These posts are of my own design concept (and are copyrighted), and are intended to show the general arrangement of pieces in the structure. So, certain joinery and geometrical details have been omitted from the illustrations. I take the liberty of noting that if you seek to emulate this design in some manner, be forewarned that it is somewhat difficult to execute. Pentagonal roof framing with a reciprocal support ring composed of parallelogram shaped beams, and incorporating a double roof with curved eaves is not a basic roof form. Ideally, you will have want to have mastered regular hip roof framing with joined timbers, then polygonal roof framing with timbers, and then standard hip roof, double form, with curved eave before venturing into this territory.
At the conclusion of the last post, the reciprocal beam assembly was in place and the lower hip rafter were fitted:
You can see how the reciprocal beams have been extended beyond the wall plate to pick up the outrigger beam at midpoint. Also, note that the upper ends of the reciprocal beams have been trimmed so as to form a leveled surface.
Next, an inner purlin ring is fitted:
Then the main lower hip rafters are fitted:
Next, the common rafters are shown, which, in this example are of parallel type not fanned:
Atop the common rafters are two layers of perimeter eave fascia, the hirokomai and yodo respectively:
A perspective view of the half-completed roof structure, which shows the curved eave line a bit better:
A view from directly above:
And the view which is a prime consideration in the design - inside the building looking up (click the image to enlarge):
A bit like a snowflake, no?
In the next post in the series I will add more parts as the roof structure builds. I hope you've enjoyed the tour so far. Thanks for dropping by the Carpentry Way. On to part 8