This paper presents a quantitative description of the volume required to use common hand tools. The volume described, termed the “space envelope”, is for the tool using hand of right-handed subjects. The data were collected on six individuals who had hands at or above the 95th percentile of the military population in length and breadth. The data were obtained by use of a photographic process employing time exposures for each action. This technique provided data comparable to that provided by movie techniques but at a lower cost. The implications of the data for maintenance requirements are also discussed.
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