Funny what a shower and a cup of coffee can do. Sorry for the post. The function is just CreateTrapAtLocation with GetLocation(OBJECT_SELF). Perhaps somebody else may find it useful.
CreateTrapAtLocation(TRAP_BASE_TYPE_AVERAGE_FIRE,GetLocation(OBJECT_SELF),4.0f,"NW_IT_TRAP018",STANDARD_FACTION_HOSTILE,"","");