What Are The Different Types Of Flat Slab Construction? Flat slab construction is a strengthened concrete slab supported by concrete columns without the use of beams. Flat slab construction is specified as a one-sided or two-sided support system with the load of the slab being focused on the supporting columns and a square slab known as drop panels. https://ptt.edu/blog/what-are-the-different-types-of-flat-slab-construction/