Dual Pitched

The dual pitched roof is as it says; it has two slopes that normally meet at the centre line or ridge as its better known this is typically at the centre of a building, (but not always) and extend to cover the entire structure. These are popular because they allow for sufficient space at the top of a building, for maximum efficiency and work space. 

The two slopes on a dual-pitch roof meet at one line, typically at the centre of a building, and extend to cover the entire structure.