How is Slip Resistance Tested? Inside the ASTM F2913-24 SRO Standard

Understanding Slip Resistance

Every jobsite brings its own hazards. Among the most common are slips caused by water, oil, or fine dust on the floor. To control that risk, work boots are tested under ASTM F2913-24, a North American standard that measures slip performance.

The F2913 method evaluates how a boot grips the ground while in motion. It defines the level of traction required to earn the SRO (Slip-Resistant Outsole) rating, confirming that a boot maintains grip across a variety of surfaces.

How the ASTM F2913-24 Test Works

ASTM F2913 uses a mechanical slip meter to record traction during a walking motion. Each outsole sample is tested under controlled pressure, speed, and surface conditions.

• Surfaces: smooth ceramic tile and polished steel
• Conditions: wet with detergent and coated with oil
• Measurement: dynamic coefficient of friction (DCOF)
• Target: DCOF value of 0.40 or higher on wet surfaces

The result is a consistent numerical score that shows how well a boot maintains traction under realistic jobsite conditions.

The Role of Intertek

Intertek is a globally accredited testing organisation recognised for footwear performance verification. Its laboratories follow ISO 17025 requirements and use calibrated instruments designed for CSA and ASTM standards.

Intertek reports provide measurable data on how a product performs. For manufacturers, that documentation confirms compliance with safety benchmarks. For buyers, it provides assurance that the product’s claims are supported by evidence.

MooseLog Timber: SRO Verified by Intertek

MooseLog submitted its Timber composite-toe work boot to Intertek for complete ASTM F2913-24 testing. The boot’s SafeTread™ rubber outsole was evaluated in wet and oily conditions.

The Timber outsole achieved DCOF results above the required threshold in every category. Intertek classified it as SRO compliant, confirming that Timber meets the recognised North American standard for slip resistance.

Heat Resistance Testing and HRO Classification

In addition to slip performance, Timber was evaluated for outsole heat resistance, another important factor in demanding worksites.
Intertek performed the test using the ASTM and ISO heat-contact method, which exposes the outsole to a 300°C (572°F) surface for 60 seconds.
To pass, the rubber must retain integrity without cracking, melting, or losing adhesion.

The Timber outsole maintained full structural stability and elasticity throughout the exposure period.
This result qualifies it for the HRO (Heat-Resistant Outsole) classification, indicating that the material can withstand brief contact with high-temperature surfaces such as metal flooring, asphalt, or machinery housings.

Workers in welding, mechanical, and heavy-industrial environments benefit from this resistance because it prevents sole deformation and early wear when working around radiant heat.

Why These Certifications Matter

Certified testing ensures that protective features work as intended.
An SRO rating demonstrates reliable traction on contaminated surfaces, while an HRO rating confirms durability against extreme temperature contact.
Together, they define a boot built for modern industrial conditions.

For tradespeople who face oil, moisture, or heat throughout a shift, MooseLog Timber provides protection that has been measured and documented by an independent laboratory.

Summary of Certifications

ASTM F2913-24 and related heat-resistance tests define the safety expectations for modern work footwear. Through independent testing at Intertek, MooseLog Timber proved its traction and heat durability, achieving both SRO and HRO certifications. These results confirm that Timber’s SafeTread™ outsole delivers dependable grip and protection on slick or hot surfaces, backed by measurable laboratory data.

Want to try it for yourself? Explore MooseLog Timber Work Boots.

Composite Toe | Dyna-Flex® Plate | Intertek SRO & HRO Certified | CSA & ASTM Compliant