NJDOT Sign Structure Replacement

Initiated by the Bridge Management system, this project includes the removal of existing sign structures and replacement with new sign structures that meet all current standards.

Big Apple Group provides construction monitoring services such as Pre and Post-Construction Surveys, Optical Monitoring, and Vibration Monitoring and for J. Fletcher Creamer & Son, Inc. of Hackensack, NJ for the properties adjacent to Tulip Road and Phillipsburg-Newark Expressway.

Big Apple Group will perform a Pre and Post Construction Existing Conditions Survey to document, by digital photography and/or video, the current cosmetic and structural conditions of portions of the interior and exterior of the existing adjacent residential structures, commercial structures, in ground pools, and attached decks.

Prior to mobilization, excavation or vibration induced activities, Big Apple Group shall measure the ambient vibration levels. Our seismographs will measure and record peak particle velocities and
frequencies, in accordance with the specifications/plans and parameters set forth our monitoring
plan. “Telltales” also known as crack gauges will be installed and monitored on any open joints in the permanent structures on neighboring properties, if necessary.

Baselines have been established along the perimeter of the site to be utilized for the duration of the monitoring. Points have been set on the existing structures at key locations. Big Apple will return to the site to obtain horizontal and vertical measurements for the settlement prisms set in the initial visit as frequently as specified by the project documents.

Vibration monitoring will be performed continuously using threshold‐type and fully automated seismographs. The systems are be equipped with a cellular modem to provide automated data reporting and notifications. Seismograph monitoring vibrations will provide data in relationship to buildings further away from the construction or source of vibration since the magnitude of vibration will decrease as the distance from the source increases. This limits the need for vibration monitors in all buildings while providing monitoring for possible damaging vibrations.

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