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Coatesville in Chester County, Pennsylvania — The American Northeast (Mid-Atlantic)
 

The Making of the Trees

 
 
The Making of the Trees Marker image. Click for full size.
Photographed By Devry Becker Jones (CC0), September 4, 2022
1. The Making of the Trees Marker
Inscription.  
The project to make and roll the steel that went into the World Trade Center began in 1967. The steel for the bases of Towers 1 and 2 had to be able to support incredible loads, Lukens was chosen due to their expertise in the production of small-batch specialty steels.

The process started with scrap entering the plant via truck and train. It was selected and sorted according to the particular "recipe" to produce steel with the necessary properties of strength and flexibility, as determined by Lukens' engineers.

The scrap was then melted in the electric arc furnace, and poured into molds forming ingots. These ingots were then sent to the rolling mill, where they were reheated and rolled to the proper thickness.

The steel plates were then sent to Plant 5, where they were flame cut into the distinctive "tree" shape. The finished trees were then shipped for final assembly by Pittsburgh-Des Moines.

The trees were made, rolled and welded in 1968 and 69, and shipped to New York via rail. The massive trees, up to 70 tons, spanned the first nine floors of the World Trade Center towers. The buildings
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were completed in 1971, standing 1,350 feet or 110 stories tall, and stood until the tragic day in September, 2001.
 
Erected 2014 by The National Iron & Steel Heritage Museum.
 
Topics. This historical marker is listed in these topic lists: Industry & CommerceNotable BuildingsRailroads & Streetcars. A significant historical month for this entry is September 2001.
 
Location. 39° 58.867′ N, 75° 49.408′ W. Marker is in Coatesville, Pennsylvania, in Chester County. Marker can be reached from South 1st Avenue south of Dr. Martin Luther King Jr. Boulevard, on the right when traveling south. Touch for map. Marker is at or near this postal address: 52 S 1st Ave, Coatesville PA 19320, United States of America. Touch for directions.
 
Other nearby markers. At least 8 other markers are within walking distance of this marker. 9/11 Tragedy (here, next to this marker); The Return of the Trees (here, next to this marker); a different marker also named The Return of the Trees (here, next to this marker); The Future of the Trees (here, next to this marker); Arcelormittal Plate LLC World Trade Center (a few steps from this marker); The Lukens Mill - Early 1900s (within shouting distance of this marker); The Modern Mill (within shouting distance of this marker); The Lukens Mill - Late 1800s (within shouting distance of this marker). Touch for a list and map of all markers in Coatesville.
 
The Making of the Trees Marker image. Click for full size.
Photographed By Devry Becker Jones (CC0), September 4, 2022
2. The Making of the Trees Marker
 
 
Credits. This page was last revised on September 7, 2022. It was originally submitted on September 7, 2022, by Devry Becker Jones of Washington, District of Columbia. This page has been viewed 62 times since then and 4 times this year. Photos:   1, 2. submitted on September 7, 2022, by Devry Becker Jones of Washington, District of Columbia.

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Feb. 24, 2024