Nope, not an RR bridge. Here's what LeapSoft replied:
"Thank you, for your e-mail...
When you change from spread box to adjacent box option, the only thing which changes internally is distribution factor. So if you intend to mix adjacent box and spread box then note down distribution factors...
When modelling AASHTO box beams in LEAP Soft's Conspan LA, is there a means to model a mix of adjacent and spread box beams? For instance, I'd like to split the facia beams a few feet to accomodate utilities, and leave all the interior beams abuting each other. The analysis results from...