Bridge modeler issue - 2012

[bharathwajs]

Hi,

I am using bridge modeler add-in for creating bridges. I wish to create bridges with concrete slabs and girders, for which the tool has a default option. Is there any upper bound on the length (number of spans) of bridge that it can handle. I am trying to create bridges that has more than 15 spans and every time the software hangs. I am able to create normal slab bridges without girders though.......

Secondly, is there a way to replace the default pier option it provides us with?. I would like to create circular columns and I wish to know whether bridge modeler has this option

Please help!
Thanks,
Bharathwaj