4.1 Shatter Test Machine, which is the same as that described
and illustrated in Test Method D 3038, shall consist of
a box 18 in. (457 mm) in width, 28 in. (711 mm) in length, and
approximately 15 in. (381 mm) in depth, supported above a
rigidly mounted cast iron or steel plate not less than 1⁄2 in. (12.7
mm) in thickness, 38 in. (965 mm) in width, and 48 in. (1219
mm) in length. The inside of the bottom of the box shall be 6
ft (1.83 m) above the plate. The bottom of the box shall consist
of two doors hinged lengthwise and latched so that they will
swing open freely and not impede the fall of the coal. Boards
about 8 in. (200 mm) in height should be placed around the
plate so that no coal is lost. To prevent the breakage of coal,
which may occur while placing the sample into the box, the
box shall be constructed so that it can be lowered to a