Sweet Sawdust, thanks for the effort you took, but it is not the
octagon scale
I want.

Tom Watson, that looks more promising. In Fig 34, are there the
phrases
"use XXX" and "use VVV" at the end of the third and fourth lines of
the table?
If so, any explanation about XXX and VVV in the text ?
Or what they mean by "graduated edge" ? Thanks in advance.

Scott, You also appear to have the real thing, although what you
describe sounds
like a protractor enscribed on the square. In the "original", the
description I am
looking for appears on pages (22,23) but especially 24 and 25, with
figure on 26.
How is it in your copy ?
Greetings,
Topaz



On 22 jun, 19:38, (Scott Lurndal) wrote:
Topaz writes:
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 !

Second page of the book (1928 reprint, gilt edges, embossed leather bound):

* *The lines radiating from division 12 on the tongue of the square
* *to various points on the blade as seen in Figure M, ar inclinations
* *corresponding to various roof pitches for common rafters.

* *For octagon, or hip rafters, use mark 13 or 17 respectively.

* *The pitch (ratio of blade to tongue) is identical for 12, 13 or 17
* *(i.e. 12/24, 13/24, 17/24 are all pitch of 1, 12/18, 13/18, 17/18
* * are all pitch of 3/4 etc.)

scott