2-10. Framing Square. Much could be written about the framing square
because of its many uses. However, we will cover only the correct
nomenclature (names of terms and symbols) of its parts and the tasks
for which it can be used.
In construction work, especially in house framing, the framing square
is an invaluable tool and has a use that is common to all squaring
devices. It is used for checking the squareness of building
materials and for the squaring or angling of a mark placed on the
building material. One arm of the square is placed against the edge
or face of the building material. The other arm, with measuring
units on it, is placed next to the desired mark on the building
material. A line is then drawn across the material to the desired
length or depth. It can also be used as a calculating machine, a
means of solving mathematical problems. You will use it for laying
out common, valley, hip, jack, and cripple rafters in roof
construction and for laying out stringers for steps.
Figure 245, page 324, shows the framing square and its principal
parts. The body of the square is the wider and longer member the
tongue is the shorter and narrower member. The face is the side
visible both on the body and the tongue when the square is held with
the tongue in the left hand and the body pointing to the right. The
various markings on a square are scales and tables. The square most
generally used is one with a 16inch tongue and a 24inch body.