Contemporaneous Structural Steel Specifications. Federal Building and Fire Safety Investigation of the World Trade Center Disaster.
Contemporaneous Structural Steel Specifications.
Federal Building and Fire Safety Investigation of the
World Trade Center Disaster.
Luecke, W. E.; Siewert, T. A.; Gayle, F. W.
NIST NCSTAR 1-3A; 86 p. September 2005.
World Trade Center; high rise buildings; building
collapse; disasters; fire safety; fire investigations;
terrorists; terrorism; steel structures; specifications;
steels; standards; structural damage; structural
This report reviews the contemporaneous (1960s era)
steel and welding standards used to construct the
110-story World Trade Center (WTC) towers. It describes
the major structural elements in the towers and the many
grades of steels relevant to the WTC investigation.
Although ASTM International structural steel standards
have evolved since the towers were built, the changes
are generally minor and not significant for estimating