A stackable cargo container apparatus has a frame assembly formed by interconnected structural members, a substantially planar base, interconnecting side walls and at least one personnel access door. At least one lifting harness member of unitary or singular construction is operationally attached to the frame assembly, and permits lifting of the cargo container apparatus from its bottom and away from welds or other possible weak points. An integrated cargo weight measurement assembly permits quick and efficient determination of cargo weight placed on the planar base, and includes a digital display or other output device.

A stackable cargo container apparatus has a frame assembly formed by interconnected structural members, a substantially planar base, interconnecting side walls and at least one personnel access door. At least one lifting harness member of unitary or singular construction is operationally attached to the frame assembly, and permits lifting of the cargo container apparatus from its bottom and away from welds or other possible weak points. An integrated cargo weight measurement assembly permits quick and efficient determination of cargo weight placed on the planar base, and includes a digital display or other output device.

A louvered sidewall cargo container assembly for reducing crosswind exposure includes a cargo container, which is substantially cuboid shaped and comprises a pair of sidewalls, a front, a back, a bottom, and a roof. Each sidewall comprises a plurality of louvers. An actuator is engaged to the cargo container and is operationally engaged to each of the plurality of louvers. The actuator is positioned to selectively motivate each of the louvers between a first position a second position. In the first position, the louver is substantially perpendicular to the bottom and each of the plurality of louvers is in a closed configuration. In the second position, the louver is transverse or parallel to the bottom, extends into the cargo container, and each of the pluralities of louvers is in an open configuration. In the open configuration, the pluralities of louvers allow passage of a crosswind through the cargo container.

A louvered sidewall cargo container assembly for reducing crosswind exposure includes a cargo container, which is substantially cuboid shaped and comprises a pair of sidewalls, a front, a back, a bottom, and a roof. Each sidewall comprises a plurality of louvers. An actuator is engaged to the cargo container and is operationally engaged to each of the plurality of louvers. The actuator is positioned to selectively motivate each of the louvers between a first position a second position. In the first position, the louver is substantially perpendicular to the bottom and each of the plurality of louvers is in a closed configuration. In the second position, the louver is transverse or parallel to the bottom, extends into the cargo container, and each of the pluralities of louvers is in an open configuration. In the open configuration, the pluralities of louvers allow passage of a crosswind through the cargo container.

A sealing system for a covered tank, particularly a fixed gas-sealing tank in a wastewater treatment system, includes a thrust ring positioned just inside the tank rim, secured to a series of radial beams for the cover. Preferably supported on corbels anchored to the interior tank wall, the thrust ring has an outwardly extending generally horizontal flange that overlies the edge of the tank rim. To this flange and to the top of the tank rim is secured a flexible membrane seal, around the periphery of the tank. The membrane seal is easily installed, reliable as a seal, and can be efficiently replaced when needed.

A sealing system for a covered tank, particularly a fixed gas-sealing tank in a wastewater treatment system, includes a thrust ring positioned just inside the tank rim, secured to a series of radial beams for the cover. Preferably supported on corbels anchored to the interior tank wall, the thrust ring has an outwardly extending generally horizontal flange that overlies the edge of the tank rim. To this flange and to the top of the tank rim is secured a flexible membrane seal, around the periphery of the tank. The membrane seal is easily installed, reliable as a seal, and can be efficiently replaced when needed.

A storage tank includes an upper tank having a cylindrical shape and a lower circumferential edge having a contoured shape. A top surface of a tank floor body is in sealing contact with the lower circumferential edge and conforms to the contoured shape. The tank floor body has a saddle shape. An upper cap is joined to an upper circumferential edge of the upper tank. The upper cylindrical tank shell, the tank floor body, and the upper cap form an inner storage volume. The storage tank may also include a lower skirt having a cylindrical shape and an upper circumferential edge having the contoured shape. A bottom surface of the tank body floor is joined to the upper circumferential edge and the lower tank skirt, and the upper tank share a common central axis.

A storage tank includes an upper tank having a cylindrical shape and a lower circumferential edge having a contoured shape. A top surface of a tank floor body is in sealing contact with the lower circumferential edge and conforms to the contoured shape. The tank floor body has a saddle shape. An upper cap is joined to an upper circumferential edge of the upper tank. The upper cylindrical tank shell, the tank floor body, and the upper cap form an inner storage volume. The storage tank may also include a lower skirt having a cylindrical shape and an upper circumferential edge having the contoured shape. A bottom surface of the tank body floor is joined to the upper circumferential edge and the lower tank skirt, and the upper tank share a common central axis.

The present disclosure provides several novel improvements to freight storage and transportation services. In one detailed though non-limiting aspect, methods and means for safely and efficiently adjusting the interior volume space of an otherwise fixed-volume storage and transportation container are provided.

The present disclosure provides several novel improvements to freight storage and transportation services. In one detailed though non-limiting aspect, methods and means for safely and efficiently adjusting the interior volume space of an otherwise fixed-volume storage and transportation container are provided.