[Public-List] Spreader bases on newer hulls.

[Richard Mair]

When we replaced the standing rigging in 2005 the mast had been tapped and
bolts put in. Since then we have been to sea on the Atlantic and up the St
Lawrence. We put the bolts in with a isolating paste and all has been good
so far. Some punishing weather on the way back to Ontario last year.

Richard
On Mar 24, 2014 4:09 PM, "Mike Lehman" <sail_505 at hotmail.com> wrote:

> I had a similar problem...the rivets (4 each side) had broken and the only
> think holding it together was center bolt. I elected to thru-bolt the plate
> by drilling out the rivets. These take a lot of stress...thru-bolt them
>
>
>
>
> ~~~_/)_/)~~ Mike Lehman ~~_/)~~~
>
>
> -----Original Message----- From: Jonathan Adams
> Sent: Monday, March 24, 2014 10:50 AM
> To: public-list at alberg30.org ; David Cooper
> Subject: [Public-List] Spreader bases on newer hulls.
>
> In replacing the rig on Cookin (Newer hull), Dave found that the spreader
> bases are held on with a bolt that goes through the mast, and below that to
> stabilize the tangs a collection of rivets. These rivets are being
> replaced. In all other respects the bases seem to be in good shape.
>
> The yard manager, indicated that the mast walls were not thick enough to
> take a tap and a bolt, and he recommended going all the way through with a
> bolt.
>
> Questions:
>
> 1. Does anyone have experience with this issue? What is the role of the
> rivets? I have an older hull, but bases are newer. I have no rivets. The
> tangs hang off the central bolt with a triangular plate. (this has issues
> too, but...)
>
> 2. I would not have hesitated to put a tapped bolt / machine screw in -
> anyone have any comments on through bolting versus tap and bolt?
>
> 3. Is there a downside to putting through bolts in? Probably not - as
> there were four holes there for the rivets. Clearly, one would have to
> remember not to crush the mast when tightening these bolts.
>
> Thoughts appreciated.
>
> Jonathan
> 197
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