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APRIL 2022CONSTRUCTIONBUSINESSREVIEW.COM8WHY STRUCTURALLY GLAZED BUILDING ELEMENTS ARE SO IMPRESSIVE By Anthony Callas, VP Business Development, Structural Glazing Systems, PFEIFER StructuresThere are two types of designs: one that plays it safe and relies on techniques utilized for decades, while the other challenges the boundaries of possibility. You may have observed some impressive structural glass facades that made the building stand out. What made it so memorable? Was it the crystal-like ultra-clear edges of low-iron glass?Or, the minimalist, discrete glass attachments which were absent the bulkiness of aluminum mullions? Could it have been the elegance of highly crafted architecturally exposed structural steel, the narrow strands of a tensioned cable net, or even the almost invisible structural glass fin? It could have been any of the above. Each memorable structure is an example of excellence in design, engineering, and construction. Such excellence can only be achieved by those who dare to explore beyond the templates of their predecessors.The once state-of-the-art systems of glazed pockets and pressure bars of curtain wall and silicone butt joint or VHB glazing tape adhesion to mullions and components had passed the crown of engineering's achievement to a new system and style of glass facades. As engineering science progressed, insight into material properties and advancement of computational design methods created new forms of glass attachment. The resulting product is ingenious facades of engineered glass never before seen. When considering a glass building, the first thought for many is the regimented geometry of curtain walls or window walls that are potentially pre-built as unitized rectangular panels. Ingrained in the modern era are the glass boxed towers, which became a standard in high-rise design and construction. They reached incredible heights and gave cities their identifiable skylines. The glass industry owes much to this period.However, there is a new trend in glazing, started by projects with large expansive openings that wrapped around a corner. The opening itself was infilled with tinted monolithic glass and a corner a quirk mitered joint and clear silicone sealant. What's most impressive was its surrounding structure of cantilevered flush-IN MYOPINION
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