This is a section from the girders that were part of the World Trade Center that were given to the City of Christchurch to honour firefighters all over the world. The text of the memorial plaque is below:
"This sculpture within the Firefighters Reserve stands as a silent tribute to firefighters worldwide who risk their lives daily in the pursuit of their duty.
Firefighters are always in the front line and never more so than on September 11, 2001, when international terrorists hijacked four domestic American Jet airliners and flew two of them, along with their passengers, into the twin towers of New York's World Trade Center. The two towers imploded and collapsed, and among the more than 2,800 dead 343 New York firefighters. All that remained of the twin towers, and the lives lost within, was a mountainous pile of twisted steel and smoking rubble.
In May 2002, five steel girders, weighing 5.5 tons were salvaged from the site of the World Trade Center and gifted to the City of Christchurch by the City of New York for use in a public art work to honour all firefighters worldwide. The suspended component or "spear", in its red hot state, fell from the 102nd floor of the World Trade Center Tower Two, piercing the subway below."