Eco-Mooring Anchors

Recently we have been working on our underwater installation options to help our customer achieve an environmentally friendly mooring option. The journey began back in last year, (concept video)  and we were delighted to have been able to successfully install the anchors under water.

Our mooring anchors have recently been featured on the news, showing how the use of our anchors can protect the seabed and protect the wildlife within.

Below you can find further detail on our screwpiles and their application under water, should you have any questions please don't hesitate to contact us.

ABC anchors are the preferred supplier of helical screw mooring anchors, compatible with Hazelett, Seaflex and other Advanced Mooring Solutions (AMS). We have exhibited our products at the Plymouth Boat Show, on thegreenblue stand together with The Ocean Conservation Trust stand at Sail GP in Plymouth.

Test installations have been carried out at Studland Bay and Cawsand, where in conjunction with an AMS the regrowth of sea grass right up to the head of the anchor is truly impressive.

Helical screw anchors are installed to pre-determined torque to ensure a predictable pull out performance.

As a rough guide, a single 60R anchor when installed to 50% of maximum torque delivers the same performance as a concrete block weighing 5 tonnes.

Clearly some sea beds are very soft and may require an additional 2m extension, whilst other rocky sea beds will not allow the anchor to penetrate - evidenced by a lack of torque.

In general, the mooring rode attached to a screw pile can be much shorter than a conventional setup. The rated pull out capacity corresponds to a vertical force, which would reduce the holding power of a concrete block, already reduced by its immersion in water.

For seagrass beds, it is important to prevent the mooring rode rubbing on the seabed so the ability to shorten this allows savings in material and permits closer spacing. Where unitary synthetic rodes are used, a camera can crawl down to carry out routine inspection, and aid removal when necessary.

In the Tamar River at Calstock concrete block moorings are frequently displaced when fallen trees wrap round moored boats. None of the screw-anchored boats has moved over two seasons.

Alexander Mitchell invented the helical anchor in the 1830’s and in wide use today, both as a tension and compression-resisting element. Naturally, they are generally buried out of sight, but practically every Telecom and Electricity pole has a helical stay anchor installed to resist lateral loads.

ABC Anchors designs and manufacturers helical anchors and installation equipment so we are uniquely placed to monitor real world situations and help our Approved Installers achieve consistently excellent results in the most challenging of situations.

For marine installations, we have hand held hydraulically powered torque heads, suitable for use by divers, excavator or crane mounted equipment and are developing a road transportable barge for multiple moorings.

We work with local mooring contractors whose site specific knowledge of the ideal combination of gear is essential to ensure a satisfactory result, we are, of course ready to train operators using our experience to date.

Confor 2017 – Register your interest

This September, our sister company Autoguide Equipment are celebrating their 40th anniversary, since being established in 1977! This anniversary is important as testament to many years of success and experience in the landscape construction and agricultural industries. Since the Confor Woodland Show corresponds perfectly, we are celebrating at stand, W47, on the 7th and 8th of September.

ABC Anchors will also be featured on the stand, with a tree friendly screwpile foundation system, recommended by the top arboriculturalists.

Autoguide's range of vibrating post drivers will be demoed at the show. Since it is such a special occasion, we are making a limited edition Midi Postmaster. Rubies are of course the gemstone associated with a 40th anniversary, so look out for this as a theme!

In following with our celebrations, we will be giving away a free ‘ruby’ gift to the first 40 enquiries. This will be on both days, so get in quick to avoid missing out! All you need to do is leave your details with your enquiry. If you’d like to register your interest online to save time on the day, please fill out the contact form below.

To keep updated on our celebrations, check our website regularly and subscribe to our newsletter.