Proj Overview

Project Overview

Mott Haven electric substation located in a dense urban section of the Bronx, N.Y. was built on a very tight schedule. The four-story, 125,000-square-foot all-precast concrete structure features a combination of precast concrete structural and architectural elements that help blend the massive structure with the urban neighborhood and visually downsize its massive size. The result is a substation that presents a believable residential presence such as a classic New York City rowhouse street.

Precast Solution

The building features a precast concrete structural system consisting of beams, columns, double tees and other components. The exterior is clad with precast concrete panels, which were insulated with 2-inches of insulation where they are adjacent to interior working spaces.

The precast concrete system was chosen due to its speed of construction and ease in sequencing sections, so equipment could be installed on a rapid schedule. Fire separations and durability also favored the precast option.


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Project Team


The Switzer Group Inc., New York


Kline Engineering, Farmingdale, N.Y.

General Contractor

D’Onofrio General Contractor Corp, Brooklyn, N.Y.


Con Edison Co. of New York, New York


Coreslab Structures (CONN) Inc., Thomaston, Conn.

Subcontracting Precaster

J.P. Carrara & Sons, Middlebury, Vt.

Subcontracting Precaster

William E. Dailey Precast LLC, Shaftsbury, Vt.

Subcontracting Precaster

David Kucera, GFRC, Gardiner, N.Y.

Precast Specialty Engineer

LEAP Associates International Inc., Tampa, Fla.

Key Project Attributes

  • Precast concrete system sped construction, with a number of precasters contributing components.
  • Fast construction of building shell allowed access for interior trades faster to install complex equipment, speeding completion.
  • Inherent fire resistance aided necessary fire separations between electrical equipment rooms.
  • Durability and low maintenance keep long-term costs down.

Project/Precast Scope

  • 125,000-square-foot, two-story electrical substation.
  • 1,150 pieces of precast concrete, including wall panels, prestressed double tees, beams, columns, and fence posts.
  • 1,000-gallon retention tank for storm water also constructed of precast concrete.