An example system in accordance with an aspect of the present disclosure includes an opening assembly and a guard assembly installable in a floor above an enclosed region. The opening assembly is actuatable between an open configuration to provide access to the enclosed region, and a closed configuration in which the opening assembly provides a closed surface. A guard assembly is mounted to the opening assembly and actuatable independent of the opening assembly, between a retracted configuration flush with the closed surface of the opening assembly, and a deployed configuration to serve as a guard for the opening assembly.

An example system in accordance with an aspect of the present disclosure includes an opening assembly and a guard assembly installable in a floor above an enclosed region. The opening assembly is actuatable between an open configuration to provide access to the enclosed region, and a closed configuration in which the opening assembly provides a closed surface. A guard assembly is mounted to the opening assembly and actuatable independent of the opening assembly, between a retracted configuration flush with the closed surface of the opening assembly, and a deployed configuration to serve as a guard for the opening assembly.

An assembly for securely enclosing an opening defined by a building structure comprising a frame sized to be disposed to substantially surround the opening and engage the structure and a panel pivotally securable to the frame and sized to substantially cover the opening, the panel having a front and a back. Locking means for selectively locking the panel to the frame in a closed position and unlocking the panel so that it can be pivoted to an open position, the locking means comprising selectively an internal locking means manually operable only from the inside of the building and an external locking means manually operable from the outside of the building.

An assembly for securely enclosing an opening defined by a building structure comprising a frame sized to be disposed to substantially surround the opening and engage the structure and a panel pivotally securable to the frame and sized to substantially cover the opening, the panel having a front and a back. Locking means for selectively locking the panel to the frame in a closed position and unlocking the panel so that it can be pivoted to an open position, the locking means comprising selectively an internal locking means manually operable only from the inside of the building and an external locking means manually operable from the outside of the building.

An assembly for securely enclosing a door opening or window opening defined by a structure of a building comprising. The assembly includes a panel that is sized to substantially cover the opening and is pivotally secured to a frame. In some cases, the panel includes a proximal side pivotally connected with the frame and a distal side that swings between an open and closed position. The panel includes a door guard configured to protect the distal side of the panel from being forcibly pried away from the frame.