FAIA建筑师约翰·罗南（John Ronan）表示：“大多数拥有高层建筑的建筑师都会立即考虑形状。”。但这导致了“一个充满自我参照物的城市，没有对话。”对于151 North Franklin的设计，Ronan采取了相反的方法：他没有关注建筑的形式，而是问：“你如何将城市纳入建筑？反过来，建筑如何使城市变得更好？”

“Most architects who get a high-rise building immediately think about shape,” says architect John Ronan, FAIA. But that results in “a city full of self-referential object buildings with no dialogue.” For the design of 151 North Franklin, a spec office tower in his home base of Chicago, Ronan took the opposite approach: Instead of focusing on the building’s form, he asked, “How do you pull the city into the building? And conversely, how does the building make the city better?”

罗南和他的同名公司约翰·罗南建筑师事务所（John Ronan Architects）的项目团队本着城市设计的理念与委员会接洽：他们在街道对面现有的袖珍公园的基础上，将绿地或至少是绿地的理念延伸到整个结构中，在底部有一个广场和视觉上开放的大堂，在第二层有一个露台，顶层有一个玻璃幕墙。罗南将外部空间视为不同的环境，每一个都适合不同的活动，从午餐会议，到安静的工作，到一天结束时的放松，但也非常适合作为整体的一部分。“我认为它们是室外房间，”他说。“如果我们从协作休息室的角度重新思考公共空间，这样人们就可以离开办公室而不离开大楼，那该怎么办？”

广场由塔楼底部雕刻而成，位于柱廊后面，散布着桦树，一楼是咖啡厅。罗南说，树枝和树叶在两层楼高的亚麻制成的不锈钢天花板上隐约可见，因此“树木的效果被放大了”。

Ronan and the project team from his eponymous firm, John Ronan Architects, approached the commission with urban design in mind: Building upon an existing pocket park across the street, they extended the green space—or at least the idea of it—right through the structure, with a plaza and visually open lobby at the base, a terrace on the second level, and a glassed-in deck on the top floor. Ronan conceived of the exterior spaces as distinct environments—each suited to different activities, from lunch meetings, to quiet work, to unwinding at the end of the day—but also very much as a part of the whole. “I think of them as outdoor rooms,” he says. “What if we rethink public space in terms of collaboration lounges, so that people can leave the office without leaving the building?”

The plaza is carved out of the base of the tower, behind a colonnade, and features a scattering of birch trees and seating for a ground-floor café. The branches and leaves are hazily reflected in the linen-finished stainless steel ceiling panels two stories above, so that “the effect of the trees is amplified,” Ronan says.

二楼的露台感觉更加私密，尽管它通过直接通向街道的室外楼梯向公众开放。“11点到1点阳光直射，”罗南说，“其他时候是阴凉和沉思的。”租户专用的屋顶露台上有玻璃墙，用作防风墙。它可以容纳大型集会，但石笼种植园中的山楂树限定了较小的休息区。在塔顶放置一个平台是一个明智的选择：36层楼高的塔楼比周围的建筑要短，所以罗南说，“把钱花在塔顶的一个平台上有多大意义？”相反，露台将街道广场拉入天际线。

罗南创造灵活城市空间的方法不仅限于室外，还延伸到大堂。电梯核心的安全措施限制了租户进入上层，但大部分空间仍然可以公开进入。罗南说：“这感觉就像是一个宏伟的大厅，但同时，大厅内的空间也变得更小，更像是一个下沉的休息室。”

The second-floor terrace feels more private, though it is open to the public via an exterior stair leading directly to the street. “It gets direct sunlight from 11:00 to 1:00,” Ronan says, “and at other times it’s shady and contemplative.” The tenants-only roof terrace is lined with glass walls that serve as a windbreak. It can accommodate large gatherings, but hawthorn trees in gabion planters define smaller seating areas. Placing a deck at the top of the tower was a pointed choice: At 36 stories, the tower is shorter than the buildings around it, so, Ronan says, “How much sense does it make to spend the money on a form at the top of the tower?” Instead, the terrace draws the street plaza into the skyline.

Ronan’s approach to creating flexible urban space isn’t limited to the outdoors, it extends to the lobby as well. Security at the elevator cores limits upper-floor access to tenants, but the majority of the space remains publicly accessible. “It feels like a grand lobby,” Ronan says, “but at the same time there are spaces within the lobby that feel smaller and more intimate—like a sunken lounge.”

罗南指定了喷射雾花岗岩作为对a类大厅空间传统装饰的致敬，但他避开了他所说的许多塔楼大厅的“陵墓般”感觉，选择了喷砂、火焰和打磨三种饰面，使其不那么正式。核心部分覆盖着喷砂镜面玻璃，以反射桦树和每个电梯组末端全高窗户的日光。

罗南说：“物体建筑排斥你，因为你必须置身于它们之外才能欣赏它们。”。“我想让人们感到受欢迎，让它成为城市中真正的地方。”

Ronan specified Jet Mist granite as a nod to the conventional trappings of Class A lobby space, but eschewing what he calls the “mausoleum-like” feel of many tower lobbies, he chose three finishes—sandblasted, flamed, and honed—to make it less formal. The core is clad in sandblasted mirror-finish glass to reflect the birch trees and the daylight from full-height windows at the end of each elevator bank.

“Object buildings exclude you because you have to be outside of them to appreciate them,” Ronan says. “I wanted people to feel welcome, and to have it be a real place in the city.”

项目名称：

151 North Franklin，Chicago

客户/业主：

John Buck公司

设计建筑师/室内设计师：

John Ronan Architects，芝加哥。约翰·罗南，FAIA（负责人和首席设计师）；

Marcin Szef，美国友邦保险协会，Sam Park，Eric Cheng，Laura Gomez Hernandez（项目团队）

记录建筑师：

AAI Associates

M/E/P工程师：

环境系统设计

结构工程师：

Magnusson Klemenic Associates

土木工程师：

麦基顾问公司

岩土工程师：

GEI顾问

施工经理/总承包商：

Lendlease

景观建筑师：

沃尔夫景观建筑

照明设计师：

极光照明设计

垂直运输：

詹金斯和亨廷顿

代码/ADA顾问：

Jensen Hughes

声学工程：

Shiner+Associates

面积：

880000平方英尺

成本：

1.84亿美元（核心和外壳）

Project: 151 North Franklin, Chicago

Client/Owner: The John Buck Co.

Design Architect/Interior Designer: John Ronan Architects, Chicago . John Ronan, FAIA (principal and lead designer); 

Marcin Szef, Assoc. AIA, Sam Park, Eric Cheng, Laura Gomez Hernandez (project team)

Architect of Record: AAI Associates

M/E/P Engineer: Environmental Systems Design

Structural Engineer: Magnusson Klemencic Associates

Civil Engineer: Mackie Consultants

Geotechnical Engineer: GEI Consultants

Construction Manager/General Contractor: Lendlease

Landscape Architect: Wolff Landscape Architecture

Lighting Designer: Aurora Lighting Design

Vertical Transportation: Jenkins & Huntington

Code/ADA Consultant: Jensen Hughes

Acoustic Engineering: Shiner+Associates

Size: 880,000 square feet

Cost: $184 million (core and shell)