All of the slabs have wedge-shaped edges ... "If the shape is right, each stone holds the others in place and the construction is stable," said project co-leader Prof. Johann Kollegger.

The slab consists of several segments. Wedge-shaped spaces are left between ... "We can see that in old stone arches," says Johann Kollegger. "If the shape is right, each stone holds the others ...

On that note, be sure to have a fabricator pre-selected, as moving and cutting stone slabs is not a typical DIY job and ...