A modular safety shelter provides protection from fragment, overpressure, radiation, and toxic hazards through a combination of physical design of modular segments, of joint seals between modular segments, of door assemblies, and of HVAC control systems. The modular shelter is formed of two or more prefabricated concrete modular segments each including a built-in foundation, roof, and side walls, and a prefabricated concrete vestibule segment providing an airlock-like access to the shelter. The prefabricated modular segments and vestibule segment are transported to a site and assembled to each other on-site to provide a fully enclosed space within the modular shelter. A multi-layer joint seal is formed between adjacent modular segments to prevent ingress of toxic, flammable, or thermal hazards. An integrated HVAC controller monitors toxic or flammable hazards outside and inside of the shelter, and controls HVAC systems to minimize spread of contaminants upon detecting a hazard.

An extrusion component of a closure frame for defining an opening which is closable by a closure member and a method of making the same. The extrusion component comprises an elongate body having first and second sides, at least one of which is shaped for accommodating said closure member. The elongate body includes an outer layer integrally formed with an inner layer and the inner layer has an outer surface correspondingly shaped by or with an inner surface of the outer layer.

A fire 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-retardant core for a door with a central cavity includes a first solid component made from non-fibrous material that is effective to disperse solid particles and to reduce water solubility. The core also includes a second solid component made from fibrous material that is less dense than the first component, and is effective to fill volume in the central cavity. The core also includes a third component made from a fire retardant material that tends to prevent combustion. The first, second and third components are blended effectively to fill the central cavity, and to provide a fire-retardant quality to the door.

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 door with a frame for arrangement is provided in a wall opening with an opening plane, at least one fire door leaf to be opened at least in sections along an opening normal of the opening plane for fire-retardant closure of the wall opening, at least one vacuum insulation panel for reducing heat transport through the fire door leaf along the opening normal in a closed state of the fire door, and at least one leaf sealing element which connects the frame to the fire door leaf in a wind-tight manner in a closed state of the fire door. The leaf sealing element defines a leaf sealing plane in a closed state of the fire door, which is arranged parallel to the opening plane. A frame and a manufacturing method for the fire door is also provided.

A method and system for achieving compliance for a fire-rated door assembly. To comply with fire rated door assembly codes and compliance, all components, including hardware must be listed and labeled by a certification agency, such as Underwriters Laboratories (UL). The disclosure may include a hardware preparation filler solution which allows fire-rated doors to maintain fire rating and compliance when removing or modifying hardware, or converting between hardware types.

A roller shutter includes a chamber with an opening, a roller curtain movable between being fully contained within the chamber and extended beyond the chamber through the opening, and at least one guide rail along and relative to which the roller curtain is movable between being retracted and extended, wherein the roller curtain includes a plurality of slat members interlocked with each other for relative pivotal movement, the plurality of slat members collectively forming first and second major surfaces, and a first layer of fire-resistant and/or heat-resistant fabric fixedly mounted to the first major surface of the slat members and a second layer of fire-resistant and/or heat-resistant fabric fixedly mounted to the second major surface of the slat members, and wherein the guide rail includes at least a first sealing member which, when the roller curtain is extended, contacts or presses into the first layer of fire-resistant and/or heat-resistant fabric.

A core for a fire rated door includes a fire resistant center panel and an extruded fire resistant border. The fire resistant center panel has a bottom, a top, a first side, a second side, a first end and a second end. The fire resistant center panel is made of a first fire resistant material. The extruded fire resistant border is attached to the first side, the second side, the first end and the second end of the fire resistant center panel. The extruded fire resistant border is made of a second fire resistant material having a higher density than the first fire resistant material.

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.