As the first LEED Gold-certified project in Kissimmee, the 54,000-square-foot facility demonstrates the Toho Water Authority's commitment to conserving water and energy for Osceola County's future. Concrete tilt-up wall construction reduced the project's total amount of resources and subsequent environmental impact.

The number of panels was reduced by using multiple cranes during lifting. According to the Tilt-Up Concrete Association, the project has the world's largest panel by area at 2950 square feet, the second heaviest panel ever at 330,000 pounds, and the ninth widest panel at 56 feet, 3 ¼ inches (at date of submittal).

Originally intended to be constructed with precast concrete panels over a steel frame, the design and construction teams collaborated to analyze many alternative solutions and finally decided on concrete tilt-up walls. These modifications not only allowed for a reduction in structural steel and a cleaner installation of insulation, but also reduced costs and saved time.

This also eliminated transporting precast panels from production facility to jobsite, reducing emissions and environmental impact. Larger panels reduced the number of panel joints, limiting the potential for air and moisture intrusion, and improved the performance and health of the building.

Concrete also was used for the parking lots and sidewalks. This increased the solar reflectivity (SRI) of the surface of the site's hardscape. The increased SRI of the concrete reduces the heat island effect. The project's concrete mixes included about 20% fly ash.

The finish face of the panel was specified and delivered as smooth. It required no texture in its finish coating. The architect also insisted on 90-degree corners at all openings, no chamfers, and 45-degree sharp corners at the panel miter joints.

Project Participants

OWNER: Toho Water Authority, Kissimmee, Fla.

CONCRETE PRODUCER: Cemex, Jupiter, Fla.

CONCRETE CONTRACTOR: Tilt-Con, Altamonte, Fla.

ARCHITECT/DESIGNER: KZF Design, Orlando, Fla.

STRUCTURAL ENGINEER: TLC Engineering for Architecture, Cocoa, Fla.

GENERAL CONTRACTOR: Balfour Beatty Construction, Orlando

LANDSCAPE ARCHITECT: Bellomo Herbert, Orlando

CIVIL ENGINEERS: Franklin, Hart & Reid, Kissimmee