Export to RISA tip

2 Quick Tips when exporting to RISA from Revit.

TIp #1: When exporting to RISA you have the option to choose your coordinate system.  Project or Survey

If you use project then anything AT or LOWER than 0'-0" will not come into RISA, therefore, use survey point and make sure it is below your lowest level elevation.  If you have a slab on grade at 0'-0" and don't need to analyze any framing at that level, then project will work just fine, unless:

Tip #2 your framing is referenced to the level at 0'-0".

Even if the work plane is above 0'-0" the reference level has to be set to a level above 0'-0".

Hit me up if you need a better explanation, but hopefully it will at least lead you a little further down the road