Wire rope
Wire rope is a collection of small strands of wire woven together in three different patterns which offer different levels of flexibility. Stainless steel rope can be used for the most demanding rigging applications, and comes in various constructions.
- 7 x 19 Stainless Steel Wire Rope consists of 7 strands each with 19 wires. It is the most common and versatile construction, and is flexible and easy to work with when the rope needs to turn corners or change direction. Commonly use is with a thimble and swage for fixed rigging applications. 7 x 19 is also used for limited working rope applications such as on a boat winch.
- 7 x 7 Stainless Steel Wire Rope consists of 7 strands each with 7 wires. It is not as flexible as 7 x 19, but can be wrapped around a thimble in smaller sizes. 7 x 7 is ideal for fixed rigging applications that require a slight angle, such as balustrading and safety barrier rail.
- 1 x 19 Stainless Steel Wire Rope consists of a single strand with 19 wires. It has a high breaking load and low stretch characteristics, but is the least flexible construction, and will not bend around corners or angles. 1 x 19 is suitable for fixed “straight line” rigging applications only, such as mast stays, guy ropes and structural applications. It is best utilised with machine swagged end fittings.
7×7 AISI316 stainless steel wire rope is used for a wide range of applications. More flexible than 1×19 but more rigid than 7×19, the 7×7 construction is often used where 1×19 lacks enough flexibility for an application or where 7×19’s weaker breaking load is too low for an application. Used extensively throughout the marine industry as well as for general engineering applications, 7×7’s excellent breaking load and flexibility in the smaller diameters make it a favourite for control cable and a variety of marine rigging applications, examples of which are shown below:
- Applications
- Control cables
- Guardrail
- Standing rigging
- Running rigging
- Steering cable
- Marine/Saltwater environment
- Sewage treatment works
- Wire rope slings
- Davit ropes
| Breaking Loads | |||
|---|---|---|---|
| Nominal Diameter | Approximate Mass | Minimum breaking loads – 1570 Mpa | |
| [mm] | [kg/m] | [kN] | [Kg] |
| 1 | 0.004 | 0.59 | 60 |
| 2.0 | 0.016 | 2.37 | 241 |
| 2.5 | 0.023 | 3.71 | 378 |
| 3.0 | 0.034 | 5.34 | 544 |
| 4.0 | 0.060 | 9.49 | 967 |
| 5.0 | 0.095 | 14.80 | 1,509 |
| 6.0 | 0.136 | 21.40 | 2,182 |
| 7.0 | 0.185 | 29.10 | 2,967 |
| 8.0 | 0.242 | 38.00 | 3,874 |
| 10.0 | 0.378 | 59.30 | 6,046 |
| 12.0 | 0.545 | 85.40 | 8,708 |
| 14.0 | 0.741 | 117.00 | 11,930 |
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