A multipurpose relocatable structure includes a floor system, a framework secured to the floor system, and walls coupled to the framework. The walls include a number of panels that are secured along adjacent vertical edges. The multipurpose relocatable structure may include a preconfigured interior, one or more doors having an emergency escape hatch, a protected electrical connector, an environmental control system that is configurable between operational and transport configurations, and lifting corners having securement apertures.

Large format polymeric containers formed by injection molding include a main body having internal surfaces of high density and smoothness that define the internal space. The large format containers can include external features such as reinforcement ribs that are formed integrally with the container body, the reinforcement ribs having greater thicknesses than other portions of the walls of the container. The internal surfaces can include rounded corners and sloping towards a center of the container. Methods of manufacturing the large format polymeric containers include forming the polymeric main body using injection molding. The polymeric main body can be formed of multiple injection molded parts that are joined, or formed as a single piece. The injection molding can include applying between approximately 700 bar and approximately 1100 bar of pressure where at least a portion of the internal surface contacts a mold surface.

Large format polymeric containers formed by injection molding include a main body having internal surfaces of high density and smoothness that define the internal space. The large format containers can include external features such as reinforcement ribs that are formed integrally with the container body, the reinforcement ribs having greater thicknesses than other portions of the walls of the container. The internal surfaces can include rounded corners and sloping towards a center of the container. Methods of manufacturing the large format polymeric containers include forming the polymeric main body using injection molding. The polymeric main body can be formed of multiple injection molded parts that are joined, or formed as a single piece. The injection molding can include applying between approximately 700 bar and approximately 1100 bar of pressure where at least a portion of the internal surface contacts a mold surface.

A container including a first panel with a first edge having a first protrusion with a first contoured profile with at least one projection, a second panel with a second edge having a second protrusion with a second contoured profile with at least one projection, and a spline with a first channel that defines a recess with an interior profile, and a second channel separate from the first channel that defines a recess with an interior profile. The first and second channels receive the first and second protrusions, respectively, such that the first contoured profile is complementary to a portion of the interior profile and the second contoured profile is complementary to a portion of the interior profile. The first and second panel include a mid-section extending from the first and second edges, respectively. The first and second edges have a greater thickness than the thickness of the mid-sections.

A container including a first panel with a first edge having a first protrusion with a first contoured profile with at least one projection, a second panel with a second edge having a second protrusion with a second contoured profile with at least one projection, and a spline with a first channel that defines a recess with an interior profile, and a second channel separate from the first channel that defines a recess with an interior profile. The first and second channels receive the first and second protrusions, respectively, such that the first contoured profile is complementary to a portion of the interior profile and the second contoured profile is complementary to a portion of the interior profile. The first and second panel include a mid-section extending from the first and second edges, respectively. The first and second edges have a greater thickness than the thickness of the mid-sections.

A wheeled shipping/transport cart includes a cart frame that supports a plurality of wheels. The cart frame supports a plurality of stackable trays. The trays include a tray frame with opposed end members, a plurality of longitudinal support members disposed between the opposed end members, and a plurality of upright members nesting with upright members of an adjacent tray. A support structure is disposed between the opposed end members to form an arc corresponding to a curved surface of an article to be supported by the support structure. A pin is received through each of the upright members of the plurality of stackable trays to retain the stackable trays in a stacked configuration.

A wheeled shipping/transport cart includes a cart frame that supports a plurality of wheels. The cart frame supports a plurality of stackable trays. The trays include a tray frame with opposed end members, a plurality of longitudinal support members disposed between the opposed end members, and a plurality of upright members nesting with upright members of an adjacent tray. A support structure is disposed between the opposed end members to form an arc corresponding to a curved surface of an article to be supported by the support structure. A pin is received through each of the upright members of the plurality of stackable trays to retain the stackable trays in a stacked configuration.

A portable wind turbine is adjustable between an operating configuration and a stowed configuration. The portable wind turbine comprises a turbine tower and a base. The base includes a floor and a pair of opposing sidewalls. The base includes four lower corners. The base is configured to store the turbine tower when the portable wind turbine is in the stowed configuration. The turbine tower is oriented in an upright manner such that the turbine tower projects upwardly away from the floor of the base when the portable wind turbine is in the operating configuration. An outrigger is attached at each of the four lower corners of the base when the portable wind turbine is in the operating configuration.

Methods and apparatuses for shipping of fabricated rectangular wooden modules used for construction of a wood frame structure and for shipping of other bulky items are described. In particular, the disclosure features a modified shipping container for shipping the fabricated rectangular wooden modules and methods of loading, transporting, and unloading the fabricated rectangular wooden modules. The modified shipping container features a removable header system and a removable cover. The fabricated rectangular wooden modules include a module length axis, a module width axis, a bounded wood perimeter, and joists or rafters oriented perpendicularly to the module length axis, and are stacked as cargo in the interior of the container such that joists or rafters of the fabricated rectangular wooden modules are substantially vertical and the length axes of the modules are substantially parallel to a length axis of the container.

According to some embodiments, a pressure relief valve system comprises a valve body coupled to a pressure chamber. The valve body defines a vapor flow path between the pressure chamber and the atmosphere. A valve orifice in the valve body is configured to allow vapor to flow between the pressure chamber and the valve body. A vapor conduit comprises a vapor conduit first end coupled to the valve orifice and a second end opening into the pressure chamber. The vapor conduit forms a passageway between the vapor conduit first and second end. The vapor conduit also comprises a vapor conduit orifice near its first end. The vapor conduit orifice is configured to allow the vapor to flow from the pressure chamber into the vapor conduit. A gravity-operated valve positioned near the vapor conduit first end is configured to control the flow of vapor through the vapor conduit orifice.