Contractors World International Vol 6 No 1
ocated in New York, USA, Pier 40, is the largest
pier structure on the Hudson River. Today, this
historic structure is owned by the Hudson River
Park Trust and Pier 40 is home to athletic fields and admin-
istrative offices. The perimeter of the property is surround-
ed by over 1 million square feet (92,900 m²) of commercial
parking and is one of Manhattan’s largest parking facilities.
When the Hudson River Park Trust inherited the pier,
it came with a number of structural issues. Sections of the
roof had deteriorated significantly as a result of delayed
routine repairs, leakage, and spalling concrete. In addition,
portions of the parking garage were closed to ensure pub-
lic safety , thereby reducing the park’s operating revenue.
Because of the size of the facility and the need to keep
it operational, the Hudson River Park Trust addressed re-
pairs in a phased approach. The company STRUCTURAL
was awarded the contract for Phase 2 of the parking deck
Working together with the consulting engineers,
had crews remove the existing top slab of the parking deck
along with the existing waterproofing, pitching slab, and all
electrical and plumbing systems associated with the area.
This exposed an unforeseen challenge. The surface of
the existing precast planks underneath had a thin layer of
cementitious material. This thin layer would not provide a
solid surface for the new waterproofing system to hold on
The team came up with the solution to hydroblast the
deck in order to prepare the area. The contractor then in-
stalled hot applied waterproofing on precast planks and a
pitched concrete topping.
Crews were then able to repair the existing precast con-
crete channels, ribs, and floor spalls using repair mortar.
They also installed a LED light system on the middle level of
the parking deck, providing the area with the most energy
efficient light fixtures with the required illumination levels
based on local standards.
Throughout the project, debris
had to be contained and kept
away from the water – posing lo-
gistical challenges. The contrac-
tor had to transport waste and
Pier 40, New York photo: Joe Mabel
Parking Deck Repairs at
New York’s Pier 40
Crews had to remove the
existing top slab of the park-
ing deck along with the
existing waterproofing sys-
tem to prepare a surface for