Purpose: Used to modify live loading in LRFD projects.
--> Given in girder system input in Girder System Projects. Given in girder input in Line Girder Projects.
A multiplier used to modify the tandem truck loading. For example, a TFACTT of 1.2 would increase tandem truck axle loads by 20 percent. Default value is 1.0.
Truck Loading in Girder System Projects