Page 66 - Modern Steel Construction (April 2019)

structurally sound

Anton Grassl
MAKING AN ENTRANCE

USING GRAPH PAPER to draw a building is typical. Using plates that matched the panel spacing of the curtain wall system,
graph paper to inspire a building is not. thereby eliminating additional aluminum mullions in the pro-
For the angular entry pavilion of the Exchange at 100 Federal cess. In addition, Cives located and oriented all plate members to
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Street in Boston, the design team of Perkins+Will (architect) and accurately maintain the 5 8-in. offset required by the curtain wall.
McNamara/Salvia, Inc. (engineer) did both. Where the vertical rib members were not oriented perpendicular
The sharply faceted glass and steel structure, inspired by a piece to the plane of the glass, the outside plate edge was chamfered
of folded graph paper, incorporates a grid of steel plate fabricated parallel to the glass plane.

by AISC member and certi ed fabricator Cives Steel Company– The Exchange at 100 Federal Street is one of this year’s AISC
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New England Division to achieve 75-ft main spans while also IDEAS Award winners. You can read about all of the winners—and
meeting the architectural vision of narrow members (less than 6 in. see plenty of amazing photos—in the May issue. And for more on
wide) with sharp edges. While the plate shapes required frequent the Exchange’s entry pavilion, see “Functional Folds” in the January
lateral bracing, this issue was addressed via additional steel bracing 2018 issue, available at www.modernsteel.com.

66 | APRIL 2019