Engineers Blast-Resistant Window Wall System for Zorinsky Federal
Wausau Window and Wall Systems has engineered a high-performance,
blast-resistant curtainwall system for the $50-million renovation
to the Zorinsky Federal Building in Omaha.
The 415,000-square-foot interior and exterior renovation was overseen
by the General Services Administration (GSA) Public Buildings Services
Heartland Region with a specially formed team of experts including
the U.S. Army Corps of Engineers, Leo A. Daly's architectural office
in Omaha, general contractor Caddell Construction of Birmingham,
Ala., and glazing contractor Aluminum Wall Systems Inc. of Kent,
Wash., along with Terracon Consulting Engineers.
Renovation of the existing 12-story building, built in the 1960s,
began in 2003. Wausau says it worked with the GSA and Aluminum Wall
Systems early in the design process to meet the building's requirements
for structural safety and energy-efficiency. The company engineered
and fabricated 49,305-square-feet of blast-mitigating curtainwall
plus an additional 18,970-square-feet of interior curtainwall.
The courthouse's glass exterior features Wausau's four-sided factory-glazed,
unitized system and its SuperWall system, which was field-glazed
by Aluminum Wall Systems. Both systems incorporate 1.25-inch protective
glass. For the building's interior curtainwall, Wausau supplied
its SuperWall system with quarter-inch glass. All of the systems'
aluminum framing and exterior sunshades were finished by Linetec
in a clear anodize.
Total completion of the project is expected this fall. Five years
prior, the multi-phased project was initiated with a "green"
demolition consisting of site preparation, asbestos abatement, materials
recycling and reuse, site restoration and monitoring of other environmental
factors. During the process, 23.75 tons of salvageable materials,
including solid oak benches, were saved for reuse in the local community
95 percent of the doors, and 100 percent of the carpet squares,
plumbing fixtures and wood and metal cabinetry were reused in local
schools. In all, 37,500 tons, (80 percent) of concrete and other
materials were diverted from landfills, representing an $8 million
savings to the taxpayers.