[Rhodes22-list] How to replace forward lower chainplates?

Fri Aug 2 17:38:16 EDT 2024

Once you cut the hole for the inspection port, you will be able to access everything you need to get at to remove the chain plate.

Roger Pihlaja
S/V Dynamic Equilibrium
1978  Sanford, MI
Sent from my iPhone

> On Aug 2, 2024, at 5:32 PM, Michael McKay <mm.bizlist1 at gmail.com> wrote:
>
> I thought the screw and plywood are overhead-is the screw accessible?
>
> Michael McKay (mm.bizlist1 at gmail.com)
>
>
>> On Fri, Aug 2, 2024 at 5:30 PM ROGER PIHLAJA <roger_pihlaja at msn.com> wrote:
>>
>> Mike,
>>
>> After you free the chainplate from the plywood, you will be able to pull
>> it out backwards thru the inspection hole.  If the part above the roof is
>> so bent that you can’t straighten it enough to fit thru the hole; then, cut
>> it off.
>> Roger Pihlaja
>> S/V Dynamic Equilibrium
>> 1978. Sanford, MI
>>
>> Sent from my iPhone
>>
>>>> On Aug 2, 2024, at 5:03 PM, Michael McKay <mm.bizlist1 at gmail.com> wrote:
>>>
>>> Roger, how did you remove the old chainplate?  Did you just cut it off?
>>>
>>> Michael McKay (mm.bizlist1 at gmail.com)
>>>
>>>
>>>> On Fri, Aug 2, 2024 at 5:00 PM ROGER PIHLAJA <roger_pihlaja at msn.com>
>> wrote:
>>>>
>>>> Mike,
>>>>
>>>> If you do it my way; then, you only have to drill the hole for the
>> Beckson
>>>> inspection port in the inner cabin wall.  No holes in the cabin ceiling!
>>>> From the hole in the cabin wall, you will be able to remove the old
>> chain
>>>> plate.  The new chain plate will just be a straight piece of SS bar
>> stock
>>>> and will use the same hole thru the cabin roof as the OEM chainplate.
>> The
>>>> new chainplate will be thru bolted thru the outer cabin side wall.
>>>>
>>>> Roger Pihlaja
>>>> S/V Dynamic Equilibrium
>>>> 1978. Sanford, MI
>>>> Sent from my iPhone
>>>>
>>>>>> On Aug 2, 2024, at 4:46 PM, mm.bizlist1 at gmail.com wrote:
>>>>>
>>>>> Roger and Todd,
>>>>>
>>>>> Before I start cutting holes in my boat, I want to make sure I
>> understand
>>>>> the full process, so please let me know if I am misunderstanding
>>>> anything.
>>>>>
>>>>> The original chainplate is bent in an L-shape and screwed to plywood
>>>> inside
>>>>> the ceiling of the cabin with one or two wood screws.  To remove the
>> old
>>>>> chainplate, you need to open a hole in the ceiling liner.  In Todd's
>>>> case,
>>>>> he also needed to open some of adjacent sidewall of the cabin to gain
>>>>> sufficient clearance to extract the old chainplate.  Roger, did you
>> need
>>>> to
>>>>> do that also, or did you use a different approach?
>>>>>
>>>>> In any event, the hole in the ceiling needs to be repaired afterwards.
>>>> Was
>>>>> there much difficulty in achieving a clean repair of the ceiling liner?
>>>>>
>>>>> A second hole of the correct size for the deckplate inspection port is
>>>>> drilled in the inside sidewall liner below the chainplate opening.  A
>>>>> backing plate (1/4" plywood?) is epoxied inside of the outer layer of
>> the
>>>>> cabin sidewall.  The new chainplate is through-bolted to the backing
>>>> plate.
>>>>> Finally, the deckplate is installed to the inside liner of the cabin as
>>>> an
>>>>> inspection port.
>>>>>
>>>>> Is the above description correct?
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Mike
>>>>>
>>>>> -----Original Message-----
>>>>> From: Rhodes22-list <rhodes22-list-bounces at rhodes22.org> On Behalf Of
>>>> ROGER
>>>>> PIHLAJA
>>>>> Sent: Friday, August 2, 2024 12:59 PM
>>>>> To: 'The Rhodes 22 Email List' <rhodes22-list at rhodes22.org>
>>>>> Subject: Re: [Rhodes22-list] How to replace forward lower chainplates?
>>>>>
>>>>> You use something like a hole saw to make a 4-1/2" ID hole in the cabin
>>>>> liner.  This will expose the plywood core and the old chainplate.
>> Remove
>>>>> the old chainplate and any plywood that's in the way, install a new
>>>>> chainplate made of straight SS bar stock, (Note that this new
>> chainplate
>>>>> goes thru the original hole in the cabin roof)  and thru bolt it thru
>> the
>>>>> outer cabin wall.  Then, install the Beckson inspection plate.  Easy
>>>> peasy,
>>>>> it takes about 30 minutes to do each chainplate.  You can easily do
>> all 4
>>>>> inner chainplates in an afternoon.  Other than two round head machine
