Shakshat Virtual Lab
INDIAN INSTITUTE OF TECHNOLOGY GUWAHATI
5. Effective work platform height, standing
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Effective work platform height, standing
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Content
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This study aims at understanding the various work surface heights relevant to normal work
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platform, table, kitchen platform, or any interactive work counters, with the reference data set in Indian population. |
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The presentation acquaints
1. To understand the common features for selecting relevant work platform heights standing posture, this may be converted to sitting purpose considering sitting elbow height.
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2. To assist practical understanding of low cost measuring technique (anthropometric rod set or board) with the help of animated experiment provided here in. |
About experiment
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Those physical human body dimensions based on elbow heights (arm hanging vertical downward at the side of the body) assists fixing various work platform heights for comfortable work, normal, upper permissible and lower respectively for inspection etc fine work and handling heavy material. This experiment gives a feeling of real experiment for preferred real
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experiment for preferred heights of horizontal work surface in standing posture. For general purposes, 50th percentile of elbow height may be considered; for writing, etc., it may be fixed at elbow height + (50 to 100 mm), and for minute attention it may go up to 200 mm; for heavy manual material handling it may go down to 200mm from the elbow height.
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Procedure
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In the case of dynamic body dimensional measurements, as the body functional contexts vary, comfortable work postures should be maintained and measurements of body parts in
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such positions should be taken with extension and flexing movements so that various reach values in different positions are normally taken care of. |
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Measuring procedures
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Basic anthropometric data is the elbow height from the floor or against a reference surface like for chair seating it may be seat surface. The same elbow point may be taken for standing, sitting posture on a chair and other posture such as sitting on floor with cross-leg and squatting. Data may be collected from selected
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subjects in a particular population group. Both direct and indirect measurement may be considered separately or taken both simultaneously, for considering the following measurement. Analysis of photographic records of an activity against a suitable grid and anthropometric rod set also can be used.
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Direct and indirect body measuring
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Direct body measuring instruments mostly used are: A common set of anthropometric instruments and anthropometric board with grid marks. Create a physical simulation where a horizontal platform can be adjusted in various heights in respect to the subject where he feels comfortable to
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Indirect measurements may be taken through photographic methods, using still photography and filming the above mentioned experiments with the subject against a marked grid background, or superimposition of a grid on the photographed human body. To guard against parallax errors - problems where the actual dimensions may change care must be taken. For dynamic measurements, subjects are asked to perform the intended tasks in actual and/or simulate situations and the relevant measurements are taken. Subjects may leave some marks denoting the limits to which they can stretch their limbs in a comfortable position. Different types of grids may also be developed that suits the specific working situation, if the measurements are taken in the real working condition.
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Step by step procedure
Measuring dimensions: Technique |
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The study can be done with the photographic record of a real work situation or in a laboratory with simulated work condition where the work platform height can be adjusted according to working comfort with three different types of activities, normal, close to eye for work demanding close inspection and lower limit for working with relatively heavy load.
The measuring methods as demonstrated in the video and illustrations presented herein may be
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followed with the relevant experimental set up using (A) anthropometer set ((B) anthropometric board and other relevant devices specifically developed for suitability to measure respective measurements.
Data treatments as relevant calculations are to be followed. Data usage- principles and thumb rules are to be maintained. |
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