Docks & Wave Attenuators
With the Hazelett DockMaster System 1-4 elastics are connected on the bottom side to the shackle which connects to the anchor and on the top side to a shackle which connects to unline, rope or chain depending on design.
The quantity of elastics used varies depending on the project requirements. A limit line with a 105kn-194kn break strength is integrated to limit stretch as needed and provide additional break strength.
A double 10′ (3 meter) DockMaster System provides a 60kn working load and a 240kn break strength. A triple 10′ (3 meter) DockMaster System provides a 70kn working load and 240kn break strength.
The DockMaster is used throughout the world to moor concrete jetties, aluminum pontoons, modular plastic pontoons and more. Typically installed under pre-tension, the DockMaster evenly distributes loads throughout the lines creating the most stable, safe and eco-friendly dock mooring system in the world.
Docks and wave attenuators anchored with chains tensioned at high tide will wander at low tide when the chain becomes slack. When wind and waves build, chain-anchored structures will jerk violently as the chain becomes taut. Peak loads at the windward chain-to-dock connections can cause them to fail.
Docks and wave attenuators anchored with Hazelett Elastic Rodes (or a combination of elastic rodes and chain) are tensioned at low tide, so they stay put at low tide. As the tide rises, the elastics stretch. Docks and wave attenuators secured with Hazelett Elastic Rodes have a more gentle motion, reduced point loads, and are easier to walk on in rough weather.
Inspection & Maintenance
The Hazelett elastic system has a 10-year life expectancy and requires minimal maintenance. Docks anchored with Hazelett elastics have uniform loads on the entire structure. Our single point systems reduce point loads and ensure boats stay pointed directly into the wind with a constant, gentle pull. While our mooring system requires minimal maintenance, we recommend the elastics be inspected on a yearly basis and after strong weather events such as hurricanes. Inspections should be conducted regularly by trusted and qualified mooring installers. If desired, we are partnered with quality inspectors who will be happy to travel to project sites to inspect moorings and guarantee the integrity of the mooring system(s).
Hazelett Marine strives to support our clients throughout the installation process. We value our customer relationships and strive to provide the best service possible. Hazelett recommends and can provide a professional, certified and experienced installer to be on-site to conduct or supervise installation. Hazelett installers can provide all necessary information and feedback to ensure a proper installation that will guarantee the structural integrity and reliability of the mooring system(s).
International PADI, Inc, California | March 2015
The Hazelett Elastic Mooring Rode offers a better solution. Because of its engineered ELASTICITY, it stretches out smoothly under the load of wind and sea, thereby eliminating the peak forces of a rigid chain rode. The Hazelett rode provides a new dimension in mooring systems – the dimension of elasticity. During storm conditions, this new dimension also protects against the effects of the sudden increases in water depth caused by storm surges or the impact of a break-away boat.
Bryan Gullan, Isle of Man | November 2017
The elasticity within the mooring set-up eliminated entirely the ‘snatch’ associated with chain moorings during heavy weather and helps the boat to maintain a very stable position over the mooring in rough conditions. The Hazelett system eliminates virtually all moving parts, so reducing wear on the majority of components.
RPS APASA PTY LTD, Australia | July 2014
Hazelett rodes maintain elasticity to absorb forces from strong winds and tides and preserves the integrity of the mooring system under severe storm conditions.
Massachusetts Division of Marine Fisheries, Massachusetts | February 2009
Seagrass loss associated with boat moorings at Rottnest Island, Western Australia.
BACI design reveals the decline of the seagrass Posidonia oceanica induced by anchoring.
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