FOLDED PLATE AND BARREL VAULT
In this structure, a folded plate structure is combined with a barrel vault. For the same width of element, the transverse bending moments in the folded plates are usually larger than the barrel vault so it is important to keep the width of the plates so the slab will not be thick. The form is not especially suitable for long spans since the structural efficiency of the folded plate is not very great. However, it does provide a chance to develop an unusual form.
A very interesting combination is the folded plate Z shell with the north light shell by making the upper end of the Z a smooth curve and the lower end a folded plate.