ASTM F2508

ENGLISH XL VIT Standard and Sequencer Super ILS Results for ASTM F2508-23 per ASTM F3539-24

Super ILS testing was conducted on April 26, 2024 using the English XL VIT with Sequencer at the SEA Limited offices located at 795 Cromwell Park Dr #N, Glen Bumie, MD 21061.

English XL VIT with Sequencer F3539 Report for F2508-23

Sample English XL VIT with Sequencer F2508-23 Validation Report 

Super ILS testing was conducted on April 27, 2024 using the English XL VIT (Standard) at the SEA Limited offices located at 795 Cromwell Park Dr #N, Glen Bumie, MD 21061.

English XL VIT (Standard) F3539 Report for F2508-23

Sample English XL VIT (Standard) F2508-23 Validation Report 

The requisite (6-inch) tiles for F2508-23 can be purchased through Excel Tribometers, LLC or directly from ASTM at the following links:

Tile E - ADJF2508AWP6   https://store.astm.org/adjf2508awp6.html

Tile F - ADJF2508DAT6    https://store.astm.org/adjf2508dat6.html

Tile G - ADJF2508CRO6   https://store.astm.org/adjf2508cro6.html

The ASTM F2508-23 standard is based upon two scientific studies detailed in the following two papers:

- Human Slip Assessment of Candidate Reference Surfaces for Walkway Tribometer Validation: An Update to Standard ASTM F2508  (Link to Purchase)

- Quantifying the uncertainty in tribometer measurements on walkway surfaces (Link to Purchase)

 

ENGLISH XL VIT VALIDATED AS ASTM F2508 COMPLIANT (F2508-11, F2508-16)

The world of walkway safety and meaningful tribometry has been in a state of flux since the ASTM Standard Practices were withdrawn because they were based on proprietary devices.  Even though those standards were merely operating instructions for the devices, the adversaries of accurate measurement of slip resistance took advantage of the void to represent that there was no approved, meaningful tribometer.  The ASTM Standard Practices were not approvals or endorsements of the devices, anyhow.  Also in that void, agencies and methodologies, which would not have flourished in the light of meaningful science, have been allowed to survive.

The ASTM F2508-16 Standard Practice for Validation and Calibration of Walkway Tribometers Using Reference Surfaces was approved March 15, 2011, and then immediately published.

EXCEL TRIBOMETERS, LLC, as the patent owner, manufacturer and sole authorized supplier of the English XL Variable Incidence/Articulated Strut Tribometer (both the base XL VIT and the XL VIT with sequencer) performed all requisite testing that demonstrates full performance compliance of both models of the ENGLISH XL VIT with the requirements of F2508.

We have been Validating individual instruments since 2014, and representative reports are below:

English XL Base-Model Validation Report 1

English XL Base-Model Validation Report 2

English XL with Sequencer Validation Report 1

English XL with Sequencer Validation Report 2

F2508 Certification - English XL VIT on F2508 Reference Surface ILS Data

English XL ILS Jan 2015

 

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