On Mon, 22 Jun 2009 02:50:38 -0700 (PDT), Topaz
wrote:

This is an appeal to rec.ww's.
Does anyone have a copy of the Audel publication Carpenters and
Builders Library Book #1, containing information on Framing Squares?
It must be a about a 1923 print, or reprint thereof.

There is an ongoing discussion on some roof framing forums about how
to use the Octagon table. Not the table on a modern square, used to
turn a square-sided post into an eight-sided one. The Eagle square
made in those days had a set of scales to set out the angles of
rafters for an octagon roof; one of those scales appears to be "wrong"
- but it can't be !

It would be great if someone has a copy and is prepared to post how
the hip side cut (octagon) scale should be interpreted.

Topaz




My Audel's says the following:

"Table of Octagon Rafters

The complete framing square is provided with a table for cutting
octagon rafters, as shown in Fig. 34. In this table, the first line
of figures from the top gives the length of the octagon hip rafters
per foot of run. The second line of figures gives the length of the
jack rafters spaced 1 foot from the octagon hip. The third line of
figures gives the reference to the graduated edge that will give the
side cut for octagon hip rafters. The fourth line of figures gives
the reference to the graduated edge that will give the side cuts for
jack rafters."


Is this what you are looking for?



Regards,

Tom Watson
http://home.comcast.net/~tjwatson1/