• Corporate HQ, NY
  • Melville, NY
  • Iselin, NJ
  • Ossining, NY
  • Mount Laurel, NJ

NYSTA Bridge and Ancillary Structure Inspections


 


HAKS, as a major subconsultant, is providing a team leader and an assistant team leader to perform bridge inspections (biennial, interim, in-depth and special inspections) as well as culvert, overhead sign structure, high-mast lighting and communication tower inspections for NYSTA New York and Albany Divisions. Inspections comprise approximately 170 bridges (872 inspection spans), 140 overhead sign structures and high-mast light towers, and 10 communication towers. Major spans include the Tappan Zee Bridge, Castleton-on-Hudson Bridge, Kaaterskill Creek Bridge, Catskill Creek Bridge and Normanskill Creek Bridge.

On the Tappan Zee Bridge, we performed inspections for 21 fracture-critical deck truss approach spans. In the course of the inspection, our team identified several critical cracks in the floorbeam truss gusset plates, advanced section loss and large perforations in the gusset plates throughout, issuing any necessary structural flags. We also identified a pattern of coped web shear cracks in the newly installed deck floor beams. This was later identified as a design flaw triggering a massive retrofit action by NYSTA engulfing the majority of these members with similar connection details, load paths and under similar live loads.

HAKS conducted confined space inspections as well as in-depth inspections that included data-collection (mapping and soundings of deteriorated concrete) on culverts and bridges. MPT was required for inspections in highly urbanized areas of the Thruway south of the Tappan Zee Bridge.

Each team was equipped with an inspection van with laptop computers, wireless Internet connection, GPS units, D-meters, digital cameras, printers, scanners, dye penetrant test kits, ladders and safety equipment.