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1
Content available The Effect of the Use of Full Body Harnesses on Their Protective Properties
Baszczyński K., Jachowicz M.
International Journal of Occupational Safety and Ergonomics
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2009
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Vol. 15, No. 4
435--446
EN
A full body harness is a component of personal systems protecting against falls from a height. To ensure users’ safety, the harness must retain its protective properties during its whole service period. All the elements of a harness (webbings, threads, metal buckles, etc.) are exposed to destructive factors. Harnesses stored and used for a few years were tested. The paper discusses the most frequent types of damage and their effect on the essential resistance parameters. The effect of atmospheric conditions, sunlight, mechanical damage and dust on the parameters of webbings was tested. Conclusions on the main causes of the loss of the protective properties of harnesses are drawn; periodic checks of the physical conditions and guidelines for estimating acceptable service time are recommended.
2
Content available Corrosion of Retractable Type Fall Arresters
Baszczyński K., Jachowicz M.
International Journal of Occupational Safety and Ergonomics
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2009
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Vol. 15, No. 3
265--275
EN
Retractable type fall arresters constitute a most effective group of components used in personal protection systems protecting against falls from a height. They are designed primarily for outdoor use, which results in exposure to atmospheric factors associated with risk of corrosion of metal elements. This paper presents the results of a study, in which retractable type fall arresters were exposed to a simulated corrosive environment, a neutral salt spray. It discusses the development of corrosion processes depending on the duration of exposure to corrosive conditions. Tests demonstrated that corrosion of elements decreased their strength and impaired the functioning of mobile parts. The article presents methods of testing the correct functioning of devices, necessary for assessing their resistance to corrosion, which have been developed for this purpose. It also analyzes the correlation between corrosion-related damage of retractable type fall arresters and potential hazards for their users.
3
Content available Dynamic Strength Tests for Low Elongation Lanyards
Baszczyński K.
International Journal of Occupational Safety and Ergonomics
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2007
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Vol. 13, No. 1
39-48
EN
Lanyards are still important and common components of personal systems protecting against falls from a height. Experience with dynamic strength tests of lanyards indicates that test methods based on EN and ISO standards do not make objective assessment possible. This paper presents the results of theoretical and laboratory investigations of the performance of adjustable lanyards during fall arrest. The obtained results indicate that methods of testing and assessment based on those standards demonstrate considerable shortcomings when applied to low elongation lanyards. The assumptions for improved requirements and test methods of lanyards made of, e.g., steel wire and aramid ropes are also presented.
4
Content available The Influence of Anchor Devices on the Performance of Retractable Type Fall Arresters Protecting Against Falls From a Height
Baszczyński K.
International Journal of Occupational Safety and Ergonomics
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2006
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Vol. 12, No. 3
307--318
EN
Retractable type fall arresters are part of the equipment used for protecting people against falls from a height. They are an intermediate part between full body harness worn by a man and the structural anchor at the worksite. The most important task of retractable type fall arresters is to arrest people’s falls and to reduce their harmful consequences. Information received from users as well as laboratories testing protective equipment indicates that the performance of such equipment is incorrect under specific conditions. The paper is concerned with an analysis of the conditions in which retractable type fall arresters demonstrate intermittent performance and with an explanation of that phenomenon. The results of tests investigating anchor devices and the performance of retractable type fall arresters are presented. External and internal factors contributing to intermittent performance have been determined and guidelines for safer use of these devices have been developed.
5
Content available Locking of Retractable Type Fall Arresters - Test Method and Stand
Baszczyński K.
International Journal of Occupational Safety and Ergonomics
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2005
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Vol. 11, No. 2
191--202
EN
Retractable type fall arresters are very effective personal equipment protecting against falls from a height. These devices are used under different atmospheric conditions and in the presence of various types of industrial pollution. For this reason appropriate locking after conditioning simulating extreme conditions of a worksite is one of the essential characteristics of retractable type fall arresters. This article presents the requirements for locking of the devices. A previously used locking test method and its disadvantages are discussed. The article suggests an improved test method and test equipment. Measurement of the test mass acceleration is the most important improvement introduced into the test method. The article shows laboratory tests used to verify the method, which turned out to be a valuable source of information concerning the performance of retractable type fall arresters.
6
Content available Test Method for Retractable Type Fall Arresters Designed for Horizontal Use
Baszczyński K., Zrobek Z
International Journal of Occupational Safety and Ergonomics
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2003
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Vol. 9, No. 3
313--331
EN
Retractable type fall arresters are designed to protect against falls from a height of people who need freedom of vertical movement. The practice of fall protection shows that the devices are also used to protect people who work on flat roofs. This application creates quite different operating conditions for the devices. In some situations those conditions can be dangerous for users. The article presents a theoretical analysis of phenomena occurring during a fall arrest with retractable type fall arresters arranged horizontally. The analysis was verified with laboratory tests. The article presents a proposal for the construction of a test stand and a test method for estimating retractable type fall arresters intended for horizontal use.
7
Content available Dynamic Performance of Horizontal Flexible Anchor Lines During Fall Arrest - A Numerical Method of Simulation
Baszczyński K., Zrobek Z
International Journal of Occupational Safety and Ergonomics
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2000
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Vol. 6, No. 4
521--534
EN
Designing fall arrest systems, which contain horizontal flexible anchor lines is an important technical problem related to the safety of people who work at a height and need horizontal freedom of movement. The article presents a numerical simulation of the dynamic performance of horizontal flexible anchor lines during fall arrest. The model of a 2-component system – a horizontal flexible anchor line and a falling rigid mass, described with a second order non-linear differential equation - is the main element of this method. This method of simulation is realised by a computer program, which allows obtaining the most important data characterising a fall arrest. The article shows laboratory tests used for the verification of this method, which turned out to be a valuable source of information and which can be used for designing fall arrest systems.
8
Content available remote Nowe normy PN-EN: Sprzęt chroniący przed upadkiem
Baszczyński K., Karlikowski M., Zrobek Z
Bezpieczeństwo Pracy : nauka i praktyka
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1999
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nr 10
2-5
9
Content available remote Stalowe poziome liny zaczepowe
Baszczyński K., Zrobek Z
Bezpieczeństwo Pracy : nauka i praktyka
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1998
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nr 6
18-22
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