Abstract: An elongated ceiling grid member including (1) an upper portion having spaced upper portion side walls (a) threaded to receive and retain a first threaded member and (b) with lowermost edges, (2) a lower portion having spaced lower portion side walls (a) configured to receive and retain a second threaded member and (b) with uppermost edges, and (3) a middle portion that (a) connects the lowermost edges of the upper portion side walls and the uppermost edges of the lower portion side walls and (b) includes a pair of middle portion side walls that curve inwardly from the lowermost edges of the upper portion side walls and the uppermost edges of the lower portion side walls to contact each other between those edges.

Abstract: An elongated ceiling grid member including (1) an upper portion having spaced upper portion side walls (a) threaded to receive and retain a first threaded member and (b) with lowermost edges, (2) a lower portion having spaced lower portion side walls (a) threaded to receive and retain a second threaded member and (b) with uppermost edges, and (3) a middle portion that (a) connects the lowermost edges of the upper portion side walls and the uppermost edges of the lower portion side walls and (b) includes a pair of middle portion side walls that curve inwardly from the lowermost edges of the upper portion side walls and the uppermost edges of the lower portion side walls to contact each other between those edges.

Abstract: An elongated ceiling grid member including (1) a threaded member receptacle having a pair of parallel, spaced side walls that are threaded to receive and retain a first threaded member, (2) a vertical wall parallel to and spaced laterally from the pair of side walls, (3) a slanted wall extending outwardly and downwardly from the pair of side walls and joined to the vertical wall and (4) a lower portion at the bottom of the vertical wall and configured to support a ceiling tile.

Abstract: A system for containing a nuclear reactor is disclosed. The system includes a nuclear containment structure comprising a plurality of metallic rings stacked axially to form the nuclear containment structure. The nuclear containment structure includes a central chamber that comprises a volume enclosed by the inner wall of each of the plurality of metallic rings, and also includes a plurality of auxiliary chambers. The central chamber encloses a nuclear reactor vessel, wherein the inner wall of the plurality of metallic rings is flush with the nuclear reactor vessel. Cooling channels also exist within the nuclear containment structure. The nuclear containment structure is configured to shield the nuclear reactor vessel from kinetic events originating external from the nuclear containment structure and to shield an external environment from kinetic events within the nuclear reactor vessel.

Abstract: A structure and process for containing a nuclear reaction is disclosed. The structure and process may involve a nuclear containment structure including a plurality of metallic rings stacked axially to form the nuclear containment structure, the nuclear containment structure being configured to: mitigate, by using a physical barrier, the movement of radionuclides from inside a containment structure to a surrounding space; shield, by varying the alloy properties throughout the containment structure, an exterior of the containment structure from radiation produced inside of the containment structure; regulate, by transferring thermal energy, a temperature within the containment structure; regulate, by storing thermal energy, the temperature within the containment structure; shield, components within the nuclear containment structure from kinetic events external to the nuclear containment structure; and shield, the external environment, from kinetic events within the nuclear containment structure.

Abstract: An exemplary waterproofing membrane comprises a carrier layer having a non-bituminous pressure-sensitive waterproofing adhesive, a protective layer coated on the non-bituminous adhesive, and a second waterproofing adhesive layer on the other face of the carrier to permit adherence of the membrane to a cementious surface and to permit concrete to be cast against the non-bituminous layer and protective coating and to be bonded thereto when cured. Further exemplary membranes comprise a dusted layer on the protective coating to permit foot traffic. The membranes of the invention are useful in so-called horizontal and vertical lagging installations. Methods for waterproofing between cementious surfaces, in tunnels, and on concrete decks are also disclosed.