Abstract: A modular structure is assembled through a multiplicity of modules aligned in a series of horizontal rows, with each successive row being higher than the preceding row by a given height. Each row is composed of series of adjacent modules of the same height in that row, the modules composed of four vertical posts with adjacent modules sharing the same two intermediate posts between them. In alternating rows, the vertical posts are strengthened by widthwise crossbeams extending from adjacent the top of one vertical post to adjacent the bottom the next vertical post for all widthwise pairs of vertical posts in the given row. Each vertical post is anchored to the ground by being welded to a base plate assembly which in turn in bolted or anchored into the ground or concrete floor. Each module supports a concrete formed bed.