“…This approach derives from a book on biomechanics (Tichauer, 1978), articles on posture (Ayoub, 1973;Floyd & Ward, 1966;Grandjean & Hunting 1977;Van Wely, 1970) and lifting strength (Chaffin, 1974; Park & Chaffin, 1975;Snook & Irvine, 1967), books (Astrand & Rodahl, 1977) and anthropometry (Hertzberg, 1972;Roebuck, Kroemer, & Thompson, 1975), ergonomic texts that cover many approaches including the biological approach (e.g., Grandjean, 1980), and industrial engineering texts, which include sections on biological approaches (H. Davis & Miller, 1971;Konz, 1979). The 18 principles composing this approach are contained in Table 3.…”