East Side Access Concourse & Facilities Fit-Out

Tectonic provided environmental compliance, special inspections and materials testing services for construction of the first phase of Grand Central Terminal Concourse & Facilities Fit-Out. At an estimated cost of $47M, CM014A involved the fit-out of the lower portion of the new LIRR concourse located in the lower level of Grand Central Terminal, construction of south sub-station facility, fit-out of shaft #2, electrical installation for north substation and US-3/US-4 unit substations, construction and fit-out of Terminal Management Center (TMC) and construction of certain rooms adjacent to the south substation and TMC.

Scope of work included:

  • Subway roof closure work and modifications to the existing air tunnel.
  • Slab on grade concrete placement
  • CMU wall, door frame and concrete header construction.
  • MV transformers and unit substation components.
  • Air handling units.
  • Work on 43rd Street garage to prepare for electrical service work.
  • Demolition of vibration walls.
  • Modifications to the existing air tunnel.
  • Excavation for the sub-grade MEP utility ductbanks, manholes and hand holes.
  • Installation of sub-grade utility structures, including sediment manholes, sanitary drainage piping and ductbanks.
  • Waterproofing, formwork, rebar installation and concrete placement for column footings, ductbanks and structures (air tunnel, sewage ejector pit).
  • Removal of excavation/demolition materials.

CM014B included the construction of the future 370,000 sq. ft. LIRR Concourse at Grand Central Terminal. The $100M+ contract involved structural, mechanical and electrical fit-out of the Concourse and existing 44th Street and 50th Street Ventilation Facilities, construction of internal connections form the LIRR Concourse to Grand Central Terminal, excavation and structural lining of the 48th Street Entrance, etc.

As sub-consultant to Yonkers Contracting, Tectonic provided environmental engineering services as required by the project specifications calling for the proper identification and classification of types of wastes being generated and how the different types of waste are to be managed. Tectonic evaluated the analytical data and prepared reports with recommendations for management of excavated spoils and requirements for off-site disposal. Work included development of a Field Sampling Plan (FSP), development of laboratory testing program to characterize the onsite stockpiled soils, obtaining field samples for laboratory testing including field screening with a photo ionization detector (PID) to check for Volatile Organic Compounds (VOC) and preparation of a final report to document results of investigation.

Special inspections and materials testing responsibilities included technical oversight of construction, and QA/QC materials testing of concrete, shotcrete, structural steel, masonry, utility relocations, liner and interior structures, electrical and mechanical systems, decking, etc. Compaction testing and back fill placement included gradation analysis, Atterberg limits, density, and moisture content. Other duties included preparation of daily, weekly and monthly inspection reports, attendance at progress meetings and liaison with MTA.

Pulaski Skyway Rehabilitation

Tectonic has provided Construction Engineering and Design of Demolition Operations services for the major rehabilitation of the Pulaski Skyway in Northern New Jersey. The four-lane bridge-causeway has a total length of 3.5 miles and travels between Newark and Jersey City. As of 2014, the bridge handles about 74,000 crossings a day. Work was performed under several contracts, including:

Contract 2, Rehabilitation of Route 139 Hoboken and Conrail Viaducts

Tectonic provided design of demolition operations for the reconstruction of the Hoboken and Conrail Viaducts along with 7 cross street bridges.

Contract 3, Routes US 1 & 9 Deck Replacement

Tectonic provided engineering, calculations and drawings for steel repair for this project. Additionally, Tectonic design the steel plates required for diving construction equipment over the deck panels that had not adequately cured and for expansion joints.

Contract 4, Routes US 1 & 9 Deck Replacement

Tectonic design temporary supports for the deck replacement of the Pulaski Skyway including providing calculations and drawings for splicing the main cross beams in order to configure construction staging to avoid full closure of the viaduct.

Interchange 14A Improvements

Tectonic provided Construction Engineering and Structural Engineering for this toll plaza widening project that required the demolition of an existing Toll Station Building. Tectonic designed all temporary supports (props, steel frames etc.), their connections to the existing structure and provided the construction sequence required for the reconstruction of the toll station building. Tectonic also verified the existing structure capacity after removal of the West walls of the building, part of the roof and the structural slab for all temporary construction loads.

The proposed improvements project consists of widening the toll plaza from 11 lanes to 12 lanes and replacing a 2-lane connector bridge to a 4-lane structure. A new flyover ramp will also be constructed and the traffic signal at East 53rd Street will be eliminated.

New Cadet Barracks at U.S. Military Academy

Tectonic provided geotechnical, civil and structural engineering as well surveying, construction inspection and construction monitoring during the construction phase of this new $186 million, 287,000 SF barracks that will house 650 cadets.

Sited into the side of a steep hill close to existing buildings, including the historic West Point Chapel, the project required rock cuts up to 80 ft. high and nearly 150,000 cubic yards of rock blasted and removed from the site.

Tectonic performed value engineering of the original rock support design and provided recommendations to mitigate effects of blasting, including the development and execution of an instrumentation monitoring program and associated special inspections. Additionally, Tectonic’s civil engineers developed a construction plan for the shotcrete treatment of the rock face that had been scanned using 3D LiDAR technology by the firm’s surveying team. Surveying services continued throughout construction with particular attention to monitoring during blasting.

Tectonic ultimately provided additional inspection services to monitor drainage, utilities, grading, building foundation and superstructure construction.

MTA East Side Access Conveyor System

East Side Access, a $7 billion MTA project underway in NYC, will connect the Long Island Rail Road’s (LIRR) Main and Port Washington lines in Queens to a new LIRR terminal beneath Grand Central Terminal in Manhattan. The new connection will increase the LIRR’s capacity into Manhattan, shorten travel time for commuters, and provide a new commuter rail station in Sunnyside, Queens and under the Grand Central Terminal.  To support the new connection, Tectonic provided structural engineering and special inspection services on a multi-year contract for various phases including the Manhattan Tunnel, Harold Interlocking Structures and Grand Central Station. Construction design support services included structural and geotechnical design of temporary facilities including preparation of footing design plans for conveyor system to disposal of tunnel muck that included an enclosed steel truss spanning 120 ft. across Northern Boulevard.