Thanks for the comments.
Brendan, yep they are made from 7 laminations glued together. For each rafter I ripped a 140 x 45 x 4200 length of treated pine into 15mm strips and glued 7 together in a jig - see photo.
So they end up 105 x 45 in section. The bottom chord ties them together and prevents spreading. There is still more bracing and noggings to fit plus the roof sheeting, so when complete will be more than adequate for the job.
The other photos show the hanging beam and rack for the opening mechanism.
A hammock ........mmmm........ I could put one in between the posts on the pool deck. That's actually quite a good idea.
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