An anti-ballistic door having a keyed joint assembly substantially defining an inner perimeter of the door, and a bullet persistent panel secured internal to the door using the keyed joint assembly. The anti-ballistic door has up to a UL 752-Level 8 protection rating having a lower weight relative to conventional anti-ballistic doors and is sized to fit within conventionally sized door frames. An anti-ballistic panel is additionally provided having a keyed joint assembly substantially defining an inner perimeter of the panel, and a bullet persistent panel secured internal to the panel using the keyed joint assembly. The anti-ballistic panel has up to a UL 752-Level 8 protection rating.

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.

A sound damping door system having a door frame, a compression seal, a door slab, a bottom seal, and a concealed hinge assembly. The door frame includes male and female components adapted to engage each other in a rough door opening between first and second wall faces; and at least one isolation gasket adapted to be disposed between the male and female components. The compression seal is mounted to the door frame. The door slab includes an outer skin; an arched constrainment sheet inside the outer skin; a damping fill material inside the outer skin; and an acoustic insert inside the outer skin. The bottom seal is mounted to a bottom surface of the door slab such that the bottom seal is permitted to move relative to the door slab.

An anti-ballistic door having a keyed joint assembly substantially defining an inner perimeter of the door, and a bullet persistent panel secured internal to the door using the keyed joint assembly. The anti-ballistic door has up to a UL 752-Level 8 protection rating having a lower weight relative to conventional anti-ballistic doors and is sized to fit within conventionally sized door frames. An anti-ballistic panel is additionally provided having a keyed joint assembly substantially defining an inner perimeter of the panel, and a bullet persistent panel secured internal to the panel using the keyed joint assembly. The anti-ballistic panel has up to a UL 752-Level 8 protection rating.

Embodiments of the disclosure are directed towards a composite stiffener that is incorporated into panelized products to create stronger bonding, greater adhesion between laminated layers and less warping sandwich panels. In addition, the resulting products incorporating composite stiffeners can be lightweight, yet stronger than other lightweight panels.

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.

There is provided a security door leaf assembly, comprising a leaf frame structure, having at least a top rail member, a bottom rail member, a hinge stile member and a lock stile member; at least one inner leaf panel, removably mountable to a first side of said leaf frame structure; at least one outer leaf panel, removably mountable to a second side of said leaf frame structure, that is opposite to said first side; at least one first security-upgrade liner, and at least one first upgrade cavity, formed by said leaf frame structure, said at least one inner leaf panel and said at least one outer leaf panel, accessible via said at least one inner and/or outer leaf panel and adapted to removably receive and operatively affix said at least one first security-upgrade liner; and at least one first liner mount adapted to mount said at least one first security-upgrade liner in a predetermined position within said at least one first upgrade cavity.

A composite panel, for example formed as door (10), comprising a first fascia (11) and a second fascia (15) at least one of which is formed from metal structural sheet material, located between the first and second fascia (11,15) are a first structural foam layer (12), a metal core layer (13) and a second structural foam layer (14), the metal core layer (13) being as thin or thinner than the first fascia (11) and/or as thick or thicker than the second fascia (15).

A door includes a sandwich panel having first and second panels, and a honey comb core. The first and second panels have edge tabs foldable toward one another. There are inner frame sections disposed at edge sections of the sandwich panel and adjacent to the honey comb core and inwardly of the edge tabs. The edge tabs are folded toward one another over the inner frame sections.

A sound damping door system having a door frame, a compression seal, a door slab, a bottom seal, and a concealed hinge assembly. The door frame includes male and female components adapted to engage each other in a rough door opening between first and second wall faces; and at least one isolation gasket adapted to be disposed between the male and female components. The compression seal is mounted to the door frame. The door slab includes an outer skin; an arched constrainment sheet inside the outer skin; a damping fill material inside the outer skin; and an acoustic insert inside the outer skin. The bottom seal is mounted to a bottom surface of the door slab such that the bottom seal is permitted to move relative to the door slab.