Category Archives: Projects

Projects

1 Flatbush Ave, Downtown Brooklyn

Featured Project: 1 Flatbush Ave, Downtown Brooklyn

Project Type: New Construction

Services: Vibration Monitoring, Existing Conditions Documentation, NYCTA Tunnel Monitoring

We partnered with our client, Slate Property Group, to provide a variety of services at 1 Flatbush Ave in Brooklyn, NY. The property is a 19-story, 183-unit rental building on a wedge-like site location. Slate Property Group designed a stunning contextual building that includes a large, three-story, double-height retail base perfect for this corner site. Slate turned to us for a combination of services.

Prior to the start of excavation, our team installed Wireless Vibration Monitors in the surrounding buildings and subway tunnels, adjacent to project, to ensure that every structure was protected as per the New York City DOB code. With our real-time notification system, our clients receive alerts if established vibration thresholds are exceeded. This system was put into place at this location.

Our team also performed Existing Conditions Documentation in all buildings involved. This photographic inspection provides our client with evidence of existing conditions in the structures involved, including any existing damage that may be present.

Since 1 Flatbush Ave. is located between 2 NYC Transit Tunnels, our team also installed seismographic monitoring equipment in both adjacent subway tunnels to monitor tunnel vibrations, using our manned services. In addition, we provided crack gauge & tell-tale monitoring, optical structure surveying in adjacent properties and subway tunnels, and level line surveys in the subway tunnels.

With manned monitoring, our technician is always on site to inform the Superintendent and MTA inspector immediately, in the event vibration levels are exceeded.

Saltus LLC is involved in every aspect of the development process, ensuring that our clients, are in compliance with New York City construction standards.

 

Projects

321-325 W 35th Street, New York, NY

Project Spotlight: 321-325 W 35th Street, New York, NY

LIST OF SERVICES:

– Crack Gauge/Telltales Installation and Monitoring
– Real Time Vibration Monitoring (seismographs)

Saltus was hired for services related to foundation work for a commercial project located at 321-325 West 35th street, between 8th and 9th Ave in the Hell’s Kitchen section of Midtown Manhattan, south of Times Square. Their services were conducted over a 16-month period. Services included crack gauge/telltale monitoring, installation of seismographs and real time vibration monitoring for the duration of the project.

saltus, Knickerbocker Hotel, Hilton Garden Inn, Times Square, vibration monitoring, NYC
Projects

136-140 W 42nd Street, New York, NY

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Project Type: New Construction – Foundation Work

 LIST OF SERVICES​​:

  • Crack Gauge Monitoring
  • Existing Condition Photographic Documentation –​ NYCTA S Shuttle Subway Line
  • Manned Seismic Monitoring
  • ​​Real Time Vibration Monitoring

Saltus was contracted to perform a variety of services related to the new construction of the Hilton Garden Inn Hotel located at 136-140 West 42nd Street in the heart of Times Square, in NYC. The 175,000 sq. ft. hotel is located next door to the historic Knickerbocker Hotel, with 35 hotel floors plus 3 floors of retail space. The building is a concrete flat plate structure. The hotel is in close proximity to major Times Square and Midtown Manhattan attractions and was designed to overlook Times Square attractions, including the New Year’s Eve ball drop.

We performed services related to the foundation portion of the project as required by the NYC DOB code and NYCTA. This included both monitoring services for both subway tunnels and because of requirements regarding adjacent landmark building districts.

For the NYCTA subway tunnels, we provided Existing Conditions Survey/Photographic Documentation services. We also installed crack gauge monitors and provided monitoring services in the Subway tunnel.

For required vibration monitoring, we installed seismic monitoring equipment and provided Manned Seismic Monitoring (continuous) and Real Time Vibration Monitoring for the duration of the project.

 

Projects

51 Jay Street, Brooklyn, NY

Featured Project: 51 Jay St, Brooklyn, NY

Project type: Major Renovation, Demolition, Addition 

Services: Pre-construction survey, Existing Conditions Photographic Documentation, Seismic Monitoring, Vibration Monitoring, Crack Gauge Monitoring, Subway Tunnel Monitoring

Our client hired us to provide services at their construction project located at 51 Jay Street in the DUMBO historic district in Brooklyn, NY. The property is a landmark building and was remodeled by the client. The building now houses condominiums.

Saltus LLC performed a pre-construction survey on an adjacent building located on Water Street prior to the start of the project. We also performed vibration monitoring at the site to preserve the historic facade façade of the building.

The project included additional services related to the east (Manhattan bound) subway tunnel adjacent to the construction site.

Services were conducted for the duration of the 15-month long project.

Some details of the work include the following:

  • Wireless vibration monitoring was completed on the façade of the building from the top floor to the basement during the demolition and construction phases. Included real time monitoring and notification services.
  • A crack gauge monitor was placed on the façade of the building, on the northwest corner of the site.
  • Our work in the subway tunnel included both photographic surveying as well as vibration monitoring for the Manhattan-bound subway tunnel running under the East River. For this project, our team installed seismic monitoring equipment in the tunnels located 10 flights below ground.
  • Our services included manned monitoring with on-site technicians.
Projects

High Line, New York, NY

Saltus LLC provided its Monitoring Services during a reconstruction phase of this highly acclaimed New York City linear park and urban design located in Midtown’s West Side, Manhattan.