Peb tsim ntau yam ntawm corten steel vaj ntug khoom uas yooj yim rau nruab, zoo nkauj txaus nyiam, hnav thiab pheej yig. Txawm hais tias koj xav tsim kom muaj thaj chaw ntshiab, ncaj-edged nyom uas yooj yim rau kev tswj hwm, los yog ib qho ntawm cov kab nkhaus terraced paj txaj, koj tuaj yeem ua qhov no sai sai, yooj yim thiab pheej yig siv AHL's underground thiab saum toj no-av corten steel vaj npoo tov.
Nyob rau xyoo 1930, US Steel tau tsim cov hlau alloy rau sab nraum zoov uas tsis tas yuav tsum tau pleev xim. Nws tau hu ua Corten steel. Lub vaj npoo ua los ntawm cov hlau zoo sib xws yog ib feem tseem ceeb ntawm peb cov khoom lag luam. Cov hlau yog tsim los kom tau txais ib qho zoo nkauj patina nyob rau hauv ib lub sij hawm luv luv, thiab qhov nto xeb tuaj yeem tiv thaiv cov hlau los ntawm kev xeb ntxiv. Siv peb cov weathered steel trim, koj tuaj yeem tsim lub txaj paj zoo nkauj, thaj chaw nyom, txoj kev hauv vaj thiab tsob ntoo ib puag ncig uas yeej sawv kev sim ntawm lub sijhawm. Tag nrho peb cov huab cua huab cua puag ncig tuaj nrog 10-xyoo lav, tab sis nrog kev tu thiab saib xyuas me ntsis, nws yuav tsum nyob twj ywm hauv qhov zoo rau ntev dua li ntawd: tej zaum 30 lossis 40 xyoo!