The electromagnetic shielding of an enclosable building structure is provided by applying a shielded covering to overlay optical openings in the building structure. The shielded covering comprises a metal-coated woven substrate and a shielding coupling. The metal-coated woven substrate has a woven substrate and a metal coating. The woven substrate may be organic and comprise threads of intermingled fibers such as silk fibers. The metal-coated woven substrate may also have a protection feature such as transparent resin, of barriers of glass or transparent polymeric material. The shielded coupling connects the shielded covering to other shielding components of a shielded building structure to preserve shielding continuity over the interface between shielding components.

An electromagnetic seal is provided for preventing the transmission of electromagnetic energy between corresponding walls of adjoining building modules. The seal includes a first support extending inwardly from an end of a first building module, a second support extending inwardly from an end of a second building module, and a gasket assembly compressed between the first support and the second support.

A multi-shelled shielded room is provided that has an outer shell with a first soft magnetic alloy having an initial permeability ?.sub.i1 and a maximum permeability ?.sub.max1 and an inner shell with a second soft magnetic alloy having an initial permeability ?.sub.i2 and a maximum permeability ?.sub.max2. The outer shell encases the inner shell and ?.sub.max1>?.sub.max2 and ?.sub.i2>?.sub.i1.

A shelter with electromagnetic interference (EMI) protection includes first and second panels including EMI protection connected by at least one of: (i) a hinged connection; (ii) a scissor joint connection. The hinged connection includes an EMI protected hinge including a first hinge leaf, a second hinge leaf, and a hinge joint. A flexible EMI protection covering extends across the hinge joint. The scissor joint connection includes a first joint portion connected to the first panel, a second joint portion connected to the second panel, and an EMI gasket located in an open channel of the first joint portion. Part of the first joint portion is received in a second open channel of the second joint portion and part of the second joint portion is received in the first open channel of the first joint portion and the gasket is compressed.

A board includes a first magnetic conductive plate and a second magnetic conductive plate. The first magnetic conductive plate has a first magnetic conductive direction. The second magnetic conductive plate overlaps with the first magnetic conductive plate. The second magnetic conductive plate has a second magnetic conductive direction. The first magnetic conductive direction and the second magnetic conductive direction cross.

A radiation-shielding attenuation structure and method of forming the attenuation structure, wherein the attenuation structure is made by additively manufacturing a concrete material that includes one or more attenuation dopants configured to enhance the radiation shielding of the concrete material. The one or more attenuation dopants may be configured in the concrete material to attenuate one or more types of radiation, such as electromagnetic radiation, gamma radiation, X-ray radiation, or neutron radiation. The attenuation structure formed by the concrete material may be additively manufactured on-site according to a model that has already been pre-certified for safe or secure use, thereby providing a repeatable and reproducible process that can reduce lead times and fabrication costs. The attenuation structure may be easily modified during the additive manufacturing process to have different concrete mixtures with different attenuation characteristics, which increases the tailorability and flexibility in design of the attenuation structure.

An EMI shielding and acoustic attenuation door frame and door system, including: a door connected to a door frame with a hinge, the door including a bottom portion having a plate, a door gasket, a door sponge, and conductive tape for grounding the door; the door frame including: a jamb section including: a jamb main frame; a jamb back frame; wherein the jamb main frame and back frame being adjustable along the wall; a layered jamb gasket at least partially in between the door frame and the jamb main frame; a flanged magnetic jamb gasket fixed to an acoustical retainer with a fastener; wherein the door is grounded when the door is in a closed position against the door frame; a sill section including: a spreader bar having at least one sill gasket covered by a threshold, the spreader bar and at least one sill gasket contacting a floor shielding.

A subsea substation system including: an oil-filled water impermeable enclosure; an AC-transformer, and at least one overcurrent device electrically connected to the AC-transformer, the at least one overcurrent device, the AC-transformer, and the electrical connections between them are accommodated in the oil-filled water impermeable enclosure, wherein the enclosure includes thermal zones within the enclosure, wherein the AC-transformer is arranged in a first thermal zone and the overcurrent devices are arranged in a second thermal zone of the enclosure, a thermal layer separate the first thermal zone and the second thermal zone, the at least one thermal layer is configured to allow oil flow between the thermal zones while reducing heat flow between the zones.

An electromagnetic wave diffraction device for fixing onto an outer wall face comprising a plurality of electrically conductive resonant elements having an L-shaped profile fixed parallel on the outer face. Each element comprises a first and second wall secured at right angles to one another along a common edge. The first wall is fixed at a right angle to the outer face by a fixing edge parallel to the common edge. The second wall has a free edge parallel to the common edge. The free edges of all elements are parallel and arranged on the same side relative to the common edge of the corresponding element. A weather protection arrangement for reinforcing the protection of a capacitive area generated in a space between the outer face and the second wall, in the form of a water impermeable dielectric material panel, is fixed to the outer face and covers the elements.

A method for deploying a lightweight, flexible Faraday cage around a device can include the step of directing the conductive fluid flow in a manner that causes a shroud to form over the device. In some embodiments, a flexible material such as canvas can be deployed over the device and the conductive fluid can be sprayed onto the flexible material to form the shroud. In other embodiments, a plurality of nozzles can be placed around the perimeter of the device, and the nozzles can be directed at a predetermined point over the device. The streams can meet at the predetermined point, collide and thereby provide the conductive shroud for the device. The shroud can have a skin depth, which can be chosen according to the desired frequency of electromagnetic radiation to be blocked, typically from one to one hundred millimeters (1-100 mm).