Purpose: Used to define slab reinforcement steel.
--> Given in girder input
A list of alternating spacings (feet or meters) between and including lengths of negative moment rebars.
The first value in the list is the distance from the left bearing of the girder to the beginning of the first set of negative moment rebars, the second value is the length of those rebars, the third value is the spacing to the next set of rebars, etc. If not given, rebars are used for negative stress determination in all composite regions.