Shield system and sandwich seam for attenuation of electromagnetic energy

A system for shielding the walls, floor and ceiling of a room against penetration of electromagnetic energy, said system comprising

• metal panels covering the walls, floor and ceiling of said room, with adjacent edges of the panels disposed in substantially abutting relationship,
• metal strips straddling the adjacent edges of the panels on opposed faces and lengthwise thereof,
• fastening means securing the strips and panels together in intimate contact in a sandwich seam to provide attenuation of radiated electromagnetic energy, and
• a layer of lossy material located between at least one of the strips and the abutting panels.

A method of shielding a room against the penetration of electromagnetic energy through the walls, ceiling and floor of the room, the method comprising

• providing electromagnetic energy attenuating panels for covering the walls, ceiling and floor of the room,
• placing a first set of electromagnetic energy attenuating strips against the walls, ceiling and floor at the locations of joints to be formed between adjacent edges of said panels,
• placing the panels against the walls, ceiling and floor, with the adjacent edges of the panels overlying said first set of strips and in substantially abutting relationship along the approximate centers of the strips,
• placing a second set of strips on the panels over the adjacent edges on the opposite face of the panels from said first set of strips,
• fastening said panels and strips together in a sandwich seam that is effective to attenuate the passage of electromagnetic energy, and
• a layer of lossy material located between at least one of the strips and the abutting panels.

A method of shielding an existing room against the penetration of electromagnetic energy through the walls, ceiling and floor of the room, the method comprising

• providing electromagnetic energy attenuating panels for covering the walls, ceiling and floor of the room,
• placing a first set of electromagnetic energy attenuating strips against the walls, ceiling and floor at the locations of joints to be formed between adjacent edges of said panels,
• placing the panels against the walls, ceiling and floor, with the adjacent edges of the panels overlying said first set of strips and in substantially abutting relationship along the approximate centers of the strips,
• placing a second set of strips on the panels over the adjacent edges on the opposite face of the panels from said first set of strips,
• fastening said panels and strips together in a sandwich seam that is effective to attenuate the passage of electromagnetic energy, the fastening means extending through the materials of the panels and strips, and
• supporting said panels and strips on the wall, ceiling and floor of the room.

A system for shielding an existing room against the penetration of electromagnetic energy through the walls, ceiling and floor of the room, the system comprising

• a first set of electromagnetic energy attenuating strips disposed against the walls, ceiling and floor of the room at locations of joints to be formed between adjacent edges of electromagnetic energy attenuating panels,
• electromagnetic attenuating panels disposed against the strips on the walls, ceiling and floor of the room, with adjacent edges of the panels overlying the strips and disposed in substantially abutting relationship along the approximate centers lengthwise of the strips,
• a second set of electromagnetic attenuating strips located on the panels at the locations of the abutting edges and opposite the first set of attenuating strips, and
• fastening means extending through the materials of the panels and strips to secure the panels and strips together in a sandwich seam that is effective to attenuate the passage of electromagnetic energy, the panels and strip being supported by the walls, ceiling and floor of the room.