FAQ: Big Fella's

Some creatures like Chaos Greater Daemons, Eldar Avatars and Tyranid Hive Tyrants/Carnifexes are huge great monstrous things. They are classified as 'infantry' for movement purposes because they are still smaller and more agile than vehicles, but on the other hand they shouldn't fit inside transports as easily as infantry units. Players may wish to adopt a house rule that these creatures cannot be carried by transports at all, or that they can only be carried by transports with a capacity of six or more units (which should be big enough for them to fit in). You could apply this rule to walkers as well.