Compound structures with scalable interior room sizes using modular units to form mobile, semi-permanent and permanent structures

A compound structure comprising:

• a first mobile unit including:
• a first floor structure;
• a first roof structure;
• at least one first side wall that is coupled to the floor structure and the roof structure to define a first open side for the first mobile unit;
• a second mobile unit including:
• a second floor structure;
• a second roof structure;
• at least one second side wall that is coupled to the floor structure and the roof structure to define a second open side for the second mobile unit;
• a support truss extending the full longitudinal extent of the first open side, the second open side or both the first and second open side, the support truss being adapted to couple the first and second roof structures together to releasably connect the first and second mobile units so that the first open side of the first mobile unit faces the second open side of the second mobile unit when the first and second mobile units are assembled adjacent to one another in the compound structure;
• one or more bridge plates installed to cover longitudinal edge portions of the first and second floor structures adjacent to one another;
• a compressible seal between the first mobile unit and second mobile unit;
• and
• at least one clamp for urging the first mobile unit and second mobile unit together and compressing the compressible seal between the first and second mobile units, the at least one clamp coupled to a corner block of the first mobile unit and a corner block of the second mobile unit.