A subjective survey was performed on a 200m high chimney construction project in order to analyse worker fatigue. Workers were given a questionaire and levels of cathecjolamin in urine was sampled, heart rate after work was measured and environmental factors were examined. Fatigue was observed in relation to the height of the work, the work load and other associated factors. This paper presents the symptoms of worker fatigue and shows that the chimney construction system appears to have an effect on the group organization of workers, the learning effect and the reduction of work-load.
