in design of steel structures as per asce2005 or ibc2006 ,what load combinations are to be considered when crane loads and seismic loads are present?
Uh, depends on if you're using ASD or LRFD load cases out of ASCE 7-05. I also think IBC 2006 sometimes changes the fine print and also offers their own load cases for ASD and LRFD. A starting point (LRFD case 5 ASCE 7-05) might be 1.2D+1.0E+ L, and for ASD - case 6 - D + 0.75(0.7E) + 0.75L.
