Cargo handling system

A jack assembly for use in the loading and unloading of cargo, comprising:

• a jacking mechanism, said jacking mechanism including a jack and caster/wheel unit removably secured thereto;
• means operably connected to said jacking mechanism for removably securing said jacking mechanism to said cargo in two different orientations, said removable securing means including a support column, means interposed between said jacking mechanism and said support column for affixing said jacking mechanism to said support columnin two distinct and separate positions with respect to said suport column, said affixing means including a member having a first and a second end, said first end thereof being affixed to said jacking mechanism, said member having an extension protruding therefrom and being positioned substantially midway between said first and said second ends, said extension having a flat surface thereon for attachment to said support column at said two distinct and separate positions in order to provide said two different orientations of said jacking mechanism with respect to said cargo, and means for removably attaching said support column to said cargo in at least one position.