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Plates placed between a crossing and the ties to support the crossing and protect the ties.



Related Terms

HATCH BEAM

Portable beam across a hatch to support hatch covers

SHORE

A brace or prop used for support while building a ship

FLAMMABILITY LIMITS

The upper and lower bounds of the fuel/air mixture which will support combustion. The upper flammability limit indicates the maximum fuel concentration in air that will support combustion. The lower flammability limit indicates the minimum fuel concentration in the air that will support combustion. Outside of these bounds the mixture does not burn.

LUG

As applied to boiler suspension, a steel eyepiece fitted and riveted or welded to the curvature of a boiler shell or drum and connected by a steel U-bolt or sling rod to overhead steel structure; used to support the weight of a boiler.

STAYBOLT

A bolt threaded through or welded at each end, into two spaced sheets of a firebox or box header to support flat surfaces against internal pressure.

OMBO

One Man Bridge Operations when a sole OOW maintains a navigational watch on the bridge without the support of additional personnel, other than a helmsman engaged in steering

CARGO CONTAINMENT SYSTEM

The arrangement for containment of cargo including, where fitted, primary and secondary barriers, associated insulations, interbarrier spaces and the structure required for the support of these elements.

INERT GAS

A gas, such as nitrogen, or a mixture of non-flammable gases containing insufficient oxygen to support combustion.

LOWER FLAMMABLE LIMIT (LFL)

The concentration of a hydrocarbon gas in air below which there is insufficient hydrocarbon to support combustion.

CHOCK, BOAT

A cradle or support for a lifeboat.

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