Chapter 14. Anthropometry and Biomechanics - FAA

HFDS 2003 (amended Oct 2009)Chapter 14 Anthropometry and biomechanics14.4 ReachReach limits are clearly dependent on the task, motion, andfunction to be accomplished by the reach action. Limited reachdata on standard anthropometric positions are available insources of static and dynamic anthropometric data. Reachenvelopes need to be constructed for actual working positionsand for explicit design purposes. Reach envelopes may berelated to a body reference point (such as the shoulder joint), to ameasurement apparatus point, or to a design point (such as a seatreference point). This section provides design criteria and rulesfor using reach data and constructing reach envelopes. [Source:NASA-STD-3000A, 1989]• 14.4.1 Task and body position effects. The following taskconsiderations shall be taken into account in order to establishreference points and to obtain the reach information needed toconstruct a reach envelope:a. the nature and requirements of the task to be performed(see also Paragraphs 14.3.1.2 and 14.4.3 for the nature ofthe reach task),b. body position while reaching (standing, seated, seat backand seat pan angles, and others),c. whole body movement capabilities and restraints (seatbelts, harnesses, necessary and permitted movements ofthe torso),d. design purposes such as: to accommodate the appropriateportion of the population, to enhance task performance, orto avoid striking reachable surfaces, ande. equipment locations that interfere with reach, vision orintercommunications. [Source: NASA-STD-3000A, 1989]14-35