Rigging Screws are used to provide a means for length adjustment and tensioning. They are used with guys for masts, towers, tall structures and engineering applications. Rigging Screws generally have elongated eyes or clevis end fittings for connection to shackles, wire rope assemblies, pad eyes and the like. A central cross-hole is provided in the body to enable the body to be rotated by means of a bar inserted through that hole. An observation hole is provided at the inner end of the thread, at each end of the body, which permits visual observation of the maximum permitted extended position of the end fitting. Rigging Screw bodies are formed from tubular sections of steel and can have an almost infinite size range and scope for length adjustment. Size and adjustment of rigging screws is limited by the available end fittings. Additionally, Rigging Screws have the innate facility for continuing lubrication as the enclosed section of the body provides a suitable reservoir for grease or other lubrication. Hence, they have an advantage in relative corrosive applications such as ships’ rigging and permanent outdoor guys.
Grade L Rigging Screws - Units supplied are commercial grade rigging screws and tested to the Grade L requirements as per AS 2319 - 2001. Certification of Grade L products are issued with goods upon delivery.
Grade P Rigging Screws - End fittings for this range are manufactured using a High Tensile grade material, followed by the subsequent heat treatment to meet the Grade P working load requirements as per AS 2319 - 2001. Certification of Grade P products are issued with goods upon delivery.
Grade S Rigging Screws - End fittings for this range are manufactured using a High Tensile grade material, followed by the subsequent heat treatment to meet the Grade S working load requirements as per AS 2319 - 2001. Certification of Grade S products are issued with goods upon delivery.
Heavy duty Rigging Screws range from M10 to M24 nominal size barrels. Rigging Screw End fittings and complete Rigging Screw assemblies are produced by Townley Drop Forge to meet the performance requirements of AS 2319 - 2001. The commercial range is manufactured to the same exacting standards and are subject to the full process control of ISO 9001. The Imperial thread range conforms to the load requirements of AS 2319 - 2001.
Rigging Screws manufactured in accordance with Australian Standards have a safety factor of 6:1. This safety factor helps to counter possible problems from shock, vibration, fatigue, wear, damage and corrosion. This safety factor must be maintained.
Rigging Screws are manufactured from raw material complying with the relevant requirements of either AS 1442 or AS 1444, or be of another material that meets the intent of AS 2319 – 2001.
Because of inherent differences between stresses in the component parts, different types of steel may be used in any quality graded Rigging Screw. End fittings generally require higher tensile steels than bodies do, to give a matched overall performance.
Townley Manufacture exclusively from Australian made steel.
CARE IN USE
Where components are interfaced, they should readily connect and freely articulate, to ensure that loading will be applied in tension.
Care should be taken to ensure that rigging screws are not excessively tightened beyond the specified rating in tension
Regular inspection is required by a competent person
Threads should be protected from corrosion by effective means
The Rigging Screw should be removed from service if it has a damaged screw thread, distorted body, distorted fitting, nicks, gouges, cracks or corrosion