Sliding door

Sliding doors were used as early as the 1st century CE in Roman houses (as evidenced by archaeological finds in Pompeii, Italy).

However, there is no evidence to confirm that the Romans were the first humans to have invented or used sliding doors.

To reduce air- and smoke-tightness and improve sound insulation, brush seals are commonly used.

All top-hung sliding door gear systems have a maximum weight limit per pair of trolley hangers.

Additional devices include soft-closers and dampeners, which make it easier to close the door gently.

Automatic sliding doors are commonly found in offices and shop entrances.

[1] Advantages of sliding doors are the small space requirements for door-opening, and their relative ease of automation.