Although safety door reversal systems are provided to protect against entrapment, they sometimes fail to perform properly, usually due to improper installation or maintenance. Two new design concepts are presented which offer improved protection from entrapment injury. Claudine P. Giebs, Ralph L. Barnett, and Peter J. Poczynok Describes the Triodyne Friction Tester, a new device for measuring the slip resistance of footwear against compliant surfaces, as opposed to other slip resistance test devices which measure slip resistance on hard surfaces. Most current designs adopt the bungee cord for rapidly securing and unfastening the load. This element is the primary source of luggage cart injuries because it produces impact hazards that strike the eye.
Various countermeasures appear throughout the family of luggage carts.
Use of the Safety Hierarchy imposes a discipline for the systematic evaluation and application of safety strategies for mitigating the impact danger. Dennis B. Brickman A summarized version of the preceding paper. Sawing off a tree limb in front of you does not conjure up the slightest portent of danger. However, this activity performed while standing on an extension ladder can and has led to the telescoping collapse of the ladder. Ralph L. Barnett Bowhunters wear a safety belt for fall protection when climbing to or hunting from a tree stand.