Abstract: A magnetically shielded room has four walls, a floor, and a ceiling. One of the walls has a doorway therethrough, and a sliding door is provided to close the doorway. Each of the four walls, the floor, the ceiling, and the door is formed of at least one layer of electrically conductive material to exclude radio frequency energy from the interior of the room, and at least one layer of high magnetic permeability material to exclude magnetic fields from the interior of the room. Preferably, at least the wall with the doorway therethrough and the door are formed of two electrically conductive plates and a layer of high magnetic permeability material on each of the plates, the electrically conductive plates of the wall being spaced sufficiently far apart that the sliding door slides into the space between the plates when the doorway is opened.

Abstract: A magnetically shielded room has four walls, a floor, and a ceiling. One of the walls has a doorway therethrough, and a sliding door is provided to close the doorway. Each of the four walls, the floor, the ceiling, and the door is formed of at least one layer of electrically conductive material to exclude radio frequency energy from the interior of the room, and at least one layer of high magnetic permeability material to exclude magnetic fields from the interior of the room. Preferably, at least the wall with the doorway therethrough and the door are formed of two electrically conductive plates and a layer of high magnetic permeability material on each of the plates, the electrically conductive plates of the wall being spaced sufficiently far apart that the sliding door slides into the space between the plates when the doorway is opened.

Abstract: A shielded door assembly for a generally rectangular opening in the electrically conductive wall of a grounded building has an electrically conductive frame secured to the wall along three of the sides of the opening. A tubular frame is secured to the first frame along the three sides thereof. An electrically conductive threshold having a non-interrupted contact surface is secured to the tubular frame at the remaining side of the opening. An electrically conductive door stop is secured to a first edge of said tubular frame and extends outwardly therefrom and cooperates with the tubular frame and the first frame for defining a pocket. An electrically conductive tubular door rim is pivotally secured to said first frame and is adapted for pivoting between an open and a closed position.