by Nick St. Denis  
hanks to an unprecedented  
Through complex collaboration the design methodology for material  
façade overhaul, the Anthony J. between architects, engineers, con- selections and system approaches  
Celebrezze Federal Building in sultants and contractors, the existing such as venting and supplemental con-  
Cleveland can once again be comfort- 1967 stainless steel and glass skin was ditioning. “Climatic con-  
able in its own skin.  
stabilized as the inner component wall, siderations determine the  
The project team was asked to de- and more than 300,000 square feet of appropriate type of dou-  
sign and execute a complete re-clad of glass was clad around it.  
ble wall system, as there  
a 1960s high rise to improve its thermal  
The planning process began in 2009, are a wide range—each  
performance drastically,while meeting and construction was virtually com- with their own particular  
stringent federal blast-resistant guide- plete by the end of last summer.  
lines and maintaining sensitivity to the  
strengths and weaknesses,”  
he says. “Consideration  
original architectural aesthetic.  
One other small detail: It had to ac-  
NCohaErleassYoyungJ, poabrtner at Interactive of access for cleaning and  
maintenance of double wall  
complish all of this without displacing Design Architects, says double-skin systems is also critical from  
any of the 4,500 building occupants— design is“extraordinarily complicated,” project inception.”  
and its hundreds of weekly visitors— especially with an existing façade.  
throughout the entirety of the project.  
The GSA is the largest  
“The prediction of the impact of the building manager in the  
This was a tall task, but one the Gen- new cladding must be analyzed inte- U.S., but there wasn’t a  
eral Services Administration (GSA) grally with the internal environmental double-skin building in its  
and Interactive Design Architects, systems,” he says, noting that standard inventory prior to the Ce-  
along with a large handful of indus- THERM modeling, which analyzes lebrezze renovation, which  
try players, were more than willing to two-dimensional heat-transfer effects was overseen by general  
tackle. It would entail something the in building components, is insufficient. contractor DCK Corp.  
project team believes had never been “More advanced methods such as com- Young himself had worked with mul-  
done before: the retrofit application putational fluid dynamic analysis must tiple double-skins in the past and had  
of a sealed double-skin façade on a be undertaken.”  
highrise building.  
Young adds that these factors drive  
continued on page 66  
USGlass, Metal & Glazing | August 2016  
One-of-a-Kind Retrofit Gives  
Cleveland Highrise a Second Skin  
The Anthony J. Celebrezze Building,  
originally built in the 1960s, underwent  
a major facade renovation in which a  
whole new curtainwall was clad over  
the existing structure.  
Due to the nature of the installation,  
a custom hoist had to be built and a The south and west sides of the building used a different curtainwall system  
double decker swing stage used to than the north and east, so performance mock-ups were done on two different  
set in the lites from the outside.  
corners of the building prior to construction.  
August 2016 | USGlass, Metal & Glazing  
The ‘Why’?  
of the Project  
obert P. Theel, GSA chief archi-  
tect in the Great Lakes region,  
Rsays in the 1960s, the building  
was the largest in GSA’s inventory. Over  
the years, the façade deteriorated, and  
in the 1990s, some of the glazed pan-  
els came loose during a big windstorm.  
GSA temporarily fixed the units, but  
it became apparent a bigger solution  
would be required, particularly with  
newer requirements such as security  
and energy performance brought into  
We had the opportunity to do a final  
solution when the American Recovery  
Act of 2009 put forth the money for this  
project,” says Theel. “The approach al- The outer façade uses laminated insulating glass units with high blast  
ways had been: ‘How do we maintain capabilities, while monolithic laminated glass was installed on the original  
this very valuable asset in full occu- interior façade.  
pancy and operation, for blast mitiga-  
tion and greater energy efficiency?’”  
In the end, it turned out that we to thoroughly demonstrate to the GSA Putting Together  
didn’t have a lot of choices given the how it could work.  
full set of circumstances,” adds Chris “We spent a lot of time engineering  
Mourgelas, GSA project manager in the and proving it wouldn’t negatively im- which signed a teaming agree-  
Great Lakes Region. pact the building’s systems,” he says. ment with PDS-Micco JV 2, a prime  
the Pieces  
National Enclosure Corp. (NEC),  
The GSA considered tearing down During the process, consulting firm subcontract to DCK, installed the  
and replacing the existing façade, as Arup peer reviewed some of the work glazing. Intertech Design Inc., a sub-  
well as adding the new skin and then the designers were doing.  
sidiary of Curtainwall Design Con-  
later removing the old skin. Structur-  
One key factor that impacted not sulting, worked with the glazier on  
ally, logistically and due to cost con- only the pre-construction phase but shop drawings, and the project team  
siderations, these options were quickly also the actual on-site work was the executed performance mockups.  
