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Original Design
 United Nations Building Capital Master Plan
Our most recent project, awarded in June 2001, consists of a six-year
implementation of a master plan to upgrade and modernize the
entire four million square foot complex.
General Assembly Hall  General Assembly Hall Chiller Plant Upgrade
Syska Hennessy Group performed an evaluation of alternatives to
eliminate the use of CFC refrigerants for cooling the Secretariat
Building. Chiller conversion, drive line retrofit and chiller
replacement were evaluated. The study determined that when compared
to replacing the two 1270-ton steam turbine drive chillers, over
$1,000,000 could be saved by installing one new 1800-ton unit
and converting one chiller to R-134a. Furthermore, the study
recommended replacing the chilled water pumps with new VFD units
better suited to the operating requirements. The new pumps will
reduce pumping costs by more than $60,000 per year. Syska Hennessy
Group subsequently designed the recommended upgrades and they
will be implemented in winter 1996.
In 1993, the mechanical and electrical design for the United Nations
Newsstand was prepared by our office. The project included the
provision of the mechanical and electrical services required for
the construction of a 600 square foot Newsstand.
In 1991, Syska Hennessy Group prepared the mechanical and electrical
drawings and specifications required as part of the Medical Department
Renovation on the fifth floor of the Secretariat Building. The
renovation includes the upgrade and/or replacement of the existing
mechanical, electrical and plumbing systems on this floor. Existing
services and operation to remain were incorporated within this
project so as to minimize interruption.
Also in 1991, Syska Hennessy Group provided design for the mechanical
and electrical systems for the renovation of the 6th and 7th floor
of the Headquarters Building. The renovation included new open
and private offices, copy rooms, conference rooms, etc. to be integrated
with existing operations. Supplemental air conditioning was provided
in critical areas or as required to facilitate off-hour operations.
In 1989, our office prepared the design of an extensive modernization
of the main electrical distribution equipment serving various regions
of the Headquarters Building. The project's design and construction
were phased such that interruptions to normal facility operations
were minimized and/or eliminated.
In 1983, Syska Hennessy Group prepared Contract Documents for
various upgrades of the existing electrical system throughout the
entire Secretariat Building. Work included the replacement of existing
electrical feeders, panels, etc. throughout the facility as well
as the provision of new power circuiting on most floors.
Security and Strengthening
The United Nations has engaged Syska Hennessy Group for the enhancement
of the security systems present at the campus. Performing as
Prime Consultant for the Construction Administration of the project,
Syska Hennessy is overseeing a team of sub-consultants that includes
architects, security consultants, lighting designers and structural
engineers as part of this effort.
The high profile and historic nature of this large project as
well as the technical planning and challenges have made the communication,
coordination and teamwork between all of the project team members
vital to the success of the project. There are critical budget
and timing issues which also create a challenging atmosphere.
For obvious reasons, beyond the basics, the details of this project
are confidential.
United Nations Memorial
Syska Hennessy Group provided MEP consulting engineering services
for the construction of a United Nations Peace Keeper Memorial.
The memorial consisted of a glass wall, a reflection pond and decorative
lighting. The glass wall lists the quote “Remember here those
who gave their lives for peace”, in the six languages of
the United Nations. The reflection pond and walkway was built using
stones with each stone representing a member nation. The memorial
is supported by a below grade vault which houses electrical and
plumbing services. Services to the memorial were derived from the
North lawn building. Construction was completed in the Fall of
2003.
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