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 TM 55-1915-200-SDC
CHAPTER 7
SHORING
SDC FIXES SHALL BE USED ONLY IN COMBAT OR OTHER EMERGENCY CONDITIONS AT THE
DISCRETION OF THE VESSEL MASTER. DAMAGES 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 bulkheads 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.
7-1
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