The south and west sides of the  
Because the more than 50-year-old building used a different curtainwall  
structure had undergone slight shifts system than the north and east. This  
taken off the table.  
We ended up with the double façade  
for a number of reasons,” says Theel.  
building’s movement over time.  
Being a government project, there and modifications due to weather meant performance mock-ups were  
were inherently many hoops to jump factors such as wind, it isn’t perfectly done on two different corners of the  
through, in addition to the blast-resis- symmetrical. Therefore, measure- building.  
tant and design requirements that had ments of the connections between  
Oleh Szekera,senior project manager  
to be met. The GSA also worked with the outer skin and the original façade at NEC, says the curtainwall units on  
various historical preservation organi- weren’t consistent and required care-  
zations to ensure they met that criteria. ful field surveying.  
continued on page 68  
USGlass, Metal & Glazing | August 2016  
ditions,” says NEC president David  
Sauld. “And Lake Erie proved to be  
very challenging.”  
Approximately 60 to 75 people—a  
combination of glaziers and ironwork-  
ers—worked daily on the project be-  
tween day and night shifts, as the units  
The project required extensive collaboration among the project team and could only be set between 6 p.m. and 4  
occupants, as the building remained fully operational through the more than a.m. due to building occupancy.  
half-decade-long process.  
Day workers set anchors and per-  
formed prep work, and the night crew  
the north and east sides span between AThUe nbliaqstu-reatedIncusrttaainlwlall system hoisted and set the units.  
floor lines.“To design and install those,  
we had some tight tolerances to stay was heavier than the typical unit NEC SMmanoyofatchtorSs caonitlriibnugte to the com-  
within,” he says.  
commonly installs, but perhaps the  
The entire outer façade uses lam- most unique challenge was the instal- plexity and uniqueness of the Cele-  
inated insulating glass units (IGU), lation method used to set the units. brezze façade retrofit project. But the  
combining clear and low-E glasses,  
with high blast capabilities.  
Two sides of the building fea-  
Because of the nature of the dou- one detail that is cited repeatedly by  
members of the project team  
as being the most impres-  
The approach always had been:  
How do we maintain this very  
ture a graduated frit pattern on  
the glass; two sides do not.  
sive is that they were able to  
maintain business as usual  
within the building.  
We built out a variety of  
IGU makeups, trying to get rid valuable asset in full occupancy  
Occupant activity re-  
mained normal due to the  
extensive coordination  
among the various players in  
the project,and more impor-  
Robert P. Theel, GSA atanntstlyw,ewreitdhisthrueptteendaantt.tiTmenes-  
of the greenness in the glass,”  
says Young.“Between the low-E  
coating and mixing that with  
clear glass, we got to a formula  
that worked.”  
NEC began its portion of  
and operation, for blast mitigation  
and greater energy efficiency?’  
the work on the outer curtainwall in ble-wall, the glaziers couldn’t set the but worked cooperatively with the  
June of 2013. This was after install- lites from the inside. The project team project team throughout the half-de-  
ing the glazing on the inner wall in designed a custom hoist and used a cade span of work.  
late 2012-early 2013.  
The old windows on the original from the outside.  
façade were replaced with 255,000  
double-decker swing stage to install  
Scheduling was critical, and the  
fact that many of the floors and office  
The existing building had a track spaces required high-level security  
square feet of monolithic laminated system on the roof used for window clearance posed another challenge that  
glass, and NEC also installed 36,000 washing. The project team inspected had to be overcome. s  
square feet of light shelves and light the rails of the rig, and a Tractel hoist,  
custom-designed for the proj-  
The exterior skin consists of approx- ect, was mounted to the tracks.  
imately 3,600 units. The typical exte- Greg Beeche Logistics designed  
rior unit was nine feet, four inches by and manufactured the exterior  
N i c k S t . D e n i s is the  
assistant editor of USGlass  
magazine. He can be reached  
2 feet, six inches in size. Extrusions swing stages.  
were done with Aluminum Curtainwall  
“Obviously, working on the  
Systems Inc. The glass was supplied by exterior of the building, we  
PPG and fabricated by Tecnoglass.  
were subject to windy con-  
USGlass, Metal & Glazing | August 2016