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Category Archives: Web Exclusive

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Solving window wall problems by eliminating causes

Some windows walls  employ designs that include exposed slab edges, but these can lead to potential problems. Rethinking the basic design concepts could have important benefits. All images courtesy Raymond Ting

Window walls eventually fail under repeated occurrences of causes like loads, movement, stress fatigue, and the degradation of material properties due to aging. How can one simply anticipate the ‘causes’ and then design to eliminate them in the first place? A rethinking of traditional glazing design is in order.

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The Value in Standardizing Door Schedules

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by Melany Whalin, CSI
Horror stories abound among hardware consultants who have been called in at the last minute to create hardware specifications that were needed yesterday, only to be given incomplete or inaccurate door schedules on which to base their specifications.

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Using UHPC to improve box-beam bridge performance

Pouring ultra-high-performance concrete (UHPC) for longitudinal joints—the material could offer new benefits in box-beam bridge design and construction. Images courtesy Ohio University’s Russ College of Engineering and Technology

Out of the many types of bridges used across the country, adjacent prestressed, concrete box-beams have become popular for short and medium spans. Since these bridges are cost-effective, fast to construct, and easy to design, they are preferred by many state and local agencies. Currently used in about two-thirds of the country, many of these bridges are now approaching the end of their life span. Ultra-high-performance concrete (UHPC) could offer game-changing advances for this type of structure.

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