Folded Plate Arch


This structure is suitable for quite long spans and forms for the concrete can be used many times because each unit can be made self-supporting.

All of the different section shapes of folded plates are possible with this type of structure. The Z shape can be used to provide north light.

As in the folded plate shapes, an edge plate is required for the outside member. Placing of concrete on the steep slope at the springing of the arches may be a problem unless blown-on concrete is used or the lower portion of the shell may be precast on the ground and lifted into place.