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 TM 55-1905-223-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
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.
7-12
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