The spire's production was a joint effort between engineering firm ADP Group Inc., based in Terrebonne, Que. and New York-based DCM Erectors Inc.
The Quebec company helped produce a total of 18 steel pieces for the top of the new World Trade Center, the heaviest of which weighs close to 70 tons. The spire will be erected by the spring in order to complete the 1,776-foot high-rise.
"It signifies that we're back, we're better than ever, and it shows the resilience of not just New York, but also people in general," said Steven Plate, the director of post 9-11 construction at the lower Manhattan trade centre. "The spire is a candle on the cake."
Nine of the giant metal pieces were tugged into New York Harbor on a barge on Tuesday, marking the end of their 2,760-kilometre journey that began in Canada on Nov. 16.
The remaining nine pieces of the 408-foot, $20 million spire are being trucked in from Canada and South Plainfield, New Jersey, the location of another plant in the co-production.
With a beacon at its peak to ward off aircraft and LED lights in various colours, the spire will provide public transmission services for television and radio broadcast channels that were destroyed on 9-11 along with the towers.
The 6.4-hectare site is well on its way to reconstruction, with the 72-storey Four World Trade Center also going up within sight of the highest building.
Tenants for One World Trade Center's 3 million-square-feet of office space so far include magazine publisher Conde Nast and the federal General Services Administration.
On Tuesday, a visitor noticed graffiti on a rooftop girder, scrawled by a worker in the building that replaces the fallen towers as the dominant emblem of the New York skyline.
The words read: "Change is from within."