1144第15街办公楼
丹佛
Best Project, Office/Retail/Mixed-Use, and Excellence In Safety

Key Players
老板:Hines
领导设计公司：皮卡德·奇尔顿（Pickard Chilton）
Design Architect:Kendall/Heaton Associates Inc.
总承包人：Hensel Phelps Construction Co.
Structural/Civil Engineer:Martin/Martin Consulting Engineers
MEP工程师：ME Engineers
关键分包商：安德森钻探；贝克混凝土；CTL |汤普森极端防火；Harris Rebar；ISEC

Completed in January, 1144 15th Street is Denver’s fourth-tallest office building. Not only is it an impressive structure at 602 ft tall, it’s also certified LEED Gold, featuring 27 floors of Class A office space along with 14 levels of parking.

LEED黄金的名称是通过大量节能获得的，包括高效的冷水机，用于办公室的大量日光以及停车场的LED照明，那里有10个电动汽车充电站。屋顶上的植被降低了热岛的效果，有助于使新建筑成为丹佛天际线的环保补充。

The distinctive tower was designed to capture the beauty of the Rocky Mountains. Clad in high-performance glass and an aluminum curtain wall, the office floors typically feature 10-ft floor-to-ceiling glass. On some levels, the glass extends up to 15 ft high, allowing for even more dramatic views of the Rockies.

除了建造自1983年以来丹佛市中心最高的商业办公大楼外，由承包商Hensel Phelps领导的项目团队还汇编了令人印象深刻的安全记录，在超过140万小时内，有0.68的OSHA记录率和零损失的时间。除承包商自己的船员外，峰会上还有400多名工人，平均有30个不同的交易。

Hensel Phelps devised a subcontractor safety initiative specifically for this project, where safety-training sessions were developed for each trade related to the work it was performing. The safety meetings evolved from a Hensel Phelps team member leading the meetings to the specialty contractors themselves giving the safety orientations with general contractor oversight.

Hensel Phelps项目经理John Naccarato说：“每个人都知道安全问题随着工作的进行而发生变化。”“这就是为什么我们开始更加参与分包商的安全会议的部分原因。这项工作运行得如此之快，无法牺牲安全性，因此我们在每次分包商培训会议上都有HP代表。到第二或第三周，该潜艇知道我们在那里可以改善每个人的安全文化。”

The contractor’s safety initiative provided the trades working on site with a program they can use moving forward. Hensel Phelps also conducted outreach meetings with major nearby tenants about potential noise, traffic and safety concerns, while HP leaders coordinated with other general contractors working in close proximity to achieve an integrated safety plan.

尽管安全是最关心的问题，但这并不是唯一的问题。还必须解决复杂的结构问题。也许在这么高的建筑物上的主要是混凝土的物理特性。正式的602英尺高，该建筑必须额外延伸3/16英寸。每层楼高（额外的高度），以说明混凝土及其长期蠕变的弹性缩短。

The building’s signature element is a rounded, steel-and-glass crown that splits into two segments soaring into the sky. The 38,000-sq-ft roof required 752 connection points secured by workers who labored 600 ft in the air. Hensel Phelps, structural engineer Martin/Martin, the structural steel fabricators and curtain-wall subcontractors all checked every connection.

狭窄的城市地点只能架设一个塔起重机。Naccarato说：“当然，我们希望有两台塔式起重机，但根本没有任何位置来支撑另一个起重机。”“我们有公用事业限制，在第15街以下运行多个线路。”他说，一辆起重机意味着所有交货都是在及时完成的​​，通常以15分钟的间隔被阻止。

另一个挑战来自丹佛蓬勃发展的建筑经济。据报道，去年该市已经完​​成了13.5亿美元的开发项目，另外计划了22.6亿美元的计划或正在建设中。这限制了工人的供应和建筑检查人员的可用性。

Through various delays, the contractor kept the owner informed and still hit the project’s critical milestones. But Naccarato says those milestones and the superior quality of the project could not have been achieved without extensive use of virtual design.

“We were working with a very smart owner who knew exactly what they wanted, so we virtually modeled the entire space for them. There wasn’t a single feature that wasn’t modeled first,” he says.

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