Kinked and flared continuous steel girder

I need some advice.

Situation

I have a flared steel bridge. the bridge is continuous. i am using leap steel bridge. there are 6 girders.  

basically girder spacing at abutment 1 is 14 ft +/- and pier 2 is 13 ft +/-. (Flare portion).

From Pier 2 to  pier 5 the girder spacing remains 13 ft +/-.  

I tried making the flare portion a different member group than the straight portion, but that makes it like 2 different spans, but i need it to be a single continuous bridge. 

Question

Any help on how to do this? 

cant share more than this due to external issues. 

thank you