Adjacent Precast Box Beam Bridges

For years, adjacent prestressed concrete box-beam bridges have been employed for short and medium spans—two-thirds of all state Department of Transportations (DOTs) use them. While they are popular due to ease of construction and low profile, cracks in the longitudinal grouted joints between adjacent beams have often been observed....
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What’s Wrong With My Precast Concrete Garage?

Precast double-tee construction has become a dominant method for building parking garages in North America. The double-tee beam deck system of this construction type provides a finished wearing surface, supports vehicle loading, and forms an integral part of the lateral force-resisting system. However, maintenance and repair of deck connections...
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Bearing Pad Durability in Precast Concrete Garages

Bearing pads are used widely in precast concrete parking garages. They function as buffers between the separate concrete members to prevent damage and facilitate movement (much like cartilage between bones at joints). Bearing pads should last for the design life of the structure, but need to be replaced when...
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G8WAY DC: Innovative UHPC Elements

Ultra-high performance concrete (UHPC) provides strength, ductility, durability, and aesthetic design flexibility while still being highly moldable and able to replicate texture, form, and shape. It is this combination of superior properties that also provides architects and engineers with a new kind of freedom—to design unique, unprecedented UHPC architectural...
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The Rising Artistry of Tilt-up

Although it has long been associated with utilitarian projects like factories and big-box stores, tilt-up concrete construction also has the capacity up to deliver multi-story, irregularly shaped, complex projects. Examining recent award-winning projects provides examples of how architects have been embracing tilt-up in increasing intensity.
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Tilt-up: An opportunity for the resurgence of craft

As monumental-sized panels of concrete are lifted from their horizontal onsite casting position to a vertical element of the building enclosure, an impressive and unique craft is unveiled. In this industry, contractors are discovering inherent opportunities for a renewed focus on craftsmanship.
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Making the air barrier argument for tilt-up

For many years, designers and contractors have espoused tilt-up construction for providing a more airtight building envelope than competing wall assemblies, such as wood and metal stud wall, metal siding, and concrete and brick masonry. Now, code language may also be a supporting factor.
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