The present disclosure relates to an air tight door including a frame having three frame members disposed, respectively, at a first lateral side, a second lateral side, and an upper side of an opening; and a longitudinal member disposed at a lower side of the opening. The door is rotatably connected to the frame member disposed at the first lateral side of the opening so as to open and/or close the opening. A first sealing disposed at each of the three frame members closely contacts the door in a closed state; and a second sealing elevatably disposed at a lower end of the door descends from the lower end of the door to closely contact the longitudinal member in the closed state. A locking device fixes a position of the door in the closed state; and an actuating device is configured to unlock the locking device.

Systems and methods for rectifying excessive bottom or head clearances of door assemblies are disclosed. An example system may comprise a door cap straight component installed on a first side of a fire door; a door cap L-shaped component installed on a second opposite side of the fire door; at least one intumescent strip seal fitted with the door cap L-shaped component; and end caps installed on two narrow ends of the fire door.

Disclosed are a fireproof cabinet body structure and a fireproof safety cabinet. The fireproof cabinet body structure comprises a cabinet body, the cabinet body comprises an inner panel, a gypsum board and a keel frame, and the inner panel and the gypsum board are fixedly mounted on two sides of the keel frame. The fireproof safety cabinet comprises a cabinet body and a cabinet door, the cabinet body is provided with an air inlet and an air outlet, ventilation fire-retardant valves are mounted at the air inlet and the air outlet, an inner side of the cabinet body is provided with an air supply opening corresponding to the air inlet and an air return opening corresponding to the air outlet, and the cabinet body is provided with electrostatic grounding bolts connected with the keel frame at the top part and/or side part of the cabinet body.

A method of fabricating a multijunction solar cell by providing a plurality of multijunction solar cells; dispensing an uncured silicone coating on the solar cells using an automated process with visual recognition, and curing the silicone coating on the solar cell.

Once a fire door has been installed, the door will typically require regular inspection to ensure that the fire door is still able to operate as intended. An issue typically seen with fire doors is related to the gaps between the door and the frame that being too large. The present disclosure provides a self-testing fire door system 100 comprising a first distance sensor 140 arranged to measure a first distance between a fire door 110 and a door frame 120. The first distance sensor 140 comprises a first sensor member 141 arranged on the door frame 120 and a second sensor member 142 arranged on the fire door 110 adjacent to the first sensor member 141 when the fire door 110 is in a closed position. The system 100 further includes a processor configured to measure, via the first distance sensor 140, a distance between the fire door 110 and the frame 120 and output the first distance.

A composite material, a method for the production thereof, and a fire protection element containing the composite material can be utilized for the protection of passage openings in components in the event of fire, such as building parts, through which conduits are guided. The composite material can be also used as a fire protection element for sealing passage openings and/or for joints in components.

A tire door clearance system is disclosed that includes a non-flammable material that is fastened at a first portion thereof on an inner side thereof to any of a door and door frame, and an intumescent material applied to the inner side of the non-flammable material at a second portion thereof.

A fire resistant panel for a fire door, the panel including a frame providing a rigid bordering structure for the panel and having an inner face, an outer face, an inner side and an outer side, the frame surrounding an inner space; and a core disposed within the inner space, the core having a peripheral edge adjacent the inner side of the frame.

An emergency entryway system that provides for the detection of occupants in a room, fires outside of a door, and sealing the entryway during a fire emergency is disclosed. The emergency entryway system includes a door enclosed by a door frame, at least one display unit mounted in one side of door and at least one camera mounted in the door frame on the opposite side of the door, whereby the display unit in the door displays an image transmitted from the camera from the other side of the door frame and door. The door frame of the emergency entryway system may include at least one of a smoke detector, a carbon monoxide detector, or a radon detector, at least one fire extinguisher, an oxygen sensor, an alarm, a gas inflator canister, and an inflatable tubing configured to seal a space between the door and the door frame during a fire emergency.

A sliding door system may satisfy the requirements of, and be fire-rated in accordance with, UL10B (“Standard for Fire Tests of Door Assemblies”), and/or satisfy the requirements of, and be pressure-rated in accordance with, UL10C (“Standard for Positive Pressure Fire Tests of Door Assemblies”).