Models direct from sketchup take a lot of cleaning up to be useful in archicad.
For use in archicad, you are better off recreating it with archicad tools.
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"