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The final steel beam of a new downtown building on top of an existing 10-story parking garage was put in place Thursday.

Delayed by high winds on Wednesday, a crane lifted the beam from the street to the roof of the parking garage on Michigan Avenue and Griswold. The garage is adjacent to the Westin Book Cadillac Hotel and Residences.

The beam is for the frame of The Griswold, which is the first new construction of downtown housing in nearly 25 years, according to the developers. It’s also the first project in a very long time to be built atop an existing structure, which is more common in denser cities.

Planning for the project started in 2006 when the garage was built for the renovated Book Cadillac, which underwent a $200 million overhaul after standing empty and decaying for decades. But the recession delayed the rooftop apartment project.

The Griswold is part of the Capitol Park historic district, named for the triangular park one block away. The apartment complex will have one-, two- and three-bedroom units ranging from 750 square feet to 1,600 square feet.

Upscale housing is in big demand in “greater downtown” — a 7.2 square-mile area of the city that includes downtown, the east riverfront, Midtown, Eastern Market, Lafayette Park, Woodbridge and Corktown.

laguilar@detroitnews.com

Twitter: LouisAguilar_DN

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