Glazed ellipse highlights Pensacola cancer center

“The ‘egg’ is a true ellipse. And because the ellipse of the building has multiple radii, creating a smooth curvature was challenging. The splay portion of the curtain wall left little room for error.” —  John Schang, architect, Caldwell Associates.

The basics: The 95,430-square-foot, four-story Cancer Center of Sacred Heart Hospital, Pensacola, Fla., features a complex aluminum, glass and concrete ellipse that challenged glass and glazing companies. The egg-shaped structure is elevated so cars can pass underneath it, and features about 50,000 pounds of glass. At the tip of the “egg” is a 70-foot-high concrete, glass and aluminum stairwell.

The players: Architects, Caldwell Associates, Pensacola; design consultant, HKS Inc., Dallas; contract glazier, system fabricator, Merritt Glass Co., Pensacola; framing system supplier, Kawneer Co., Norcross, Ga.

The glass and systems: impact-resistant version of Kawneer 1600 Wall System 1 and IR 501 storefront framing system, with insulating laminated 1 5/16-inch impact resistant glazing; IR 501 is large missile impact resistant. Kawneer 350 IR Entrances were used in the building to provide extra strength for applications where more stringent code requirements include wind-borne debris protection. The 350 IR Entrances used laminated 9/16-inch impact-resistant glazing infill with square glass stops and an interior silicone seal.