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Architecture engineering, Applied mechanics
This mechanism was developed out of the increasing requirement for individual users to be able to adjust the height of their desk to an ergonomically correct position for their physicality. Sitting at a standard height desk (usually 720-740mm) for long durations has been linked to health problems, including back and posture problems and DVT, for those who fall either side of the average user in terms of anthropometric height range. A typical problem with "systems furniture" which is widely installed in most corporate open-plan offices is that components are "shared" for cost, functionality and aesthetic purposes. Typically, this means that desks are fixed together in clusters, all at the same height while of course users come in different heights. This mechanism allows users to individually adjust the height of their desk (with a range of 180mm) to the most ergonomically suitable position whilst allowing for the furniture to remain systemised and to share componentry.
Walshe, J. (2010) Patent for Jack - Height Adjustable Office Desk Mechanism. Designed by John Walsh for Italian Manufacturer GGA.