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The effects of humidity and temperature on the lanyards performance

The lanyard is a component of personal fall protection systems which is connecting the body holding device at a reliable anchorage point. To ensure user’s safety, the lanyard must retain its protective properties during the whole service period. Because of the diversity of working environments that) the lanyards are used in, they tend to be often more affected by risk factors than any other component of the system. This study discusses the most frequent types of risk factors (such as humidity and heat) and their effect on the breaking strength of different types of lanyards. The results of the study show that each additional risk factor significantly decreases the mechanical strength of the lanyards which can lead to the creation of unfavorable conditions in the event of a fall. Conclusions on the main causes of the loss of the protective properties of lanyards are drawn and on the need for evaluation criterion according to which should be decided whether to continue or not the use of the lanyards.