DSK wrote:

Have you seen many keelboats with masts fixed by a thru-bolt at the partners?
This is not a very common arrangement at all over here. In fact I haven't ever
seen one.



MC wrote:
Well it is seen in offshore boats. It serves to lock the deck to the
mast to make the deck stronger as well as ensuring the parner seal
doesn't work when the mast pumps.


A lot of boats I've seen have "partner stays" which go from the keelson to the mast
partners just aft of the mast. It keeps the deck from rising under athwartship
compression. It also keeps the partner seal from working.


Yes.

Chocks also lock the deck to the mast, if installed properly, and don't viloate either
the tension or compression wall of the mast.

As for the mast pumping, that's a bad idea.


Yes and the current vogue of swept back spreaders and no runners will, I
think, lead to greater lateral mast tip movement if it starts...

Cheers