[c350ia] RE: c350ia digest, Vol 1 #314 - 1 msg

[Bob Delia]

I have Hull #020, and have had to repair 1 or 2 stair treads each year
since I got the boat.  I believe they used aluminum rivets initially,
because mine literally disintegrated. My last couple of repairs used
stainless rivets and silicone sealant, and that seems to last longer.
Bob Delia
AndiRose #020


Robert A. Delia
T 908.879.3173
F 908.879.6697
C 201.615.4450
www.landcapital.com



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Sent: Sunday, March 30, 2008 12:00 PM
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Subject: c350ia digest, Vol 1 #314 - 1 msg

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Today's Topics:

   1. [Fwd: Swim Ladder Treads] (skip7@verizon.net)

--__--__--

Message: 1
Date: Sun, 30 Mar 2008 05:43:49 -0500 (CDT)
From: <skip7@verizon.net>
To: c350ia@catalina350.net
Subject: [c350ia] [Fwd: Swim Ladder Treads]

>From: skip7@verizon.net
>Date: 2008/03/28 Fri PM 05:33:17 CDT
>To: c350ia@catalina.net, c350@list.sailnet.net
>Subject: Swim Ladder Treads

Hi Fellow 350 owners,

I think I had an error in my original mailing of this note so this is a
re-send.
=20
>I contacted Catalina and obtained the following information on the
evolution of the tread installation on the swim ladder:
>
>On some of the early 350s the treads were fastened with stainless steel
through-bolts and locknuts. 3M 5200 was used in the installation but as
we all know, that product does not adhere well to non-porous surfaces
such as stainless steel and starboard because it?s more of a sealant
than it is an adhesive. Therefore it was used in this application not as
an adhesive, but rather as a sealant around the through-bolt holes in
the starboard and the ladder bars.
>
>At some point in the process, it was decided that the appearance of the
ladder would be aesthetically cleaner if stainless steel rivets were
used instead of the through-bolts and nuts. 5200 was still used to seal
around the rivet holes.
>
>Finally, in order to make the ladder look as clean as possible and to
lower the maintenance by eliminating the rivet heads and the holes
through the treads and the ladder bars, the use of rivets was
discontinued in favor of a specialty adhesive from a major manufacturer.
However, it was quickly determined that the adhesive, which was
pre-tested and recommended by the manufacturer (which was NOT 5200) was
quite strong, a newer and better product became available and that was
Lord?s Acrylic Adhesive 663/6. (This is an industrial-use product that
is not available in stores).
>
>Catalina does not have a record of when these incremental changes
occurred, although they do keep fairly rigorous records on all the
critical facets of lamination, propulsion systems, etc.
>
>Carl and Liz Beckmann?s boat is hull #223 and I believe it to be a 2004
model. It appears that the early type specialty adhesive was used during
part of that production year and that likely explains why the tread on
their boat separated.=20
>
>Catalina has indicated that there is no need to try to remove and
re-glue treads on the ladders of boats of that vintage since they have
had few, if any other reports of treads coming off.=20
>
>Skip Penizotto
>c350 Technical Editor
>Mainsheet    =20



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