Prestressed steel khoom tau ua tiav zoo txij li xyoo 1950s ntawm lub xyoo pua xeem, muaj ob lub ntsiab lus tseem ceeb hauv nws txoj kev loj hlob. Ua ntej, lub zog ntawm cov khoom maj mam nce, kom txo qhov loj thiab qhov hnyav ntawm cov khoom siv prestressed, txawm tias txo qhov project nqi; Thib ob, los ntawm kev txhim kho lub zog, peb yuav tsum tau them sai sai rau kev tsim cov khoom siv nrog kev ua haujlwm siab tiv thaiv corrosion, txhawm rau txhim kho lub zog ntawm prestressed steel Cheebtsam thiab txuag cov nqi kho.
