Simple roofs in general use with a double slope are the " coupled rafter roofs," the rafters meeting at the highest point upon a horizontal ridge-piece which stiffens the framework and gives a level ridge-line.
I landed on the floor with the rope still tied to the rafter.
In fact, situated right in downtown Placerville, you'll discover a building with a mannequin hung from the neck, hanging from a rafter sticking out of a building.
This may require an additional counter batten to be fixed to the top or bottom of the rafter to increase the insulation space.
Tiled floor, standard wall finish with two 19thC windows on west and east; simple purlin and rafter roof.