ASPIRE is a quarterly magazine published by PCI in cooperation with the associations of the National Concrete Bridge Council. The editorial content focuses on the latest technology and key issues in the Concrete Bridge Industry.

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14 | ASPIRE , Spring 2009 By using ground-based crane erection of precast segments, construction does not require the use of large gantries on site. Photos: Finley Engineering Group Inc. P E R S P E C T I V E Several years ago, even before sustainable development was the important topic it is today, the American Segmental Bridge Institute (ASBI) acknowledged the following phrase as an organization goal—get in, get out, stay out. Cliff Freyermuth, who was then ASBI director, wrote in 2003 that this concise statement summed up ASBI's mission of "… reducing project construction time and reducing the need for project maintenance activities following construction." What does that have to do with sustainability? Plenty, if you consider sustainability more than an issue for environmentalists and ecologists. Sustainable Measures, a consulting firm dedicated to promoting sustainable communities, says sustainability can be measured by whether the "economic, social, and environmental systems that make up the community are providing a healthy, productive, meaningful life for all community residents, present and future." That's a lot bigger than using energy-saving bulbs in the lighting plan. At its core, sustainable development offers all kinds of short- and long-term benefits to a community—whether it's the residential community, the driving public, or the environment. With recent advances made in post-tensioned segmental concrete bridge construction, we're making significant strides toward achieving higher levels of sustainability in our projects as an industry. Specifically, new grouting material specifications and new approaches to grouting tendons, improvements in epoxy technology, innovation in post- tensioning systems, and new developments in concrete mix designs resulting in better, higher-strength concretes are improving our ability to get in, get out, and stay out. SuStainability Get In, Get Out, and Stay Out by Craig Finley, Finley Engineering Group Inc. Aspire_spr09.indb 14 3/11/09 4:15:22 PM

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