Gistok, just so you know, I'm the researcher that found most of the heights that are on Emporis, and that's where wiki got their heights from. Again, I got the heights directly from the the building managers from elevations/prints for the Guardian, Penobscot, Comerica, and RenCen, specifically. Mechanical penthouses and elevator shafts are included in total structural height on Emporis, and when there are two different elevations, the height is taken from the lowest entrance/side, with a note given for the higher entrance/side. I really don't know what else to tell you than that the for-pay Emporis site shows more detailed heights, which, as an editor I have access to.
The Guardian main roof lies at 397 feet, the south tower roof lies at 423'-10" and the north tower roof at 482". There is a mechanical penthouse level on the north roof that officially raises the height to 495'-6".
The 565 feet for the Penobscot is measured to the roof of the penthouse, and more specifically, to the penthouse roof parapet wall.
The Marriott RenCen measures exactly 727 feet to the mechanical penthouse roof as measured from the back wintergarden entrance.. It measures 747 feet from it below grade basement, but buildings are never officiall measured from the below-grade levels.
The Comerica's Tower 619 feet measurement is measured to the structural top, which are the decorative spires. The actual roof lays at 606'-6".
I've spent a ridiculous amount of free time researching Michigan high-rise stats. I've found that most have been listed higher than they really are.
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