SHORES MUST FORM A CONSIDERABLE ANGLE
WITH THE BULKHEAD THEY ARE SUPPORTING.
THIS IS USELESS
SHORES PARALLEL TO BULKHEAD
EXERT NO PRESSURE!
1 SHORES PERPENDICULAR TO BULKHEAD
EXERT MAXIMUM PRESSURE.
WHEN THE ANGLE OF THE 2 SHORES (X)
2 IS GREATER THAN 900 , THE EFFECTIVE-
NESS OF THE SHORES IS LESSENED.
3 THEREFORE IT IS BETTER TO ANCHOR
SHORES AT A AND B THAN AT C AND D.
Figure 8-18. Shoring angles.
If you are in charge of a shoring detail and if you
have enough shores on board, it would be a good idea to
give your shoring detail personnel some practice in
shoring. As they put up the shoring, explain what they
are doing right and what they are doing wrong and, in
each case, why it is right or wrong. Ensure that they
understand the principles of spreading the pressure,
and why a shore in cross-axial pressure might snap. Be
sure that they learn how to measure shores and how to
cut them correctly before they actually do the cutting.
If possible, obtain permission to put the shoring up in a
compartment where it may be left for a few days. This
will allow other personnel to inspect it and indirectly
learn something about how to shore.
When doing practice shoring jobs, be careful not to
cut the shores more than necessary. You will seldom
have an oversupply of shores aboard ship. If you do not
Figure 8-19. Shoring a hatch.
have spare shores for practice jobs, use strips and