Dependence of Trapping Nets’ Protective Properties on Structural Layout

Brodskiy, Victor

doi:10.1007/978-3-030-37919-3_27

Cited by 3 publications

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“…Based on this, when using trapping devices with rigidly fixed brackets for various options of falling, values (a) may reach about 20 g, which is quite acceptable for falling items not causing destruction of structure and nets of device, but does not exclude possible injury to men. [5] This causes a necessity to consider second layout of the trapping device when a bracket is pivotally installed on support fixed on building structure. Net is attached to the bracket with contour rope (figure 1), with examination of rate of acceleration in case of men falling on trapping device made by such layout.…”

Section: Discussionmentioning

confidence: 99%

“…Impact action occurs from falling on surface of a trapping device the value of which depends on the rate of velocity change by end value over a particular period of time. [5] The most important objective with account to various structural layouts of trapping devices, is the selection of a structural layout ensuring minimum overloads. [6]…”

Section: Introductionmentioning

confidence: 99%

“…2. Diagram of item additional slowdown path in case of its falling on net depending on angle α0 of 3.5 m long freely installed brackets Values of curves corresponding to item points of fall on the net 1, 3, 6 -ௗ ସ ; 2, 5, 8 -; 4,7,9 -ଷ ସ ݀ Designations of net attachment height from bracket base -0.6 m ³ ³ -1.0 m • • -1.4 m Diagrams on Figure3and Figure4were made based on theoretical computations performed [5]. Let's assume that, for instance, it is necessary to evaluate acceleration of an item that hit a trapping device center with L = 3.5 m, h = 1 m, х = 0.4 rad.…”

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confidence: 99%

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Organization of safe execution of works with the use of trapping nets

Brodskiy

2021

E3S Web Conf.

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The organization of ensuring safe execution of building and assembly works when erecting and reconstructing buildings (structures) of various purposes based on the application of trapping nets to prevent industrial injuries in case of human or items falling from height is presented. Structural layout of a safety (catching) device with pivotally mounted brackets and a freely hanging net was considered. Appearing dynamic loads in case of items falling on trapping nets depending on impact acceleration were theoretically identified. It was found out that a trapping net with pivotally positioned brackets additionally reduces deceleration loads in relation to devices with rigidly fixed brackets and their use is more effective for cases of men falling with insignificant forward velocity. Bench and shop tests of trapping devices were carried out with the purpose of checking compliance of selected theoretical models, selection of developed options of designs and schematic diagrams, differentiation of reaction of capron and lavsan net materials from action of impulse loads. Test key results confirming matching of experimental data with presented theoretical models were showed. It was established that dynamic overloads depend both on a bracket position angle as well as on a place of an item falling into net, the value of pitch of deflection of net cloth made of lavsan and capron materials is almost similar and characteristics of values of their displacement under dynamic loads from a falling item are identical.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Organization of safe execution of works with the use of trapping nets

Brodskiy

2021

E3S Web Conf.

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“…Measures for ensuring the safety of works at heights for a particular facility are established in organizational and technical documentation [1,2], which recently has been increasingly recommending the use of collective protective equipment based on netting materials made of synthetic fibers when erecting residential and public multistory buildings. To determine optimal parameters and protective properties of this equipment, we carried out studies that enabled us to establish structural layouts of devices and dimensions of load-bearing brackets and nets to make sure that falling objects are caught and allowed us to identify shock absorbers' characteristics decreasing dynamic effects to safe values in case of a person's fall [3,4,5].…”

Section: Introductionmentioning

confidence: 99%

Collective Protective Equipment Using Netting Materials in Construction of Industrial Buildings

Brodskiy

2024

BIO Web Conf.

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The article presents conditions for ensuring the safe performance of construction and installation works during construction/reconstruction of industrial buildings and facilities of various purposes, based on the use of fall arrest nets, which are collective protective equipment for preventing work-related injuries in case of a person’s or an object’s potential fall from height. The article specifies the basic elements of these devices where synthetic netting materials are suggested as the most pacing factor of the required protection degree. Consideration is given to governing parameters of fall arrest safety nets that make it possible to ensure the safety of works at heights. This produced net deflection values that are acceptable for conditions under which construction is carried out, with required contour-rope tension values. The value of the maximum negative acceleration that acts on a body falling from height to the net was assessed. Herewith, the performed calculations showed, based on relatively large dimensions of the fall arrest device’s net fabric, that overloads that occur when catching fallen objects are insignificant and do not require that additional equipment be used to reduce dynamic loads.

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Reducing dynamic overloads based on using of shock-absorbers in protective equipment

Brodskiy¹

2021

Proceedings of the Scientific Conference on Railway Transport and Engineering (Rte 2021)

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Dependence of Trapping Nets’ Protective Properties on Structural Layout

Cited by 3 publications

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Organization of safe execution of works with the use of trapping nets

Organization of safe execution of works with the use of trapping nets

Collective Protective Equipment Using Netting Materials in Construction of Industrial Buildings

Reducing dynamic overloads based on using of shock-absorbers in protective equipment

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