Support device for composite elevated floor

A support device for a composite elevated floor, comprising:

• at least one support base assembly, having a base, at least two first connectors, at least one second connector, and at least one pair of open slots, each first connector being respectively disposed outside a periphery of the base, a surface of each first connector being lower than a bottom surface of the base, each second connector is disposed within the periphery of the base between a corresponding pair of open slots, one surface of the at least one second connector being lower than an upper surface of the base and higher than the surface of each first connector;
• a plurality of crossbeams, wherein at least two first connectors and the at least one second connector connecting with a respective one of the plurality of crossbeams;
• at least one floor of a first type disposed in a first area, four corners of each of floor of a first type having a groove conforming to the surface of the base and the surface of the first connector;
• and
• a plurality of floors of a second type in a second area, the second area being on the periphery of the first area, each corner of the floors of a second type conforming to the upper surface of the base and the one surface of the at least one second connector.