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Page 18

Contractors World International Vol 6 No 1

L

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

restoration project.

Working together with the consulting engineers,

ExperionDesignGroup,theLongIslandofficeofSTRUCTURAL

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

to.

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.

Overcoming

Challenges

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

USA

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

restoration.