Donald Meserlian PE is a recognized expert in the measurement of the slip-resistance of both walkways and footwear, under both dry and wet conditions. He has authored 16 papers on the subject and presented a paper at the Ergonomics Association’s International Conference in Tamper, Finland, 1997. This major paper, “A Proposed International Specification/Test Method for slip-Resistant Walkways and Footwear, In the Field and Laboratory as Measured by A Drag-Type Friction Tester”, was the basis for formation of the Voices of Safety International (VOSI) standards writing organization.

VOSI is an international standards writing organization that, in addition to writing slip & fall standards, has added standards for health, safety and the environment.

VOSI is recognized by the National Institute of Standards and Technology (NIST), and its slip and fall standards are being used worldwide (see www.voicesofsafety.com…”About VOSI”…”Slip/Fall Standards”

The Technical Products Co., Model 80 Floor & Footwear Friction Tester is used for all laboratory measurements; see www.technicalproductsco.com …”Model 80”



Attorneys who litigate slip & fall cases typically will only measure the slip-resistance of the walkway surface. Slipping involves the properties of both the walkway and the footwear.

The Flooring & Footwear Test Laboratory is offering a unique service to test both walkway surfaces and the shoes of plaintiffs involved in slip & fall accidents.



  • See VOSI Standard V41.21 for "Slip Resistant Walkways, in the Field & Laboratory, as Measured by a Drag Type Friction Tester" 

  • See VOSI Standard V41.22 for "Slip Resistant Footwear, in the Field & Laboratory, as Measured by a Drag Type Friction Tester"

  • See VOSI Standard V41.23E for “Slip Resistant Walkways & Swimming Pool Decks”

VOSI standards have been proven to correlate with actual slip & fall accident rate. See SCOF Testing - FAIRFIELD NJ - KIDDY POOL (2002 & 2003).

Contact: Donald Meserlian, P.E., N. Caldwell, N.J. (973) 228-2258

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Created: 2010-02-24