TRIMMING SHORES
B
Shores must be trimmed to fit the shoring
structure. The trimming must be done in such a way as
to prevent splitting or chipping of the shores. If shore A
in figure 8-14 is to fit against a plane surface of shore B
A
and if it must take a load in compression, the end of
shore A must be cut square and perpendicular to its
long axis.
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Figure 8-16. Socket cut in shore.
GENERAL SHORING RULES
B
Most shoring is done to support bulkheads that are
endangered by structural damage or weakness caused
by a hit or by the pressure of flooding water. The
A
pressure on the bulkhead of a flooded compartment is
tremendous. Expert shoring is required to hold such
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bulkheads in place. Some of the general rules to
remember in connection with shoring bulkheads are as
follows:
Figure 8-14. Trimming shore to shore.
Always allow a large margin of safety. Use
MORE shores than you think you need, rather
A sharp point must never be used when a shore will
than fewer.
be required to withstand pressure. A pointed end will
slip and curl and allow the shore to work loose and
Spread the pressure. Make full use of strength
move. Figure 8-15 shows the correct and incorrect
members by anchoring shores against beams,
ways to trim shores to present a flat surface at each
s t r i n g e r s , f r a m e s , s t i ff e n e r s , s t a n c h i o n s ,
pressure area.
barbettes, and so forth. Place the legs of the
shoring against the strongback at an angle of 45
or 90 if at all possible. Figure 8-17 shows the
simplest and strongest shoring structure; figure
8-18 shows shoring angles.
A
B
Do not attempt to force a warped, sprung, or
bulged bulkhead back into place. Place the
shoring so that it will hold the bulkhead in its
warped or bulging position.
When possible, strengthen the main shores with
BAD
GOOD
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auxiliary shores.
The same general rules apply to shoring a hatch or
Figure 8-15. Trimming shore to deck.
a door. However, the entire hatch or door should be
shored and the pressure should be spread over both the
hatch cover or door and the supporting structure, as
Shores are sometimes notched at the end to fit
shown in figure 8-19. Remember that hatches and
against other shores. However, this method should not
doors are the weakest part of the bulkhead or deck in
be used if you expect any great pressure. A safer
which they are installed. Shoring doors and hatches
method is to cut a socket in the side of one shore and fit
may be complicated by the presence of scuttles and
the butt of the other shore into the socket. This method
quick-acting handwheels. In the situation shown in
is shown in figure 8-16.
figure 8-19, the shores are arranged in such a way as to
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