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 TM 55-1915-200-SDC
7-14. WEDGES. As the shoring job progresses, check carefully to see that all wedges are exerting about the same
amount of pressure on the number being shored (FIGURE 7-10). Use as few wedges as possible to obtain satisfactory
results. Wedges are usually made of soft wood, preferably fir or yellow pine. A few hardwood wedges should be kept on
hand for special use where resistance to crushing is required. When hardwood wedges are used, they must be checked
frequently, as they have a tendency to work loose. Wedges should be approximately as wide as the shores with which
they are used. They should be cut with a coarse saw and left unpainted to absorb water and hold better. They can be
made with various angles at the leading edge. Blunt wedges do not hold as well as sharp ones. A wedge should be
about six times as long as it is thick. Thus, a wedge to be used with a shore that is 4 by 4 inches should be about 4
inches wide, 2 inches thick, and 12 inches long. Always drive wedges uniformly from both sides so the shore end will not
be forced out of position. Lock wedges in place so that they will not work loose and cause the shoring to slip (FIGURE 7-
7-15. USE OF SHOLES. Sholes (FIGURE 7-12) should be made of Douglas fir or yellow pine planks 1 inch or more in
thickness and from 8 to 12 inches wide. Wider sholes can be made by nailing cleats across two or more widths of
planking. Single planks can be cleated at the ends to keep them from splitting.
7-13
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