9-11/evidence/temperatures

About
For now, this is a collection of notes about temperatures believed to have been achieved within the WTC fires, and temperatures at which various things happen to materials (especially structural steel) known to have been used in the WTC construction, for comparison purposes.

These figures are preliminary; sources need to be found, and these numbers need to be compared with figures found in other 9/11 literature (official and otherwise).

See also: Issuepedia:Archive/Corus Construction/fire/6. Steelwork Fire Resistance for some data on how steel's strength changes with temperature.

Definitions
Critical temperature is the temperature at which a structural element cannot safely support its load. (Presumably the size of "load" is based on a rating for that particular material.) This temperature is often defined as the temperature at which the element's yield stress has been reduced to 60% of the room temperature yield stress.

Comparison Table
Numbers in italics have been converted from figures given in the other measure of temperature.