Weight and frequency effect on spinal loading in a bricklaying task

Looze, M.P. de; Visser, Bart; Houting, I.; Rooy, M.A.G. van; Dieën, Jaap H. van; Dieen, J.H. van; Toussaint, Huub M.

doi:10.1016/0021-9290(96)84538-6

Cited by 32 publications

(15 citation statements)

References 28 publications

(26 reference statements)

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“…In the energetic demands and biomechanical demands categories, seven studies evaluated the effects of interventions on the studied work demand. Four studies examined the effect of block weight [de Looze et al, 1996;Naqvi et al, 2000;Anton et al, 2005;van der Molen et al, 2007a] and three studied the effect of raised bricklaying compared to conventional bricklaying [Vink et al, 2002;van der Molen et al, 2004;Luijsterburg et al, 2005]. Other authors studied differences between different types of bricklayers (according to, for example, the type of building the bricklayer is working on) [Fleischer, 2002;Fleischer and Becker, 2002;Hartmann and Fleischer, 2005] (Table III).…”

Section: Physical Demandsmentioning

confidence: 94%

“…Compression forces up to nearly 6 kN were calculated [Naqvi et al, 2000]. Work with lighter bricks and blocks (less then 5 kg) resulted in maximal peak compressive forces of approximately 3.5 kN [de Looze et al, 1996]. van der Molen et al [2007a] did not find an effect of lower block weight (11 kg compared to 14 and 16 kg) on cumulative spinal load during a full working day, nor on the energetic demand.…”

Section: Biomechanical Demands and Loadmentioning

confidence: 99%

“…The load on the lower back resulting from the handling of bricks and blocks was studied in seven studies, of which three used the peak compression force on L5/S1 as the outcome measure for the load on the lower back during brickor blocklaying [de Looze et al, 1996;Naqvi et al, 2000]. Other outcome measures that were used were: cumulative spinal load, expressed as the energy stored in the lumbar spine [van der Molen et al, 2007a], the duration of a certain intensity of compression forces [Hartmann and Fleischer, 2005], perceived discomfort of the lower back , mean compression forces on L5/S1 [Fleischer, 2002;Vink et al, 2002], stature loss [de Looze et al, 1996], and time-integrated compression [de Looze et al, 1996].…”

Section: Biomechanical Demands and Loadmentioning

confidence: 99%

“…Other outcome measures that were used were: cumulative spinal load, expressed as the energy stored in the lumbar spine [van der Molen et al, 2007a], the duration of a certain intensity of compression forces [Hartmann and Fleischer, 2005], perceived discomfort of the lower back , mean compression forces on L5/S1 [Fleischer, 2002;Vink et al, 2002], stature loss [de Looze et al, 1996], and time-integrated compression [de Looze et al, 1996]. An increase of the weight handled (up to 20 kg) and decrease of the height at which the block is handled, led to a statistically significantly higher peak L5/S1-compression forces [de Looze et al, 1996;Naqvi et al, 2000]. Compression forces up to nearly 6 kN were calculated [Naqvi et al, 2000].…”

Section: Biomechanical Demands and Loadmentioning

confidence: 99%

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Occupational demands and health effects for bricklayers and construction supervisors: A systematic review

et al. 2010

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Section: Physical Demandsmentioning

confidence: 94%

Section: Biomechanical Demands and Loadmentioning

confidence: 99%

Section: Biomechanical Demands and Loadmentioning

confidence: 99%

Section: Biomechanical Demands and Loadmentioning

confidence: 99%

See 2 more Smart Citations

Occupational demands and health effects for bricklayers and construction supervisors: A systematic review

et al. 2010

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“…Positioned between the place in which the bricks are set out and the wall that is being built, bricklayers lay between 800 and 1000 bricks each workday. A bricklayer must therefore frequently bend and rotate at the trunk, and this movement can be regarded as the main physical workload problem (2,3). A study by Jäger and his colleagues (4) showed that lumbar load during bricklaying (as indicated by the moment of force and the force at the lumbosacral disc) was unacceptably heavy when bricks were stacked at a height between 0 and 20 inches (0-50.8 cm) from the floor (4).…”

mentioning

confidence: 99%

A new bricklayers’ method for use in the construction industry

Luijsterburg

Bongers²,

Vroome³

2005

Scand J Work Environ Health

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Objectives The aim of this study was to investigate the effect of raised bricklaying on physical workload, reported musculoskeletal disorders, sickness absence, and job satisfaction.Methods A controlled intervention study with a follow-up period of 10 months was performed among 202 bricklayers from 25 construction companies. ResultsThe introduction of devices for raised bricklaying decreased the physical load on the lower back and, to a less extent, on the shoulders and upper extremities. Although raised bricklaying had no effect on the number of lifts, decreases in trunk bending lowered the biomechanical moment. The results showed no decrease in reported musculoskeletal symptoms as a result of the adoption of raised bricklaying. Irrespective of the reason(s), the percentage of bricklayers in the intervention group reporting sickness absence was significantly lower than the same percentage in the control group. The results also showed that, in general, the bricklayers in this study were very satisfied with the use of devices for raised bricklaying.Conclusions Controlled intervention studies on ergonomic improvements are rare. This study shows that the introduction of an ergonomic improvement in the construction industry may reduce physical load and the incidence of sickness absence.

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Weight and frequency effect on spinal loading in a bricklaying task

Cited by 32 publications

References 28 publications

Occupational demands and health effects for bricklayers and construction supervisors: A systematic review

Occupational demands and health effects for bricklayers and construction supervisors: A systematic review

A new bricklayers’ method for use in the construction industry

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