Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 10-05-2011, 14:41   #1
Registered User

Join Date: Jan 2008
Location: Nova Scotia, Canada
Boat: Seafarer 30 Impetuous
Posts: 426
Images: 45
Anyone Have Experience (or Engineering Advice) on DIY Helix / Screw Anchors ?

Hi folks,

I am considering using a couple / few Helix / Screw style anchors to hold my floating dock in place.

For a couple of reasons ( need to do this in next couple of weeks, no local availability of Pre-made, and cost) I am condiering welding up my own out of some heavy duty galvanized pipe, and flat stock cut / welded to form the conical screws.
I would have to grind off the galvanized coating where I weld, but, as this part would be buried several feet in the deep sand and mud, I would think it would be good for several years.

I think I would walk up to about my waist, at low tide, and have a friend help me turn them into the bottom, prehaps using a 10' piece of pipe / rod , horizontally, to turn it in. I could have this go through a slot or hoop at the top of the anchor, to drive it in.

Any thoughts would be appreciated.
__________________
Northeaster is offline   Reply With Quote
Old 10-05-2011, 16:07   #2
Registered User
 
svcattales's Avatar

Join Date: Apr 2005
Location: Apollo Beach, Fl
Boat: Privilege 37
Posts: 533
Images: 10
Re: Anyone Have Experience (or Engineering Advice) on DIY Helix / Screw Anchors ?

Quote:
Originally Posted by Northeaster View Post
Hi folks,

I am considering using a couple / few Helix / Screw style anchors to hold my floating dock in place.

For a couple of reasons ( need to do this in next couple of weeks, no local availability of Pre-made, and cost) I am condiering welding up my own out of some heavy duty galvanized pipe, and flat stock cut / welded to form the conical screws.
I would have to grind off the galvanized coating where I weld, but, as this part would be buried several feet in the deep sand and mud, I would think it would be good for several years.

I think I would walk up to about my waist, at low tide, and have a friend help me turn them into the bottom, prehaps using a 10' piece of pipe / rod , horizontally, to turn it in. I could have this go through a slot or hoop at the top of the anchor, to drive it in.

Any thoughts would be appreciated.
I bought 2 helix anchors from this company Helix Mooring Systems to secure my boat for hurricanes in Florida. I set the first one a couple years ago and it wasn't too difficult to do by myself. The anchor shaft is about 5ft long with a 9.5 inch diameter on the helix. I used a heavy steel bar about 5ft long as a lever to twist the anchor into the bottom in 1ft of water at low tide. I put the end of the bar through the loop at the top of the shaft. (The bottom was sand) The company claims the anchor should handle at least 5000 lbs of load before pulling out. I used it for one "hurricane drill" but we didn't get a direct hit and winds were not that strong so I haven't given it the ultimate test... thankfully.
__________________
Greg, SV Cat Tales
svcattales is offline   Reply With Quote
Reply

Tags
anchor

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Heavy weather tactics. Anyone want to share experience with sea anchors or warps? spencer53 Weather | Gear, Reports and Resources 72 04-03-2013 14:42
PLEASE - I Need Your Experience / Help / Advice / Knowledge / Input roberthunnisett Training, Licensing & Certification 9 22-09-2010 03:05
Crew Available: Marine Engineering Graduate with Ten Years Experience emilmanalo Crew Archives 0 01-12-2009 00:12
Advice sought from those with experience... pauldeeb General Sailing Forum 8 03-01-2008 15:48


Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 17:51.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.