Preliminary results of hand arm vibration (HAV) exposures of chipping hammer operators in tropical weather: Analysis of exposures and protective gloves

Silva, G.H.M.J. Subashi De; Wijewardana, T.R.S.T.

doi:10.1016/j.ergon.2021.103197

Cited by 9 publications

(12 citation statements)

References 23 publications

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“…The dominant value of vibration in one direction appears that largely depends on the type of operation and tool used. 45 Consistent with the findings of previous studies, the vertical demolition axis results were remarkably high at both handling of tools; however, the value from the horizontal axis (x) was comparable to the vertical direction. 14,15,40 This is a fair circumstance for the operator to hold the accelerometer while destroying, and in reality, the reason for the high values in the horizontal axis is because the operator’s hand angle changed while directing the tool, altering the accelerometer’s vibration input axis.…”

Section: Discussionsupporting

confidence: 91%

“…Most important reasons for the difference between the results of this research and this study can be found for reasons such as providing results for trigger time, differences in hardness and density of concrete surfaces, new or used tools or bits during demolition, etc. 2,4,45,46 The results of the vibration measured in this field study seem more intense than the results of similar studies done robotically or in laboratory environments in this group of electric tools.…”

Section: Discussioncontrasting

confidence: 50%

“…7 The overall mean of 16.65 m/s 2 (14.66-20.04) in this study can be compared to 15.09 m/s 2 reported for five electric and pneumatic demolition hammers in real conditions, a mean of 12.78 m/s 2 for pneumatic hammers in the laboratory environment, and an average of 19 m/s 2 in 27 and 40 kg heavy demolition hammers under actual operating conditions. 4,15,16 In the study of De Silva and Wijewardana, 45 the hand-arm vibration exposure values for the x, y, and z axes was reported to be 23.3, 15.2, and 18.1 m/s 2 , respectively.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Handle transmitted vibration of electrical demolition hammers: Frequency and magnitude investigation in field measurements from different bits

Monazzam

Khavanin

Sarrafzadeh

et al. 2023

Journal of Low Frequency Noise, Vibration and Active Control

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Using a demolition hammer among the power tools is one of the most challenging job tasks for the operators of these tools, which exposes users to high levels of hand-transmitted vibrations. The focus of this study was for finding the vibration levels transmitted to the handles, the frequency content transmitted by the tool, and the effect of using insert bits with different tip shapes and lengths using conventional demolition hammers under controlled operating conditions on typical concrete slabs in the field. Three demolition hammers (weighing between 14 and 27 kg) with two handles installed were subjected to simultaneous measurements based on ISO 5349 as the field measurement technique. The findings demonstrated that even while the vertical axis dominated, several samples also produced equivalent x-axis results. The impact energy of the tools employed and the transmitted vibration to the tool handles are not significantly correlated with each other. All mean values were higher in the slabs with a thickness of 15 than those with 10 cm. The mean values of the total results for the two forms of flat and point tip inserted bits were 16.85 and 15.86 m/s2, respectively, and in the samples with the same operating factors, this difference was more than 3 m/s2 ( p < .03). The a wrms ( frequency-weighted root mean square acceleration) produced at tools using 60 cm bits were more than those with a length of 40 cm, both for the average of the total results and the average of the results of each hammer. The difference between the average bit length groups over samples with the same factors reached 4.65 m/s2 ( p = .02). Frequency analysis for the flat and point insert bits with 60 cm length in the concrete slabs with a thickness of 15 cm showed that the dominant frequencies detected at lower frequencies for point bits. This difference is almost two frequency parts of 1/3 octave band.

