What traction testing can contribute
Traction measurements can help characterize a surface under the conditions and method used for the test. They do not independently recreate an earlier incident or determine why a person fell. The investigation considers whether the tested condition is relevant to the reported event and identifies important differences or limitations.
NFSI B101.3 and TracScan 2.0
At HUB, we generally use the NFSI B101.3 standard for slip testing, typically using a TracScan 2.0 tribometer. Test selection and interpretation depend on the surface and circumstances. Wet dynamic coefficient of friction measurements are considered alongside the incident evidence, rather than treated as a standalone determination of causation or legal responsibility.
Method selection and documentation
HUB uses validated instrumentation and applicable test methods. The appropriate procedure depends on the surface and the technical question. A testing scope should identify relevant locations, surface conditions, records and the information needed to interpret results.
Engineering analysis beyond a test result
A useful opinion connects the measurements to the condition and incident evidence. HUB may combine testing with site documentation, records review, engineering analysis and reports or testimony within the agreed engagement.
Before an engagement
Questions from counsel
Does a traction result prove that a floor was safe or unsafe at the incident time?
No. The result describes testing under particular conditions. Its relevance to an earlier incident depends on the method, surface condition and other available evidence.
Should the surface be changed before an inspection?
Tell counsel and HUB promptly about any planned repair, cleaning, replacement or other change that could affect the evidence. Inspection and preservation arrangements must be coordinated for the particular case.
Is testing appropriate for every walkway incident?
No. HUB recommends testing only when it can meaningfully address the disputed technical issues. Geometry, lighting or an elevation change may be more relevant in some incidents.