| 摘要 |
<p>A spiral strand (1), used in quai-static structural applications such as mast stays, bridge cables and offshore mooring lines formed of a plurality of layers such as (25, 26, 27). Each layer being formed of a plurality of individual wires (2). At least one inner layer (25) is shaped to provide a comparatively greater surface area contacting an adjacent layer than if the wires were of a circular cross section. The strand comprises at least seven layers provided radially outwardly of at least one inner layer. The inner layer being adapted to include non circular shaped wires such as (34) capable of withstanding higher tensile loads with a relatively low impact on weight, cost and complexity. The shaped wires can be of the full lock, half lock and z shape or trapezoidal cross sections. The strand may further comprise a compacted equal lay core of at least 49 wires covered by a first layer of shaped wires. A third layer may also be covered by the shaped wires and the outer surface of the strand covered with a plastic sheathing and the voids in the strand substantially filled with an incompressible medium.</p> |
