Patent ID: 8261930

Claim:
A portable tank comprising: (a) a plurality of panels defining a tank interior, where the panels include; (i) essentially parallel side panels, wherein each side panel includes a top edge, a front edge, and a rear edge; (ii) a roof panel connected to the side panel top edges; (iii) a front panel connected to the side panel front edges and to the roof panel; (iv) a rear panel connected to the side panel rear edges and the roof panel; (v) a floor panel connected to the side panels, the rear panel, and the front panel; (b) a floor support structure, wherein the floor support structure includes; (i) side channels connected to the side panels; (ii) a plurality of cross members connected to the side channels, wherein the cross members have V shaped upper support surfaces including at least one cross member with a smooth upper support surfaces, and at least one cross member with a notched upper support surfaces defining notches, wherein the smooth upper support surface is different than the notched upper support surface, and wherein the cross members are positioned below the floor panel; (iii) a plurality of mid floor beams received in the notches, where the mid floor beams are tubular, the mid floor beams are essentially perpendicular to the cross members, the mid floor beams have a mid floor beam support surface flush with the cross member upper support surfaces, and wherein the mid floor beams are between cross members with smooth upper support surfaces; (iv) a plurality of rear floor beams received in the cross member notches, wherein the rear floor beams are tubular; (c) an axle support structure connected to the floor support structure; (d) an axle connected to the axle support structure; (e) a stairway connected to the floor support structure; (f) support channels connected to the side wall; (g) at least one pipe penetrating at least one panel, wherein the pipe has an outside terminal end outside of the tank; (h) a valve connected to the pipe outside terminal end; (i) at least one manhole penetrating at least one panel; (j) a fifth wheel plate connected to the floor support structure; (k) a kingpin connected to the fifth wheel plate; and (l) a backing plate connected to the side channel.