PNC广场的塔楼
Pittsburgh
Best Project
OwnerThe PNC Financial Services Group
领先设计公司Gensler
General ContractorPJ Dick
Civil EngineerBurohappold
结构工程师Burohappold
MEP EngineerBurohappold
可持续发展顾问Paladino and Co.
FacadeHeintges
Facade MaintenanceLerch Bates
The project team was handed a simple but daunting task: Build one of the greenest office towers in the world for PNC’s corporate headquarters.
“Aspirations such as these mandate a complete rethink of how high-performance high-rise buildings are designed,” the project’s submission says.
Ultimately, the 33-story building that opened a year ago exceeded LEED Platinum certification standards. Its state-of-the-art double-skin facade, solar chimney, energy recovery wheel and radiant heating system allow the building to function without electricity or fan power for nearly half the year. The building can consume up to 50% less climate-control-related energy than similarly sized buildings. A green roof also collects rainwater for flushing toilets, irrigation and cooling towers.
设计团队的第一个决定之一是将建筑物立面向True South定向，从而使结构最大化日光。“这也教会了团队的前身课程：[我们]不能仅凭技术就能努力，而是团队需要采用被动和积极的策略的结合，”提交说。“由于被动策略本质上是免费的，因此团队采用了一种被动的方法，这是该项目的指导第一原则。”
But the building also has plenty of active design elements and sustainable technological solutions. But none of them was installed without first being tested on a 1,200-sq-ft mock-up, which allowed the project to stay on schedule and on budget. For example, when the mock-up revealed that two wall types in the facade system didn’t ventilate properly, air vents were added to increase ventilation and eliminate potential operational expenses. “The team noticed a significant increase in temperature in just a few hours,” the awards submission states. “The mock-up went from cold to uncomfortably warm very rapidly. By identifying this in the mock-up the team was able to adjust the control strategy for the double skin to reduce this effect.” The project team also tested the tower’s cooling, lighting and facade systems.
One Best Projects judge said, “Not all of these processes are innovative, but the ability to coordinate all these systems, at this scale, is impressive.”
该建筑包括10,000吨钢和400,000平方英尺的玻璃。约95％的解构建筑材料可重复使用，约93％的建筑废物被回收或重复使用。混凝土被粉碎并重新用作回填材料。石膏板被压碎并重新使用，作为轻量级板。钢铁被融化并重新用作钢筋。
The project had a lost-time accident rate of only 0.7—mostly the result of minor injuries—during the total 1.6-million worker-hours.
