TM 9-243
TYPES AND USES
CARPENTER’S SQUARE
The carpenter’s square is made up of two parts: the
body or blade, and the tongue. It has inches divided into
eighths, tenths, twelfths, and sixteenths.
The face side contains the manufacturer’s name and the
inches are divided into eighths and sixteenths as shown.
There are two tables down the center.
The rafter table is used for determining the length and
cut of rafters.
The octagon or eight square scale is used for cutting an
octagon from a square piece of material.
The back side contains the hundredths scale and is
divided into tenths, twelfths, and sixteenths as shown.
There are two tables down the center.
The essex board measure is used to compute the
number of board feet in a given piece of lumber.
The brace measure is used to find the exact lengths of
common braces.
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