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mynameis
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Grit1645
Nov 20 2008, 01:08 PM
JFK is right, mynameis. The columns were not encased, nor were they filled. The hollow section just remained hollow after they were in place. In general, the column fireproofing seems to have consisted of several layers of drywall.
Evidence of this being a non HSS building is from? NIST? UL? 911 Commission?
Edited by mynameis, Nov 20 2008, 02:37 PM.
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Core Columns Design · World Trade Center