Abstract: A floor structure includes a plurality of height-adjustable ground pad or anchor assemblies which either rest on or are embedded in the ground and which are laid out to define a grid. The top of each ground pad and anchor assembly is provided with a casting which includes laterally extending support flanges to which floor panel receivers are pinned to the ground pads and anchor assemblies along the grid pattern. The floor panel receivers include elongated horizontal channels, open at the top for receiving tongues on the peripheral framework of individual floor panels. Floor joints fill the openings between panels. A separate peripheral wall support base provides a channel for receiving a wall panel, and it is tied to the ground pads or anchors.