A door assembly for an electromagnetic shielded enclosure includes a metal door frame for defining a passageway into the enclosure and a door for selectively enclosing the passageway. The door includes a door leaf pivotally coupled to the frame. A set of radio frequency (RF) seals is connected to the exposed peripheral edge of a conductive plate in the door leaf. Each RF seal includes a resilient movable finger which overlies a U-shaped bracket mounted along the outer edge of the door leaf. A plurality of air cylinders is mounted within each bracket and is designed to urge the resilient finger of each RF seal into contact with the door frame.

A frameless window installation assembly is adapted to be mounted on a building wall, and includes a window sheet unit, and inner and outer bar holders. The window sheet unit has opposite inside and outside surfaces. The inner bar holder is made of metal, is disposed around a periphery of the inside surface, and is adapted to be secured to the building wall. The outer bar holder is made of metal, is disposed around a periphery of the outer side surface, is spaced apart from the inner bar holder, and is adapted to be secured to the building wall. The inner bar holder and the outer bar holder are not directly interconnected by a metal structure. The window sheet unit is secured between the outer and inner bar holders.

A door assembly for an electromagnetic shielded enclosure includes a metal door frame for defining a passageway into the enclosure and a door for selectively enclosing the passageway. The door includes a door leaf pivotally coupled to the frame. A set of radio frequency (RF) seals is connected to the exposed peripheral edge of a conductive plate in the door leaf. Each RF seal includes a resilient movable finger which overlies a U-shaped bracket mounted along the outer edge of the door leaf. A plurality of air cylinders is mounted within each bracket and is designed to urge the resilient finger of each RF seal into contact with the door frame. By integrating the RF seal and its related mechanical components into the door, the passageway into the enclosure is rendered less obtrusive. Additionally, the use of multiple air cylinders to actuate each RF seal creates operational redundancy.