Normally used for areas with suspended low height ceilings. Forcing access to the facility to be made from the room itself.
They can be:
Non-accessible modular ceiling: ceilings with visible profiles. They have to be registered from the inside of the room.
Non-accessible continuous ceiling: ceilings with concealed profiles, aimed at reducing number of joints and avoiding visible profiling. Access to these ceilings is generally limited, particularly in the absence of auxiliary access structures or specific removable access points.
Depending on the type of ceiling selected and the needs of the installation, the finishes and thicknesses used are variable. The most used panels are sandwich type, made of a rigid, stable high density support (polystyrene, polyurethane, rock wool) and two lacquered steel sheets.