Issue 9 and Volume 151.

SOMETHING FOR EVERYBODY BY FRANCIS L. BRANNIGAN, SFPE High-strength concrete is currently being widely used. It appears to be subject to explosive spalling, which would be hazardous to firefighters and greatly reduce the fire resistance of the structure, possibly leading to collapse. I am working on the subject. In the meantime, I urge that you contact the building department, determine those buildings built of high-strength concrete, and note this in preplans. The possibility of a hot sustained fire in cargo was not anticipated in the planning of the English Channel Tunnel. A large area of concrete tunnel simply spalled out of existence. Fortunately, it was in solid chalk at the point of the fire. The spalling of concrete will expose the steel “reinforcing,” which provides tensile strength to the composite concrete. This is particularly dangerous in tensioned concrete. The steel tenons totally fail at 8007F. “MY WAY OR THE HIGHWAY”…

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