There is disclosed a service trailer which may be quickly deployed to a site to provide potable water, electricity, lighting and a storage of grey water.

A transportation trailer can include a cargo tank with a shell that includes an outer wall, an inner wall, and an insulating core between the outer wall and the inner wall. The shell can be unsupported by structural rings, and the cargo tank can be a frameless cargo tank. The cargo tank can be formed by decoiling respective coils of inner-wall material, outer-wall material, and insulating-core material, joining the inner-wall material, the insulating-core material, and the outer-wall material to form a sandwich-type panel, and welding the sandwich-type panel to form the shell.

There is disclosed a service trailer which may be quickly deployed to a site to provide potable water, electricity, lighting and a storage of grey water.

A quasi-cylindrical cargo container is formed of a plurality of rigid, curved panels together forming first and second semi-cylindrical shells, and a plurality of rigid, flat extension panels bridging the first and second semi-cylindrical shells. A method of manufacturing the container includes forming the first and second semi-cylindrical shell from the curved panels, forming the quasi-cylindrical shell from the first and second semi-cylindrical shells and the flat extension panels, forming collars conformably encompassing the quasi-cylindrical shell, constricting the collars to compress joints formed at abutting edges of pairs of adjacent panels, rolling the shell and collars sequentially to bring the joints to a lower position, welding inside seams of the joints when at the lower position, removing the collars, rolling the shell sequentially to bring the joints to an upper position, and welding outside seams of the joints when at the upper position.

A trailer configured to lower an overall center of gravity thereof. The trailer comprises a tank, a wheel assembly, a height and a length. The tank comprises a cavity contained within a lower body, a tilted body, a front end and a rear end. The lower body comprises a lower body height, a lower body length, a lower body ground clearance and a lower center of gravity. The tilted body comprises a tilted body ground clearance, a tilted body length, the height and a tilted portion center of gravity. The tank comprises the length, a height equal to the height of the tilted body, and a ground clearance equal to the lower body ground clearance.

A trailer configured to lower an overall center of gravity. The trailer comprises a tank, a wheel assembly, an upper body height and a trailer length. The tank comprises a cavity contained within a lower body, an upper body, a transitioning body, a front end and a rear end when the cavity within the trailer is filled with a liquid fluid, the liquid fluid is evenly distributed along the trailer length of the trailer since a diameter of the lower body, the upper body and the transitioning body are equal.

A trailer configured to lower an overall center of gravity. Said trailer comprises a tank, a wheel assembly, a kingpin assembly, a height, a length. Said tank comprising a cavity contained within a lower body, an upper body, a transitioning body, a front end, and a rear end. Said tank comprising a lower center of gravity, an upper center of gravity and said overall center of gravity. Said lower body comprising said lower center of gravity, a lower body ground clearance, a lower body length and a lower body height. Said upper body comprising said upper center of gravity, an upper body ground clearance, said height, and an upper body length. Said tank comprising said length, a height equal to said height, and a ground clearance equal to said lower body ground clearance. Said transitioning body comprising a transitioning body length.

A tank trailer configured to lower an overall center of gravity. The trailer includes a tank, a wheel assembly, an upper body height and a trailer length. The tank includes a cavity contained within a lower body, an upper body, a transitioning body, a front end and a rear end when the cavity within the trailer is filled with a liquid fluid, the liquid fluid is evenly distributed along the trailer length of the trailer since a diameter of the lower body, the upper body and the transitioning body are equal. Other trailers are presented.

A truck bed having a flat bed deck adapted for mounting on a truck to haul cargo and a tank within the deck adapted for containing and hauling liquid. The deck includes a top plate, bottom plate, front end, rear end and sides. The sides are connected between outer edges of the front end and rear end. The top plate is connected to the front end, rear end and sides. The bottom plate is connected to the front end, rear end and sides. A tank is formed by the top plate, bottom plate, front end, rear end and sides, whereby the sides are connected in a seal state for holding the liquid.

There is disclosed a service trailer which may be quickly deployed to a site to provide potable water, electricity, lighting and a storage of grey water.