If you want your attic space to have a flat ceiling you ll need to add collar ties to the framing.
Attic framing styles.
Timber frame or post and beam structures can styled in many ways such as a saltbox farm house fancy barn two story colonial or a hammer beam cape.
If you re familiar with basic carpentry and framing techniques installing decking for attic storage is a diy friendly project.
Four basic roof styles flat shed gable and hip serve as the foundation for complex styles such as mansard with its multiple hip planes and gambrel which features more than one gable plane.
Collar ties are horizontal members that like rafter ties extend from rafter to rafter but.
Often incorporating two or more designs for aesthetics and practical reasons combination roofs can feature a range of styles.
As pictured above it is likely to extend much further than a mansard besides having the lower pitched slope on the bottom.
The style depends first on the owners preference then on whether the building is a home barn church public structure or business along with the nature of its intended use.
A combination roof is quite literally a combination of types of roofs.
For this type of wood it is most often seen when building a hostel in vietnam you can refer to alo nha tro for more details.
A clerestory and hip roof for example.