LEAP Bridge Steel Non-Composite Action
Tony, section will be non-composite if shear connectors are not present. Therefore do not define shear connector locations and also verify section properties at final to make sure that the section is non-composite. Under slab definition, you may unselect the box: "Top flange of beam is continuously braced when the deck hardens" (if that is the case you model).
For more information related to Leap Bridge Steel program please check the wiki articles in the below mentioned Bentley Communities link.
Leap Bridge Steel Main Page - LARS | LEAP | OpenBridge | RM Wiki - LARS | LEAP | OpenBridge | RM - Bentley Communities