It is provided an underground structure, usable at least as a shelter, having a light weight substantially cylindrical portion, of a cylindrical casing having a weight to area ratio in the range of 8 to 30 kg/m2. The casing has a strength level and an impermeability level high enough for serving as part a sealable underground liquid storage tank and at least one sealable opening connecting it to external spaces. The cylindrical portion includes openings for entering and exiting the interior of the portion, and passageways communicate the structure with outside spaces. The surrounding ground provides a geo-thermal reservoir which is used to regulate by a flowing fluid the temperature of the shelter space, modules inside the shelter or above ground structures. The structure includes provisions for receiving of variety of auxiliary systems like an air-treatment system, communication system water and power supply.

It is provided an underground structure, usable at least as a shelter, having a light weight substantially cylindrical portion, of a cylindrical casing having a weight to area ratio in the range of 8 to 30 kg/m2. The casing has a strength level and an impermeability level high enough for serving as part a sealable underground liquid storage tank and at least one sealable opening connecting it to external spaces. The cylindrical portion includes openings for entering and exiting the interior of the portion, and passageways communicate the structure with outside spaces. The surrounding ground provides a geo-thermal reservoir which is used to regulate by a flowing fluid the temperature of the shelter space, modules inside the shelter or above ground structures. The structure includes provisions for receiving of variety of auxiliary systems like an air-treatment system, communication system water and power supply.

A modular storm shelter is provided. The shelter has a central node with individual modules attached to the node and extending outwardly from the node. Any number of additional modules may be attached to other modules to extend the modules farther from the node and increase the capacity of the shelter. The outwardly extending modules function as stabilizing extension arms that prevent the shelter from overturning during extreme wind events, such as tornados and hurricanes. Each of the modules can be individually transported to an installation site so that the shelter can be assembled on site. Once assembled, the storm shelter rests on the ground and does not require attachment to a concrete slab or similar foundation.

A modular storm shelter is provided. The shelter has a central node with individual modules attached to the node and extending outwardly from the node. Any number of additional modules may be attached to other modules to extend the modules farther from the node and increase the capacity of the shelter. The outwardly extending modules function as stabilizing extension arms that prevent the shelter from overturning during extreme wind events, such as tornados and hurricanes. Each of the modules can be individually transported to an installation site so that the shelter can be assembled on site. Once assembled, the storm shelter rests on the ground and does not require attachment to a concrete slab or similar foundation.

Various forms of rubber compositions may be applied to create a temporary, removable waterproof barrier for various building structures or components such as doors, windows, houses, barns, sheds, mobile homes, automobiles, recreational vehicles, boats, campers, tents, vinyl awnings, covers and tarps, and the like. In some aspects, the form of removable rubber compositions may include a sprayable aerosol-based liquid composition, a viscous liquid rubber composition, a malleable paste or caulk, or a rubberized adhesive tape. In some aspects, the rubber compositions may be applied to portions of a building structure or component which are at risk from water damage due to an approaching storm or natural event, and to create a temporary, watertight barrier that is removable without damaging the building structure or component. The rubber compositions and rubberized tape may be removed from the building structure or component after the storm or natural event has subsided.

Various forms of rubber compositions may be applied to create a temporary, removable waterproof barrier for various building structures or components such as doors, windows, houses, barns, sheds, mobile homes, automobiles, recreational vehicles, boats, campers, tents, vinyl awnings, covers and tarps, and the like. In some aspects, the form of removable rubber compositions may include a sprayable aerosol-based liquid composition, a viscous liquid rubber composition, a malleable paste or caulk, or a rubberized adhesive tape. In some aspects, the rubber compositions may be applied to portions of a building structure or component which are at risk from water damage due to an approaching storm or natural event, and to create a temporary, watertight barrier that is removable without damaging the building structure or component. The rubber compositions and rubberized tape may be removed from the building structure or component after the storm or natural event has subsided.

A system for detecting arc faults in a solar array generally comprises a plurality of solar panels connected in series, where each solar panel comprises a positive and negative output. A panel monitoring device is connected between the positive and negative output of each solar panel. The panel monitoring device comprises a switching device configurable to disconnect an output from the solar panel. The panel monitoring device comprises logic configured to scan a frequency spectrum of the solar panel and log locations of a plurality of valleys in the spectrum, monitor the plurality of valleys to determine if the plurality of valleys rise above a threshold value, report a fault status when the plurality of valleys rise above the threshold value, and automatically disable the output of the solar panel upon the determination of a fault status.

Disclosed herein is a refuge comprising a roof; at least four wall members each fixedly attached to the roof, wherein the refuge has a width of 60 inches or less, and wherein each wall member comprises a ballistic material; a door disposed in a first wall member, wherein the door has a width of at least 18 inches; a power system disposed within the enclosure, the power system comprising a primary power source and a secondary power source; and an armored air purification system configured to provide purified air to the enclosure.

Disclosed herein is a refuge comprising a roof; at least four wall members each fixedly attached to the roof, wherein the refuge has a width of 60 inches or less, and wherein each wall member comprises a ballistic material; a door disposed in a first wall member, wherein the door has a width of at least 18 inches; a power system disposed within the enclosure, the power system comprising a primary power source and a secondary power source; and an armored air purification system configured to provide purified air to the enclosure.

A structural tent intended for use as a living space able to withstand extreme temperatures, while still being comfortable and used on a temporary basis; comprising a frame on which there are assembled first profiles and lower posts which are attached to a plurality of second profiles, brackets and upper posts, which form the structure on which a ridgepole is supported; and where a filler material is introduced into the gap created between the frame and the outside fabric; and where, finally, the ridgepole is integrally supported on the upper posts, where honeycomb plates are supported, an impermeable roof being arranged on the honeycomb plates and the gaps in the honeycomb plates being filled with a fine granular material.