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Unitized Systems Are Raising the Level and
Complexity of Curtain-Wall Design
Factory-built components let architects achieve the quality clients now demand
[ Page 3 of 8 ]

By Sara Hart

 

 

Burberry, New York City

At the Seele factory in Gersthofen, Germany, architects, engineers, and fabricators collaborated to detail the metal-mesh sections (right, far right). Eventually, the mesh was changed from steel to aluminum to reduce the weight of the wall. Seele determined that X-bracing (above) was needed to stiffen the members. The team built prototypes to study the connections.

 

The architects evaluated different ways the two buildings could be combined to meet the client’s growing needs. The resulting feasibility study summarized five options, ranging from the demolition of the existing buildings and the construction of a new medium- to high-rise tower to a minor renovation that would leave the dividing party wall intact. Analysis showed that a new building would require a long construction schedule and high capital expenditures. Due to a compressed time frame, the architects ruled out razing the stores and chose to perform a radical renovation instead, which included demolishing the structural masonry party wall and replacing it with a series of steel columns and beams to support the new floors. The redundancy of services—elevators, stairwells, bathrooms, and storage—could then be eliminated, capturing more square footage for the sales floors.

 

Gensler created a refined, layered facade for the Burberry flagship store in Midtown Manhattan out of Magny stone, clear glass, and bronze-colored aluminum. The partially unitized curtain-wall grid was manufactured in a factory in Germany (above).

 

Finally, with a plan to fuse the existing buildings into one, the architects could turn their focus onto creating a refined but visually animated facade. The complexity of this problem cannot be overstated. In typical New York infill buildings, the facade is often a generic curtain wall that repeats the rhythms of its neighbors and addresses the streetscape with varying degrees of distinction. Because of the stature of the client, Gensler’s mandate was more difficult. For Burberry, company image and urban context had to blend effortlessly.

 

[ Page 3 of 8 ]

 

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