This type is the most economical because it allows the realization of a large number of boxes saving material because the central wall is shared between the boxes on the right and those on the left. This aspect also allows to obtain a compact size of the structure. Generally, those who have less space available opt for this method  keeping just the same boxes available. The structure has an architectural double-slope shape.

You can add other spaces for service areas such as washing rooms, seddlery and club house.