Many project teams are opting to specify delegated design mulled window systems that combine multiple windows into a single unit in a larger glazed opening. While these mulled systems have become increasingly popular, their mulling components can create potential performance issues, including air infiltration, water penetration, structural failure, and reduced thermal performance.
In 2022, the authors collaborated with researchers at the University of Massachusetts, Ajla Aksamija, PhD, and Suncica Milosevic, to quantify the potential for condensation on a variety of window systems. Eleven different aluminum architectural window systems spanning a wide range of heat transfer coefficients (U-factors) and CR ratings were investigated. The research results and implications for fenestration specification are summarized herein.
Physical security retrofit is not as simple as it used to be. With today’s health compliance mandates and growing social upheaval, physical security upgrades must transcend previous technologies which only focused on minimizing organizational risks in corporate office buildings.
Thanks to the pioneering work of dedicated scientists, ornithologists, wildlife associations, and the glass industry, the future is looking brighter for the billions of birds which end up colliding with windows each year. While still in its infancy, the science of bird-safe glazing is emerging with creative new ideas and changing the way birds see and react to building glass.
This case study explores the unique solutions employed for a unitized curtain wall facade at the Raffles Boston Back Bay Hotel & Residences, a new 35-story tower nearing completion in Boston’s urban core., and located on a prominent corner site with a complex set of environmental and contextual conditions.
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