This is an excellent book,(out of print) widely used for
many years for Hip and Valley rafter connections, and
diahedrial bend angles for Bins and Hoppers.
BEVEL ANGLES FOR THREE DIMENSIONAL CONNECTIONS.
By: Frank L. Martindale
Published by: Arthur I. Martindale, C.E.,1948 (32-Pages)
You can download a ZIP file, or a PDF file of this book at Steel Detailers on the Net .