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Bulkheads were known to the ancient Greeks, who employed bulkheads in triremes to support the back of rams. By the Athenian trireme era (500 BC), [1] the hull was strengthened by enclosing the bow behind the ram, forming a bulkhead compartment. Instead of using bulkheads to protect ships against rams, Greeks preferred to reinforce the hull with ...
The strength of ships is a topic of key interest to naval architects and shipbuilders. Ships which are built too strong are heavy, slow, and cost extra money to build and operate since they weigh more, whilst ships which are built too weakly suffer from minor hull damage and in some extreme cases catastrophic failure and sinking.
HMS Glatton in drydock, circa 1914–1918, showing her anti-torpedo bulge. The anti-torpedo bulge (also known as an anti-torpedo blister) is a form of defence against naval torpedoes occasionally employed in warship construction in the period between the First and Second World Wars.
Armor and underwater protection of King George V and Tirpitz. Belt armor on damaged USS Oklahoma.. Frequently, the main belt's armor plates were supplemented with a torpedo bulkhead spaced several meters behind the main belt, designed to maintain the ship's watertight integrity even if the main belt was penetrated.
In shipbuilding, a strongback, known as a waler is oriented lengthwise along a ship to brace across several frames to keep the frames square and plumb. [1] In formwork strongbacks (typically vertical) reinforce typically horizontal walers to provide additional support against hydrostatic pressure during concrete pours.
A fire extinguisher can be the difference between a minor house fire and the total loss of your home. However, a fire extinguisher is only as effective as its accessibility when disaster strikes ...
A subdivision of the sheet plywood boat building method is known as the stitch-and-glue method, [8] where pre-shaped panels of plywood are drawn together then edge glued and reinforced with fibreglass without the use of a frame. [9] Metal or plastic ties, nylon fishing line or copper wires pull curved flat panels into three-dimensional curved ...
An empty fire extinguisher which was not replaced for years. Most countries in the world require regular fire extinguisher maintenance by a competent person to operate safely and effectively, as part of fire safety legislation. Lack of maintenance can lead to an extinguisher not discharging when required, or rupturing when pressurized.