Bosch GCM18V-12GDC Instrucciones De Funcionamiento Y Seguridad página 45

Pitch angle information – The top section of the miter
scale shows angle settings required to cut roof rafters to
the "Pitch Angle" system. 2/2, 4/12, 6/12, etc., are all
pitch angles. This system is based on using the English
Fig. 45
Crown molding information – There are miter position
settings for compound-cutting crown molding flat on
the table. Crown molding with 38° "spring angle" uses
the 31.6 setting (with detent) and crown molding with
45° "spring angle" uses the 35.3 setting. NOTE: This
cutting method also requires that specific bevel angles
are set – see Cutting Crown Molding on page 53.
Saw Operations
12
RISE
12 RUN
12/12
"inches." A 6/12 pitch angle roof equals a ratio of 6"
"rise" for every 12" "run" (see Fig. 45).
6
RISE
6/12
12 RUN
45