Framing ribs were extrapolated directly from the 3D model and sent to the site preassembled. The bottom of each rib was machined to align with common level points on the Periform system.
The screw hole layout used an algorithm that analyzed the degree of curvature reducing the spacing between screws as the amount of curvature increased to ensure the mechanical bond to the framing ribs.
Two layers of 1/4-in. Finnform plywood. Sections were prekerfed to bend to the framing ribs and machined so that when bent to the form the seams came together.
The complexity curvature of the spout required a solid form be manufactured. The form was coated with fiberglass to ensure the final finish of the concrete in this area matched the Finnform.
The completed concrete surface reflects CW Keller’s ability to bring digital fabrication to cast in place concrete structures.