The Dennington Safety Harness  PowerQuick, Inc. is pleased to recommend the Dennington Safety Harness for use with the PowerQuick Ascender, as well as all other climbing operations. The patented Dennington Harness is the first major harness technology innovation in 53 years and the first product on the market to provide full worker protection. It features:
§ A bungee-type shock absorption system integrated into the design, § A seat strap to provide comfort for long jobs and reduce groin discomfort and injury, and § Keeps the worker upright in a fall to prevent back and neck injury. § The following excerpts illustrate some of the limitations of current harnesses on the market. Enhancing the harness fit to worker population — NIOSH “Falls from height are the leading cause of death in the construction industry; in 2004, 433 American construction workers died due to falls-from-height incidents. In addition, more than 20,950 construction workers were disabled in work-related falls from heights in the same year. Fall-arrest harnesses provide the last line of defense to the 6.3 million construction workers in areas where fall-from-height hazards cannot be completely eliminated. Yet, comparatively little is known about the fit of these important safety devices for construction workers. The NIOSH Harness Research team has developed scientific theories to quantify human torso shape and size. Using these theories, the research team has further derived and tested practical harness design criteria to advance our knowledge about reducing the risk of injury that results from poor harness-user interface, improper size selection, or the failure to don the harness properly. “  The NIOSH study focuses on human torso shape and size as it relates to harness fit and safety. Dennington has taken the concept a step farther. Independent research shows that body weight has greatly impacts the amount of force subjected to the body during a fall. The Dennington harness reflects this fact and actually sizes the harness based on the weight of the wearer. This directly relates the size of the bungee used in the shock absorption system. As a result ha heavy man has as much protection as a lightweight woman in the event of shock loading.
Using Fall Arrest Systems Safely —29 CFR 1926 Subpart M, Fall protection. OSHA Standard “Ensure that personal fall arrest systems will, when stopping a fall: Limit maximum arresting force to 1,800 pounds. Be rigged such that an employee can neither free-fall more than 6 feet nor contact any lower level. Bring an employee to a complete stop and limit maximum deceleration distance to 3˝ feet. Have sufficient strength to withstand twice the potential impact energy of a worker free-falling a distance of 6 feet, or the free fall distance permitted by the system, whichever is less. “
 The Dennington Harness exceeds these standards by keeping the fall to a 6-ft distance. Until recently, industry has had no alternative to the Elongation Deceleration Device (EDD) Climbers typically use a shock absorber system that consists of woven webbing that is sewn together. When a fall occurs the stitching tears reducing impact forces to around 900lbf (4kN).
Even at this rate, the shock load is sufficient to cause permanent groin, back, and neck injury. Additionally, most lanyard systems allow the fall distance to exceed the required 6 feet. This can allow workers to strike objects below them whether it be a tree branch, scaffold, lower story of a pipe or other item. I can also allow a person to slam into a structure during the fall. The Dennington Harness’ 3-point shock absorption system is designed so that even if a person falls head first, the body is gently positioned in an upright position minimizing potential injury. While all harnesses are designed to keep the worker from hitting the ground... the Dennington was also designed to alleviate injuries when a fall occurs. If you look at the other harnesses on the market today, along with a review of standards regarding fall protection, you will see that this harness meets and far exceeds US and international standards providing a higher level of safety than any other harness on the market today. For more information email us at sales@powerquickinc.com | 
