February 14, 2017
A Jesuit high school and a luxury residential building might at first seem like odd bedfellows, until you see the ingenious mixed-use development known as 35XV at 35 West 15th Street in New York City. A clever deal enabled Alchemy Properties to acquire air rights from Xavier High by agreeing to place the proposed 18-story residential building on top of a new annex for the school. In April 2010—seven years ago this spring—Severud Associates was retained to provide structural engineering services for this unique project, which involved an array of design challenges and, ultimately, numerous inventive solutions.
Featuring sloped columns, cantilevers, and a glass façade, the tower—complete with 55 luxury condos, a fitness center, lounge, and dining room—sits on top of the school’s six-story, granite-clad annex and adds eye-catching architecture to a tree-lined block in Chelsea. 35XV’s daring architectural design required equally bold engineering, so the team at Severud Associates applied their years of experience and ingenuity to developing structural systems that maintained the architect’s aesthetic vision and also allowed the building to utilize all of its available airspace.