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Dispelling Church Window Restoration Myths
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Church Executive, May 2009
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Whether a church is a historic property or a modern facility, it is not immune to problems such as water or air infiltration that may arise with its windows. Many times, decision makers assume replacing the existing windows in their churches is the most economic route. However, numerous factors must be considered before such a decision is made.
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Temperature Can Affect Upper Floors of Precast Garages
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Parking Today, March 2009
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Precast concrete double-tees and joists are a common feature on many parking decks. While the use of these materials is proven for parking deck construction, several owners have noticed that the pre-stressed framing members on the top level would be begin to camber.
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Not so ‘shocking' results
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Structural Engineer, March 2009
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Success with impressed cathodic protection for a National Historic Landmark.
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Buchanan House Parking Structure: Repair and Installation of Post-Tensioning Tendons
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Concrete Repair Bulletin, Mar/Apr 2009
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The Buchanan House offers residents of the 200-unit luxury apartment complex nearly 600 parking spaces in a below-grade, three-story parking garage. In addition to the luxury residential units, the facility features restaurants and other retail shops on the street level, which results in additional parking needs. The consulting engineer for the project recognized that the post-tension concrete structure had begun to experience degradation from water infiltration. Additionally, the use of de-icing salts had caused corrosion of the existing buttonhead post-tensioning system.
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Understanding Post-Tensioned Concrete Repair
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Structural Journal, Winter 2009
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In post-tensioned concrete construction, reinforcing bars and post-tensioning tendons are required to support self-weight and intended service loads. As these structures age, many time-related problems occur, such as corrosion of the tendons or strands. For owners of a post-tensioned structure, the responsibility of ensuring the safety of tenants or those using the structure is paramount.
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Controlling Corrosion on the La Unidad Bridge in Campeche, Mexico
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Concrete Repair Bulletin, Jan/Feb 2009
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Nearly two miles long, the 30-year-old bridge is subjected to an aggressive marine environment and is part of a major highway that runs along the coastline from Texas to the tip of the Yucatán peninsula. A visual inspection of the structure revealed that cracks had penetrated the concrete matrix and corrosion of the reinforcing was present and active. Since the bridge is essential for the community – and any detour would be hefty, the Mexican federal and local transportation authorities elected to repair it.
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The Building Envelope – A Little-Known Key to Energy Efficiency
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Quorum Magazine, October 2008
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Energy efficiency is one of the most pressing concerns for today's property owners. Municipalities are increasingly regulating the energy efficiency of buildings, and owners are becoming more aware of their responsibilities to reduce their buildings' energy consumption. As a result, many property owners are scrambling to do whatever they can to make their buildings more efficient. In the mad rush of updating and making changes, many fail to realize a building system that can have a huge impact on a building's energy efficiency. The building envelope plays a critical role, as it forms the barrier between a building's interior and exterior environments. And with proper management, the building envelope can significantly slash a building's energy demand.
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Christ Church Harbor Apartments/University Specialty Hospital Plaza Deck Repair
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Concrete Repair Bulletin, September/October 2008
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Originally constructed approximately 30 years ago, time had taken its toll on this 30,000 square foot, multi-level plaza deck. Most of the exposed aggregate concrete topping on all three levels had deteriorated. Due to sections of failed waterproofing, water was migrating through the concrete topping and leaking into the occupied parking garage located below most of the plaza deck. In order to achieve the optimum repair solution, owners coordinated their efforts to engage a qualified engineer and repair contractor to repair the plaza deck, fountain and planter box, prevent future leaks and update and modernize the overall appearance of the area so that tenants and visitors could once again enjoy the plaza.
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