequer Plate Treads

SRV    PTV Dry 73 — PTV Wet 46