The mechanical installations comprise the set of installations; plays; equipment and ductwork that is incorporated into the building for the vertical movement of users (elevators); to mechanically maintain environmental conditions and air renewal (air conditioning and forced ventilation) and other dynamic building requirements (door motors). the proper use of these facilities must take into account the hours of use; the characteristics of the activities and the number of users. the design must be adapted; the location and selection of the lift equipment and / or forklift trucks to the needs of the building's use from a perspective of functionality and energy efficiency. this is important since in many cases the buildings are designed assuming a level of occupation significantly higher or lower than the actual use. generally speaking, elevators must handle around 12% of the building's population in just five minutes. plants - section - installation details. autocad - dwg.