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The illustrations are from a German website http://www.payer.de/tropenarchitektur/troparch047.htm

some of them are my own and have no publication.

Here I have worked out some timber details, a possible way of creating a heavy timber version of the plank roof. An adaptation of your pictured design. Something like this would be difficult to accomplish on a very large span. The outward thrust is going to be enormous.



The outer timbers are the longest, the longer these are the better. Their odd shape allows them to form a nice radiused exterior as well as aiding in load transfer. The cut off at the end help direct load paths.

The smaller timbers are joined into the larger ones, the dotted portion is a blade (not sure what you would call it exactly, a tenon? A blade?) that joins into the center of the larger timber and is pegged through to hold it in place. the orange markings show general peg locations.

The flat top is a possible issue, however it could be used as a good opportunity to put on a vented ridge.

There is a lot of joinery involved in this as you can probably see. This is adapted to functioning as a truss to support purlins.