CTS load carriage system phase III D - Stage 2: Effect of rucksack lateral rods on the load distribution to the Torso


  1. Reid, S.A.
  2. Whiteside, R.A.
  3. Bryant, J.T.
  4. Stevenson, J.M.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN);Queen's Univ, Kingston ONT (CAN) Ergonomics Research Group
A primary factor in the success of the human body carrying heavy loads is the ability to transfer the weight of the load onto the body without inducing large ancillary forces. These secondary forces result from the need to balance or stabilize the load and do not directly contribute to the vertical lift required. An optimized Load Carriage System (LCS) should minimize secondary loading on the musculature, specifically on the smaller muscle groups of the upper body. In addition to the muscular effort required carry a load, Stevenson et al. (1997) found that the horizontal reaction force acting in the lumbar area is a major factor limiting the load carrying capacity of soldiers. Load transfer to the waist is an effective means to reduce high levels of contact pressure occurring at the shoulder straps (Holewijn, 1997) and has been shown to reduce Rucksack palsy incidence (Bessen et al, 1987). An anthropometrically correct 50th percentile male manikin was split in the transverse plane at the level of the navel and instrumented with a six degree of freedom load cell to allow determination of the rucksack load applied to the shoulders and upper torso independent of the load applied to the hips and lower trunk. TRUNCATED
Load carriage;Rucksacks;Ergonomics;Biomechanical models;Load optimization;Back (anatomy);Iliac crest;Lumbar area;Spine (anatomy);Clothe The Soldier
Report Number
DCIEM-CR-2001-089 — Contract Report
Date of publication
15 Mar 1999
Number of Pages
Hardcopy;Document Image stored on Optical Disk

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