20-05-2011, 03:26 AM
(This post was last modified: 27-05-2011, 01:59 AM by Jeffrey Orling.)
I have concluded a preliminary study of the safety factor of the twin tower steel columns at floor one based on an assumed gross building weight of 500,000 tons and A36, 36ksi yield strength steel.
The FOS is 1.54 for the steel at floor 1.
See attached graphic.
Note: if the gross weight of the building decreases the FOS increases and if the gross weight increases the FOS decreases.
I am replacing the graphic with a revised one showing MORE steel in the tree columns and a different OAL safety factor at floor one. The FOS would not change for any other floor.
The FOS is 1.54 for the steel at floor 1.
See attached graphic.
Note: if the gross weight of the building decreases the FOS increases and if the gross weight increases the FOS decreases.
I am replacing the graphic with a revised one showing MORE steel in the tree columns and a different OAL safety factor at floor one. The FOS would not change for any other floor.