Shroud Load - Deadeye Lanyards

[movenden]

Hi,

I'm working through rigging calculations for our boat (traditional gaff rig) and I'm wondering if the lanyards used for deadeyes should have a slightly increased safety factor due to the number of bends it needs to make (I assume this lowers the breaking load).

Cheers,
Mark

[benz]

A big enough bend radius shouldn't weaken the lanyard significantly, and think of it this way: a 3-hole deadeye gives you six legs of lanyard line, a four-hole eight--so the lanyard can be pretty skinny and still be plenty strong.
Will you be using Dyneema lanyards? You can use thinner line than if using polyester or hemp line, and the bend radius will be better for the same thickness of deadeye.
Ben

[Brion Toss]

Hello,
If you run the numbers on classical lanyard proportions (half the shroud diameter for rope, same diameter for wire), you will see that the lanyard is always significantly stronger than the shroud or stay. This, along with seizings, provides redundancy, should any one leg be parted. Adapt lanyard diameter to relative material strength.
Fair leads,
Brion Toss

[movenden]

Thanks for the quick replies.

Ben- No, still planning to use some sort of 3 strand for the aesthetics - traditionally rigging boat. I have spent the day reading the forum threads about HM standing rigging - very interesting material, but the looks/cost make me still consider galvanized....

Cheers,
Mark