A question about some angles.

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Ok, I''ve done my first 3v 5/8 dome few days ago and I have some problems that I want to remove for my next try. My dome is made of panels of triangles. I was using the same angles that you have on your calculator also. (10 degrees for the A strunt and 12 degrees for the B and C). The problem is that is a 2D angle and I''m using 3D cutting that has the other dimenssion fixed also (in my case of building, it''s 30 degrees for the strunts that are part of the hexagon''s triagles and 27 and 36 degrees for the strunts parts of the pentagon''s triangles). My question is that - are the 10 and 12 degrees angles properly set on my saw or I need to calculte them again in my case of building. Sorry for the bad english and the dire explanation, I''m more of a amateur at that area but I really enjoy building these structures and I really wanna learn how to do it better. And thank for the site, it realy helped me alot.

[ Comments 1 ]

posted by simon	02/01/2009 20:20:23
Hi gringoem If I understand you right, you want to make compound cuts to create the frame of the triangles out of square timber. The angles you give are right, but they're not measured in orthogonal planes because the top of the frame needs a bevel to sit in the frame of the panel. These compound cuts on square timber will do what you're asking for - but do a test one first as I'm not 100% my calculation is right, and you'll probably want to shave the bevel off afterwards. Simon