Complex sentence: They are able to hold around 90-120 passengers at a time and are around 26-32m long, depending on the amount of wood used, and about 2.7m wide.
Split into simpler sentences: They are able to hold around 90-120 people at the same time. It is around 26-32m long, depending on the amount of wood in the time it is built, and about 2.7m wide.