INTERSECTION SHELL - FOLDED PLATE
A two element folded plate is shown here as an intersection shell and is similar to the previous example. Almost all the combinations used for curved shells may be used for folded plates, the resulting forms are almost unlimited. In the above sketch, a cross form is used. The columns may be place so that there is no column at the corner and the central dome is suspended from four cantilevers. However, it is better to put the column in the corner so that the central intersection may be used as the stiffening element. The resulting thrusts can be carried by diagonal braces in the plane of the outside walls and may be concealed by the wall construction. The same effect is achieved by a solid concrete wall in each corner. Ties around the barrel would be very unsightly in this structure.