at 1570 F, steel retains a small % of it's strength, it begins to weaken at substantially lower temperatures.
Anyhow, once again, such a glaring weakness in the official explanation would be so easy to substantiate that a high school newspaper editor would tear it apart.
Obviously, such a glaring weakness does not exist unless you believe the worldwide media and every elected politician in this country is part of the cover-up. Of course, researchers that performed post 9/11 studies and the worldwide scientific community is also in on the gig. You are arguing that they have all overlooked such a simple fact.
As for me, I think any argument that suggest the fires weren't hot enough is simply intellectually inferior.