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 TM 55-1905-223-SDC
SHORING
SDC FIXES SHALL BE USED ONLY IN COMBAT OR OTHER EMERGENCY
CONDITIONS AT THE DISCRETION OF THE VESSEL MASTER. DAMAGE SHALL BE
REPAIRED BY STANDARD MAINTENANCE PROCEDURES AS SOON AS
PRACTICABLE.
Section I.
SHORING-INTRODUCTION
7-1. GENERAL. Shoring is the process of placing supports against the side of, below, or above a
structure to prevent metal fatigue, sagging, and bulging.
Shoring is often used to support ruptured decks, strengthen weakened bulkheads and decks, build up
temporary decks and bulkheads against the sea, support hatches and doors, and provide support for
equipment which has broken loose.
Section II.
CONSIDERATIONS FOR THE USE OF SHORING
7-2. FACTORS OF CONSIDERATION. There are three factors to be considered in regard to the use of
shoring.
The first factor deals with the arbitrary limitation of pressures in the Schedule of Watertight Integrity
Tests and Inspections. The maximum pressure specified in these schedules has no relationship to the
strength of the structure as built into the ship. The limitation of pressure is to prevent unsightly
deformation of structure during peacetime and to provide only sufficient pressure to insure a reasonable
test of the space. Deformation which results from increased pressures incident to damage is acceptable,
and it should be recognized that in most cases of flooding due to damage some deformation will occur.
The second factor deals with the strength of the structure in its relationship to the pressure that will
be exerted on the bulkhead or deck due to actual flooding. All principal transverse and longitudinal
structural bulk- heads and all watertight decks are designed and built to stand the maximum static
pressure which any conceivable flooding can place on these structures. Provided the bulkhead or deck is
in a proper state of preservation, this pressure may result in deformation but there will be no serious
threat of failure.
Failure of a bulk head may occur, however, from one of the following causes:
a. If the structure is old, it may have been subjected to considerable corrosion and so be
weakened.
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