Construction Today - December 2017 - 20

more light and openness to these floors, and made these spaces
more appealing to tenants," Davis says. "We also created floor
openings throughout to support future tenant amenity spaces."
The original interior of the building was stripped back to its
steel structural columns and concrete slabs. "Beyond that, everything in that portion of the building is new," he adds.
The building's steel frame with concrete deck structure was
bolstered to handle the structural load from the eight new
stories. Several of the building's columns were reinforced with
concrete, and new footings and shear walls were added to its
foundation. In addition, the building's lateral bracing system was
removed and replaced with diagonal steel bracing.

'We are creating spaces that people will
feel more compelled
to move between.'
Coordinating the building's structural improvements proved
to be a significant challenge. "There was a carefully managed and
sequenced erection process that involved a lot of complex communication between the construction engineer and the engineer
of record," Davis says. "We had improvements that we planned
to make with steel, some with concrete and sometimes both. It
was a challenge to lay those out and get the rebar and couplers to
coordinate with the structural steel."

Building Features
The 390 Madison building has a glass curtainwall covering its
exterior, giving each office floor-to-ceiling glass. Sections of

20

CONSTRUCTION-TODAY.COM DECEMBER 2017


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Table of Contents for the Digital Edition of Construction Today - December 2017

Contents
Construction Today - December 2017 - Cover1
Construction Today - December 2017 - Cover2
Construction Today - December 2017 - 1
Construction Today - December 2017 - Contents
Construction Today - December 2017 - 3
Construction Today - December 2017 - 4
Construction Today - December 2017 - 5
Construction Today - December 2017 - 6
Construction Today - December 2017 - 7
Construction Today - December 2017 - 8
Construction Today - December 2017 - 9
Construction Today - December 2017 - 10
Construction Today - December 2017 - 11
Construction Today - December 2017 - 12
Construction Today - December 2017 - 13
Construction Today - December 2017 - 14
Construction Today - December 2017 - 15
Construction Today - December 2017 - 16
Construction Today - December 2017 - 17
Construction Today - December 2017 - 18
Construction Today - December 2017 - 19
Construction Today - December 2017 - 20
Construction Today - December 2017 - 21
Construction Today - December 2017 - 22
Construction Today - December 2017 - 23
Construction Today - December 2017 - 24
Construction Today - December 2017 - 25
Construction Today - December 2017 - 26
Construction Today - December 2017 - 27
Construction Today - December 2017 - 28
Construction Today - December 2017 - 29
Construction Today - December 2017 - 30
Construction Today - December 2017 - 31
Construction Today - December 2017 - 32
Construction Today - December 2017 - 33
Construction Today - December 2017 - 34
Construction Today - December 2017 - 35
Construction Today - December 2017 - 36
Construction Today - December 2017 - 37
Construction Today - December 2017 - 38
Construction Today - December 2017 - 39
Construction Today - December 2017 - 40
Construction Today - December 2017 - 41
Construction Today - December 2017 - 42
Construction Today - December 2017 - 43
Construction Today - December 2017 - 44
Construction Today - December 2017 - 45
Construction Today - December 2017 - 46
Construction Today - December 2017 - 47
Construction Today - December 2017 - 48
Construction Today - December 2017 - 49
Construction Today - December 2017 - 50
Construction Today - December 2017 - 51
Construction Today - December 2017 - 52
Construction Today - December 2017 - 53
Construction Today - December 2017 - 54
Construction Today - December 2017 - 55
Construction Today - December 2017 - 56
Construction Today - December 2017 - 57
Construction Today - December 2017 - 58
Construction Today - December 2017 - 59
Construction Today - December 2017 - 60
Construction Today - December 2017 - 61
Construction Today - December 2017 - 62
Construction Today - December 2017 - 63
Construction Today - December 2017 - 64
Construction Today - December 2017 - 65
Construction Today - December 2017 - 66
Construction Today - December 2017 - 67
Construction Today - December 2017 - 68
Construction Today - December 2017 - 69
Construction Today - December 2017 - 70
Construction Today - December 2017 - 71
Construction Today - December 2017 - 72
Construction Today - December 2017 - 73
Construction Today - December 2017 - 74
Construction Today - December 2017 - 75
Construction Today - December 2017 - 76
Construction Today - December 2017 - 77
Construction Today - December 2017 - 78
Construction Today - December 2017 - 79
Construction Today - December 2017 - 80
Construction Today - December 2017 - 81
Construction Today - December 2017 - 82
Construction Today - December 2017 - 83
Construction Today - December 2017 - 84
Construction Today - December 2017 - 85
Construction Today - December 2017 - 86
Construction Today - December 2017 - 87
Construction Today - December 2017 - 88
Construction Today - December 2017 - 89
Construction Today - December 2017 - 90
Construction Today - December 2017 - 91
Construction Today - December 2017 - 92
Construction Today - December 2017 - 93
Construction Today - December 2017 - 94
Construction Today - December 2017 - 95
Construction Today - December 2017 - 96
Construction Today - December 2017 - 97
Construction Today - December 2017 - 98
Construction Today - December 2017 - 99
Construction Today - December 2017 - 100
Construction Today - December 2017 - 101
Construction Today - December 2017 - 102
Construction Today - December 2017 - 103
Construction Today - December 2017 - 104
Construction Today - December 2017 - 105
Construction Today - December 2017 - 106
Construction Today - December 2017 - 107
Construction Today - December 2017 - 108
Construction Today - December 2017 - 109
Construction Today - December 2017 - 110
Construction Today - December 2017 - 111
Construction Today - December 2017 - 112
Construction Today - December 2017 - Cover3
Construction Today - December 2017 - Cover4
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http://digital.construction-today.com/nxtbooks/phoenix/ct_201108
http://digital.construction-today.com/nxtbooks/businessmedia/ct_201107
http://digital.construction-today.com/nxtbooks/businessmedia/ct_201106
http://digital.construction-today.com/nxtbooks/businessmedia/ct_201105
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