[Public-list] chainplates/bolt size

[John Birch]

We've had a couple of boats up here on the great lakes that have popped a 
chain plate right out that I know of. Highly recommend 5/16 to 3/8 bolts - 
the size will be determined by the amount of bending you find in your 1/4 
machine screws.

The amount of bending will chew up your bulkhead taking them out - thus 
determining what size you put back in - you will need to drill the holes in 
the same location.

You absolutely should at least replace the uppers - ideally the lowers too.

You will be horrified to see how bent the old bolts actually are - or do 
nothing and worry in a breeze.

My advice - change 'em and put backing plates or very large washes in too.

Hope this is a help.

Cheers,

John
----- Original Message ----- 
From: "Roger L Kingsland" <rkingsland101 at ksba.com>
To: "Alberg 30 Public List -- open to all" <public-list at alberg30.org>
Sent: Wednesday, October 05, 2005 8:01 AM
Subject: Re: [Public-list] chainplates/bolt size


> Dan,
>
> Only failure I know of is when Yves Gélinas lost the mast on Jean-Du-Sud
> while in the southern ocean.  Chain plate pulled out of the deck; 
> timberrr.
> Perhaps reliance on the "if it ain't broke, don't fix it" philosophy 
> should
> be disproportional to the distance one ventures from shore.
>
> Roger
>
>
>
>
> Roger Kingsland
> Managing Partner
> KSBA Architects
> N40°- 27.83'  W79°- 57.99'
>
> (412) 252-1500 x101 office
> (412) 779-5101 cell
> ----- Original Message ----- 
> From: "dan walker" <dsailormon at yahoo.com>
> To: "Alberg 30 Public List -- open to all" <public-list at alberg30.org>
> Sent: Tuesday, October 04, 2005 10:04 PM
> Subject: [Public-list] chainplates/bolt size
>
>
>> i know everyone recommends increasing the size of the hardware attaching
> the chainplates to the bulkheads, but has there ever been a documented
> failure.?i was staring at mine and they "appear" fine, but of course i
> cannot see what is in the wood.
>>
>> also, a pretty good squeeze for a fat guy like me in the hanging locker.
>> oh yeah, i am also re learning the old saying, if it aint broke dont fix
> it
>> dan
>> rascal 145
>>
>>
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