Q: What is the beam of these power catamarans and what advantages does that offer me compared to a mono-hull or other catamarans I might have seen. A: The beams vary across the PE line from 22' to over 25'. These are considered wide catamarans as opposed to many power catamarans that barely exceed mono-hull dimensions. This beam created unique living spaces at lower overall length while also dramatically reducing the roll typical of narrower or mono-hull forms. Additionally, stability is increased over other hull forms.