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 TM 55-1905-223-SDC
Determining Length of Shore.
b. Lay off, on a carpenter's square, measurements A and B, using ratio of 1 inch to 1 foot.
c. Measure the diagonal distance between A and B. In the example given in FIGURE 7-2, this distance
is 7-7/8 inches. The distance in feet would be 7-7/8 feet, or 7 feet 10-1/2 inches. Subtracting 1/2 inch for
wedge space, the required length of the shore is then 7 feet 10 inches.
Section VI. APPLICATION OF SHORING
7-10. TRIMMING AND FITTING SHORES. Shores must be trimmed to fit the shoring structure, and the
trimming must be done in such a way as to prevent splitting or chipping of the shores. If shore A in FIGURE
7-3 is to fit against a plane surface of shore B, and if it must take a load in compression, the end of shore A
must be cut square and perpendicular to the long axis of shore A. Sharp points must never be used when
shoring is required to withstand pressure. FIGURE 7-4 shows the correct way to fit shores to present a flat
surface at each pressure area. The carpenter's square can be used to measure the angles of cut and to mark
the shore for cutting. Shores are sometimes
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