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Section: Discussionsupporting

confidence: 91%

Section: Discussioncontrasting

confidence: 50%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Handle transmitted vibration of electrical demolition hammers: Frequency and magnitude investigation in field measurements from different bits

Monazzam

Khavanin

Sarrafzadeh

et al. 2023

Journal of Low Frequency Noise, Vibration and Active Control

View full text Add to dashboard Cite

show abstract

“…Therefore, the protection can be overestimated [11,12,14]. In other cases, gloves protection is higher in the real field rather than in the laboratory tests [15][16][17], due to the different experiment conditions, sometimes even when the transfer function is used [15,18].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Antivibration Gloves When Used with a Light Electric Hammer. Differences Among Different Methods of Measurements

Antonucci¹,

Coltrinari²,

Lippiello³

2023

IJCMEM

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The capability of antivibration (AV) gloves to reduce the vibration's transmissibility is not always proven, especially with percussive tools. Additionally, laboratory test results are sometimes dissimilar from the real field's one. The present paper investigates the properties of three different types of gloves air bubbles, gel, neoprene -specifically designed for vibration reduction, and of an ordinary working leather glove, during their use with a light (3 kg) electric hammer, in a real field, while chiseling a limestone block. Outcomes reveal that AV gloves could provide benefits in reducing vibration when used with that type of tool, even though the protection is different to the one determined in laboratory test according to the ISO 10819 Standard. The statistical analysis does not reveal differences for the triaxial transmissibility in the AV gloves in the range (6.3-1250 Hz), showing an average overall reduction of 26%, calculated with the corrected method specified by the ISO 10819:2013 Standard. The leather glove provides a reduction of around 8%. Similarly, statistical differences are not found with reference to transmissibility through the three main axes for the same type of glove, both in air and neoprene gloves. On the contrary, gel and leather gloves differ in transmissibility along the axes, showing a better reduction on the x-and z-axes, respectively. The transmissibility estimated with the direct method shows an average decrement of around 10% when compared to that resulting from the corrected one. The air glove provides the best triaxial transmissibility reduction at middle frequencies (25-200 Hz), while at high frequencies (200-1250 Hz), the best reduction is provided by the neoprene glove. At the peak percussion frequency of 63 Hz, measured on this tool, all the AV gloves provide some vibration attenuation -an average of 27% -with no statistical differences, while leather gloves show a little transmissibility increment (1.02). Although the accelerometers used for the study are positioned as closely as possible, there are still differences between the acceleration measured on the bare-hand adaptor and the one directly on the handle, highlighting the importance of the corrected method application for better evaluating the gloves' transmissibility.

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“…Such gloves are not considered to protect the hands against the hand-arm vibration. Anti-vibration gloves can significantly reduce the risk of HAV but have some limitations 20) . It is possible to minimize hand arm vibration (HAV) with economic interventions 21) .…”

Section: Introductionmentioning

confidence: 99%

An Investigation of Ergonomic Risk for Work-Related Musculoskeletal Disorders with Hand-Held Drilling

Sharma¹,

Sain²,

Meena³

et al. 2023

Evergreen

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Woodworkers commonly perform operations like sawing, chipping, planning, shaping, nailing and drilling in daily work environment. This study focused the consequences of exposure to hand arm vibration among woodworkers working with handheld drill machine. Subjects' hand grip strength was measured by a digital hand grip dynamometer. The vibration generated by a handheld drill machine was the main concern and hence the same handheld drill machine was used during this study. The results showed that workers exposed to hand arm vibration had higher prevalence of musculoskeletal disorders. Future studies should include other contributing factors also like ergonomic interventions and workers' postures.

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Preliminary results of hand arm vibration (HAV) exposures of chipping hammer operators in tropical weather: Analysis of exposures and protective gloves

Cited by 9 publications

References 23 publications

Handle transmitted vibration of electrical demolition hammers: Frequency and magnitude investigation in field measurements from different bits

Handle transmitted vibration of electrical demolition hammers: Frequency and magnitude investigation in field measurements from different bits

Effectiveness of Antivibration Gloves When Used with a Light Electric Hammer. Differences Among Different Methods of Measurements

An Investigation of Ergonomic Risk for Work-Related Musculoskeletal Disorders with Hand-Held Drilling

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