Ground Anchors for Mooring

[Onewheeler]

I've had some experience in using Spyrabase ground anchors for mooring <<http://www.spyrabase.co.uk/product_info.php?ID=10502>l, rather than the helical shaped bar ones <http://www.spyrabase.co.uk/product_info.php?ID=10018>). (We've also managed to bend one of them!)

 

I found these Spirafix ones while googling around - wonder if anyone has experience of them? <http://www.spirafix.com/>They look as if they might go into difficult ground more easily.

 

Martin/

[Jambo]

No experience at this end I'm afraid but I'll be interested to hear responses.

 

I'm always slightly concerned when people suggest the helical bar ones as I've always suspected that they wouldn't be able to take much lateral force but this is the first time someone's reported bending them. What size boat do you have?

 

The ones with the blade style look like they'd be able to take a lot greater lateral load.

 

My suspicion is that any design of that nature is going to struggle in rubbly ground. Pins struggle too and they're getting a sledge or lump hammer's worth of force going straight down their axis. A screw just isn't going to have much force being applied at the rubble so I think it would be difficult. Probably best to have both at your disposal.

[Onewheeler]

To be fair, the Spirabase one was bent holding a 35 te boat when a large peniche went past...

[Jambo]

[magnetman]

Those spirafix anchors look great

 

Someone said that really good large Rond anchors may be available on the continent - that would be interesting to know about as wr regularly go to France by car and I'd love a couple of big heavy rond anchors for my barge

[FadeToScarlet]

Spirafix reckon they can hold a 115 foot boat...

 

https://s3-eu-west-1.amazonaws.com/cdn.webfactore.co.uk/sr_292609.pdf

[magnetman]

I wonder if it would be possible to drive the 50mm spirafix in using an electric plaster/paint mixer adapted a bit.

What's the biggest wood auger available

[Jambo]

Spirafix reckon they can hold a 115 foot boat...

 

https://s3-eu-west-1.amazonaws.com/cdn.webfactore.co.uk/sr_292609.pdf

 

oh so you're supposed to bash them in with a lump hammer but unscrew them to remove. I thought they were screwed in and out.

[magnetman]

The AC type has an internal thread in the top - ideal for screwing in an eyebolt to attach boat to I'd have thought.

 

Hammering would damage it surely.

[Robbo]

The AC type has an internal thread in the top - ideal for screwing in an eyebolt to attach boat to I'd have thought.

Hammering would damage it surely.

The one for boats that you hammer in has a eyehole already.

[magnetman]

Yes just seen the PDF.

I'd have thought it would tend to peen over unless it is specially treated to deal with hammer blows - I suppose it is.

[magnetman]

£73.50 inc vat and delivery for 4 of the 40mm type 500mm long suitable for 15m barge. I'd use 4 in a spring line configuration with 50mm ratchet straps holding one each end. For security

 

Not bad really - interesting item.