determining angles-valley blocking

[jobox]

I am trying to locate the chart for the angle of the plumb and miter cut for the freeze or bird blocks intersecting the valley at the eave line. I believe the Roof Framing Bible had such a chart but don't have mine handy. Any tips would be much appreciated.

[Joe Bartok]

jobox, if you can't get the info you're looking for, I'll take a shot at calculating the angles. To start off on the right foot, I need the following:
The common pitches and the angle of intercept of the ridgelines in plan (this is normally, but not always, 90 degrees).
A description of the orientation of the faces of the blocking (probably a plumb face and one face set in the plane of the roof, but I'm not going to assume this is the case). Also the direction the blocking runs on the roof (for example, is it at right angles to a common rafter?).
Best of all, a sketch or diagram would be really helpful.