Achieving an adjustment range of 347 to 525mm is not feasible with normal gas strut mechanisms, since the starting dimension of 347mm requires a gas strut of relatively short stroke (100mm), because larger strokes would result in excessive collapsed heights. Gas struts with strokes of 120mm were most common in the chairs evaluated for the government contract, with starting heights averaging 413mm. However, it is reasonable for chair manufacturers to supply two height ranges which would together cover the range determined by anthropometric data. A range of 370 to 520mm was recommended in the checklist, but a.
