As a rule of thumb, one elevator group is sufficient for buildings with up to 35 landings. For buildings with more than 35 landings, a division into low-rise, medium-rise or high-rise groups is recommended. Configurations using distribution floors and transfer levels as well as shafts “stacked” one above the other is recommended. These groups are usually located in the projection area of groups of elevators underneath and are linked to the ground floor landing by express elevators.

During the morning rush hour, the TWIN system divides the shaft into “virtual zones” in the area where both elevator cabins can move independently of one another. Passengers in the upper zone of the building enter the TWIN elevator cabin via the upper access level. The same principle applies to the lower elevator cabin and the lower zone of the building. After the morning peak traffic, the virtual zones are “opened” and both TWIN elevator cabins serve the complete shaft. When installing a TWIN system, it makes sense to provide two access levels connected by escalators.

This will be the most efficient way to improve the traffic within your building!