Professional, Experienced, Highly Qualified, Reputable


Expert Witness Services

William Marletta Safety Consultants, Inc. has been retained in thousands of safety related accident investigations, including lawsuits and insurance claims.  Dr. Marletta’s forensic workload is split between both plaintiff and defense oriented investigations.  Dr. Marletta’s safety experience and education, qualifies him as a valuable consultant to provide expert opinions. Dr. Marletta has a diversified safety background and provides site inspections, research, reports and testimony where technical answers are necessary for resolution of safety issues.  While Dr. Marletta's practice is heavily focused on trip, slip and fall investigation, he is also heavily specialized and experienced in Construction Safety and the Labor Law.      

Safety Expert Specialties

  • Slips, Trips and Falls
  • Slip Resistance Testing with English XL and BOT 3000E Test Methods
  • Abrupt Surface Transitions
  • Contrast Evaluation
  • Roughness Testing
  • Retail hazards
  • Stairs and Handrails
  • Ramps
  • Walkways
  • Walking Surfaces
  • Floor Mats and Runners
  • General and Commercial Construction
  • Construction and Industry Fall Protection
  • OSHA Compliance
  • Ladders
  • Scaffolding
  • Machine Guarding
  • Door Closers
  • Escalator and Elevator Trip Hazards
  • Powered Industrial Trucks
  • Excavation
  • Illumination
  • Parking Lots
  • Playgrounds
  • Sharp Edges
  • Illumination Measurement
  • Sharp Edge/Sharp Point Testing
  • Other

Safety Consulting Services

  William Marletta Safety Consultants offers safety consulting services to manufacturers, insurance, commercial and governmental industries.  William Marletta Safety Consultants are experienced in the safety testing of products and are active in safety research and national safety standard development. WMSC has served as consultant to the United States Department of Labor providing research and standards development assistance to OSHA for slip resistance standards in the construction industry.  Dr. Marletta was consulted to perform research for the NFPA and developed a test standard which rules out the use of diamond plate steel in all Fire Trucks in America.  Our consulting and forensic experience includes review and analysis of products and building design with regard to safety, accident analysis, safety training and other aspects of safety program development.  
  • Product Testing and Evaluation
  • Slip Resistance Testing
  • Slip Resistance Product Development
  • OSHA Compliance
  • Safety Audits and Evaluation
  • Safety Program Development
  • Mock OSHA Surveys/Inspections


  Slip Resistance Testing It is well known that same level slips and falls can produce serious injuries. A major problem with the use of tribometers is that different types of tribometers provide varying COF values when the tribometers are used to meter identical surfaces.  The question then becomes twofold.  What is the value of COF that indicates a safe walking surface and, which of the multitude of different values produced by different tribometers is the "correct" value? Dr. Marletta owns, operates and has evaluated flooring with many types of tribometers.  The BOT 3000E has now been adopted by the Ceramic Tile industry in ANSI A137.1 and A326.3 in setting a criteria level for slip resistance of 0.42 COF for acceptance for use on ceramic tile (and now other hard floor surfaces).  He is equipped and trained to use all of them.  In addition, Dr. Marletta is equipped to perform roughness testing.   Illumination Able bodied persons must be able to see a hazard or dangerous condition in order to be to expect to avoid it.  Sufficient illumination is usually needed in order to detect and avoid a hazard. It is important that illumination be measured for stairways, parking lots, roadways and other commercial, industrial and municipal areas where proper and adequate lighting is a necessary factor. As a member of Illuminating Engineering Society, combined with years of field experience, Dr. Marletta can assess the available illumination rand compare them to the applicable requirements and standards for proper lighting. Roughness Testing Surface roughness measurements are taken in support of tribometer  testing to provide additional data of how the surface handles contaminants. The Surtonic Roughness Meter is calibrated and tested in multiple areas.  The test helps to determine tractional areas and surface texture.