[Alberg30] Un-stepping Mast problem

[Gord Laco]

Hello there,

In normal use, the plate gets compression only, I wouldn't worry too much
about re-inforcing for side loads.  UNLESS, you have someone on board who
grew up around keel stepped masts and secures an anchor rode or tow line to
your mast.  Down she would come!

Gord
KC426 Surprise

----- Original Message -----
From: Bob Lincoln <lincoln at cc.UManitoba.CA>
To: <gord at transatmarine.com>
Sent: Friday, September 28, 2001 12:45 PM
Subject: [Alberg30] Un-stepping Mast problem


> One slight problem I had this year was that a small
> burgee cord was left tied from a spreader to a block
> plate under the mast step.  A friend and I had prepped
> the shrouds, etc. late the night before and I thought
> all was well.  It was getting quite dark.  The club
> uses small wire blocks on a crane that is attached at
> 180 degrees to the back of the larger boat hoist.  It
> is powered by a small electric motor on a winch.  When
> we tied a sling around the mast, with a follower rope
> and tightened the winch, the entire base plate came off
> with the lower part of the mast.  This was unexpected,
> and happened very quickly.
> All the parts stayed together, so it was easy to untie
> the burgee cord and take the plate and the mast step
> off without dropping it in the drink.  On #590 it
> appears that the plate had no through-bolts, only
> "uni-taps" threaded into the fiberglass about one-half
> inch.  There was only a slight bit of breakage around
> the lip of a few holes, otherwise the bed area for the
> mast plate looks ok.  I suppose the taps and bolts were
> only to prevent sideways or forward movement, and that
> they have very little vertical strength.  At this point
> I am looking at separating the taps, base plate and
> mast plate over the winter and then re-bedding and
> installing things.  I am not sure if it is necessary to
> thru-bolt these plates.  Any advice on this would be
> appreciated.  I recall hearing a 'cracking' sound this
> spring when stepping the mast, and this may have
> weakened the taps and bolts.
> Bob Lincoln
> Indigo #590
>
>
> -----Original Message-----
> From: public-list-admin at alberg30.org
> [mailto:public-list-admin at alberg30.org]On Behalf Of
> Daniel Sternglass
> Sent: Thursday, September 27, 2001 9:06 PM
> To: public-list at alberg30.org
> Subject: Re: [Alberg30] Un-stepping Mast
>
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