Plasticized and assembleable cover such as for use with waterway constructed transport barges including structurally reinforcing inner trusses, in-molded end wall ladder and four point lift locking/unlocking door for selectively accessing a barge interior

A cover for use with an elongated and inner perimeter defined opening associated with a transportable barge, said cover comprising:

• a body including a plurality of interconnected sections extending in both widthwise and lengthwise fashion relative to an edge defining an open perimeter of the barge and including first and second end portions and intermediately defined and alternating female and male sections arranged in joint abutting fashion, said male cover sections each exhibiting first extending edges along each of opposite ends, alternating female cover sections each exhibiting second extending edges which locate and engage said male extending edges;
• a plurality of perimeter edge locations brackets defined along side edge locations of each cover section and including at least one of opposing pairs of lifting eyes and locking pins and adapted for either securing said cover section upon the barge perimeter defining edge or for lifting the cover section off of the barge;
• a plurality of arcuate trusses incorporated into recessed and width extending undersides of each cover section;
• at least one door subassembly incorporated into each section and traversable over interior openings defined in said sections, each of said door subassemblies further comprising a pivot handle connected to an end of said door and, upon rotating upwardly, unseating said door from a perimeter edge of the cover in an upwardly displacing and opening position to permit said door to be transported away from the opening for accessing a cargo carrying interior associated with the barge;
• and
• an integrally formed stairway extending in a widthwise direction and leading to said door subassembly.