Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.

Your browser appears to have cookies disabled. For the best experience of this website, please enable cookies in your browser

We'll assume we have your consent to use cookies, for example so you won't need to log in each time you visit our site.
Learn more

Tests cast doubt on original WTC fire spec

FIRE TESTS on the floor truss design used on the World Trade Center's (WTC) twin towers last week cast doubts on the original fireproofing specification They showed that the thickness of fire protection in the original design would have given only half the specified two hour fire resistance.