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Heat stress in forestry work

Staal Wästerlund, Dianne (2001). Heat stress in forestry work. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae. Silvestria, 1401-6230 ; 213
ISBN 91-576-6097-2
[Doctoral thesis]

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Abstract

An intrinsic characteristic of forestry work is that it is an outdoor activity, exposing its workers to the prevailing climate conditions. For a large majority of forest workers this implies being exposed to warm conditions while performing physically strenuous work. The overall aim of the thesis was to study effects of heat stress on the health and productivity of forest workers using manual working methods. Studies were made to evaluate the ISO heat stress measurement methods in forestry and the effects of dehydration on the health and productivity of forest workers in manual thinning. The studies were conducted in North East Zimbabwe in September-October 1996. Three metabolic rate assessment methods of ISO 8996 were compared. Large variations between the assessments were found depending on the method chosen. Differences between the ISO heat stress indices in heat stress risk assessment were found as well as unacceptable variations in the assessment of allowable exposure times with ISO 7933. It seems therefore questionable that today's standard methods are able to guide manager of forest operations in reliable heat stress risk management. The consumption of a fluid level assuring full hydration resulted in a significant lower percentage of heart rate reserve used, as well as a considerable reduction of time consumption when compared to consumption of a fluid level leading to mild dehydration. It was found that during harvesting, the responses of the forest workers on the fluid consumption levels were affected by their physical condition as well as their work manner and that changes in work manner had occurred between the fluid consumption levels for some workers. Moreover an accumulating effect of inadequate fluid consumption over days was found on the time consumption. As these results were obtained in mildly warm climate conditions, it is recommended to extend ILO's recommendation to drink at least 5 litres of water per work day during heavy forestry work also to temperate climate condition

Authors/Creators:Staal Wästerlund, Dianne
Title:Heat stress in forestry work
Year of publishing :January 2001
Volume:213
Number of Pages:22
Papers/manuscripts:
NumberReferences
ALLI. Staal Wästerlund, D. 1998. A review of heat stress research with application to forestry. Applied Ergonomics, 29(3):179-183. II. Staal Wästerlund, D. & Chaseling, J. 2001. Physiological and labour-productive effects of fluid consumption during forestry work. (Submitted manuscript). III. Staal Wästerlund, D. 2001. Evaluation of methods for estimating the metabolic rate according to ISO 8996 in forestry work. (Submitted manuscript). IV. Staal Wästerlund, D., Chaseling, J. & Burström, L. 2001. The effect of fluid consumption on the forest workers' performance strategy (Manuscript
Place of Publication:Umeå
ISBN for printed version:91-576-6097-2
ISSN:1401-6230
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:T Pollution > T10 Occupational diseases and hazards
Subjects:Not in use, please see Agris categories
Agrovoc terms:forest workers, physical activity, heat stress, working conditions, health, standards, dehydration
Keywords:ISO standards, physical workload, occupational health, labour productivity, dehydration, manual forestry work, working conditions
ID Code:16
Department:(S) > Institutionen för skogsskötsel
Deposited By: Staff Epsilon
Deposited On:03 May 2002 00:00
Metadata Last Modified:02 Dec 2014 10:01

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