>>>> screws
>>>>> + fender washers on the side of the cabin at each chain plate and 4
>>>> Beckson
>>>>> inspection plates in the cabin, the  installation will look stock.
>> But,
>>>> you
>>>>> will be able to inspect/repair/replace the 4 inner chainplates whenever
>>>> you
>>>>> want.
>>>>>
>>>>> Roger Pihlaja
>>>>> S/V Dynamic Equilibrium
>>>>> 1978  Sanford, MI
>>>>>
>>>>> Roger Pihlaja
>>>>>
>>>>> ________________________________
>>>>> From: Rhodes22-list <rhodes22-list-bounces at rhodes22.org> on behalf of
>>>>> mm.bizlist1 at gmail.com <mm.bizlist1 at gmail.com>
>>>>> Sent: Friday, August 2, 2024 12:40 PM
>>>>> To: 'The Rhodes 22 Email List' <rhodes22-list at rhodes22.org>
>>>>> Subject: Re: [Rhodes22-list] How to replace forward lower chainplates?
>>>>>
>>>>> Roger, how did you remove the existing chainplates?  Did you have to
>>>> open up
>>>>> the cabin liner?
>>>>>
>>>>> -----Original Message-----
>>>>> From: Rhodes22-list <rhodes22-list-bounces at rhodes22.org> On Behalf Of
>>>> ROGER
>>>>> PIHLAJA
>>>>> Sent: Tuesday, July 30, 2024 11:47 AM
>>>>> To: The Rhodes 22 Email List <rhodes22-list at rhodes22.org>
>>>>> Subject: Re: [Rhodes22-list] How to replace forward lower chainplates?
>>>>>
>>>>> Hi All,
>>>>>
>>>>> One of the first things I replaced when I bought my boat back in 1987
>>>> were
>>>>> the four lower chainplates.  There is no way to inspect the factory OEM
>>>>> lower chainplates.  Sooner or later, water is going to infiltrate into
>>>> the
>>>>> plywood core, causing it to rot.  This is easily fixed by installing 4
>>>>> Beckson 4-1/2" white screw-out deck plates (Beckson P/N: DP40-W,
>> Defender
>>>>> Marine C/N: 941619, $17.36 each + S&H) thru the cabin liner.  With
>> these
>>>>> inspection plates installed, you can thru bolt the lower chainplates
>> thru
>>>>> the outer cabin wall and easily inspect them whenever you wish.  I do
>> not
>>>>> trust wood screws into the plywood core for this heavily loaded
>>>> component,
>>>>> especially not when the fix is so easy.  Just bite the bullet and do
>> this
>>>>> upgrade.  You'll never have to worry about it again.
>>>>>
>>>>> Roger Pihlaja
>>>>> S/V Dynamic Equilibrium
>>>>> 1978  Sanford, MI
>>>>> ________________________________
>>>>> From: Rhodes22-list <rhodes22-list-bounces at rhodes22.org> on behalf of
>>>> Graham
>>>>> Stewart <gstewart.gm at gmail.com>
>>>>> Sent: Tuesday, July 30, 2024 10:16 AM
>>>>> To: The Rhodes 22 Email List <rhodes22-list at rhodes22.org>
>>>>> Subject: Re: [Rhodes22-list] How to replace forward lower chainplates?
>>>>>
>>>>> The chain plate is a bent stainless-steel tang. Mine was held in place
>>>> with
>>>>> a single screw into the plywood core of the cabin top. I have attached
>> a
>>>>> picture of the chainplate. Knowing the width, you should be able to
>>>>> calculate pretty accurately where the screw would be. Removing a
>> section
>>>> of
>>>>> the liner should allow you to remove the screw without needing to
>> create
>>>> a
>>>>> large hole.
>>>>>
>>>>>
>>>>> Graham Stewart
>>>>> Rhodes 22
>>>>> Agile, 1976
>>>>> ________________________________
>>>>> From: Rhodes22-list <rhodes22-list-bounces at rhodes22.org> on behalf of
>>>>> Michael McKay <mm.bizlist1 at gmail.com>
>>>>> Sent: Sunday, July 28, 2024 4:59 PM
>>>>> To: rhodes22-list at rhodes22.org <rhodes22-list at rhodes22.org>
>>>>> Subject: [Rhodes22-list] How to replace forward lower chainplates?
>>>>>
>>>>> Hi Rhodies,
>>>>>
>>>>> I damaged one of my forward lower chainplates and need to replace it.
>>>>>
>>>>> It  is evidently attached to something between the inner and outer
>>>>> fiberglass skins, so my plan would be to cut an access hole from the
>>>> inside.
>>>>>
>>>>> Can you provide any guidance about how best to approach this project?
>>>>>
>>>>> Thank you!
>>>>>
>>>>> Mike McKay
>>>>> S/V Liber 2006/2108
>>>>> Allatoona Lake, GA
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Michael McKay
>>>>> (630) 209-2054 (m)
>>>>>
>>>>> Sent from my iPhone
>>>>> -------------- next part --------------
>>>>> A non-text attachment was scrubbed...
>>>>> Name: Chainplate.JPG
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>>>>> Desc: Chainplate.JPG
>>>>> URL:
>>>>> <http://rhodes22.or/
>>>>>
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