[Public-List] Knee replacement

[Mike Lehman]

Actually Bob, the original bulheads were teak veneer

 
Mike Lehman 

 
><((((º>`·.¸¸.·´¯`·.¸><((((º>`·.¸¸.·´¯`·.¸><((((º>
 
 






 
> Date: Wed, 1 Apr 2009 16:47:28 -0300
> From: bob at fox.nstn.ca
> To: public-list at lists.alberg30.org
> Subject: Re: [Public-List] Knee replacement
> 
> Hi All,
> 
> After discussing my bulkhead problem (#560) with a local "Navel"
> Architect...
> He recommended Lloyds of London Construction grade 3/4" Mahogany plywood.
> He also stressed the issue of chainplates fastening to bulkhead and thus
> required a certain spec of plywood. The original bulkhead was teak but was
> not available so I used the Mahogany plywood.
> I used epoxy sealer on the plywood with extra applications to the end grain.
> 
> -bob
> 
> 
> -----Original Message-----
> From: public-list-bounces at lists.alberg30.org
> [mailto:public-list-bounces at lists.alberg30.org] On Behalf Of Hugh McCormack
> Sent: March 31, 2009 4:41 PM
> To: public-list at lists.alberg30.org
> Subject: [Public-List] Knee replacement
> 
> 
> Good day all,
> 
> 
> 
> The recent thread concerning chain plates and weak knees due to water
> infiltration (water in the knees...no wonder we think of boats as living
> things) and the parallel discussion about the strength of plywood or
> hardwood prompts my questions.
> 
> 
> 
> Has anyone replaced their knees (and/or bulkheads) with new ones made of
> King Starboard? If so, what is the relative strength of Starboard compared
> to plywood or hardwood?
> 
> 
> 
> I have searched the list archives but can find no discussion of the use of
> King Starboard except for replacement of the spacers under the jib or genoa
> tracks. The King website says that the product's tensile strength is 4100
> psi but they don't say for what thickness of material. If this applies to
> 3/4" material then it appears to be considerably stronger than plywood. It
> also suggests that thinner material could be used in a repair/replacement.
> 
> 
> 
> Does anyone have any experiences or thoughts?
> 
> 
> 
> Cheers,
> 
> 
> 
> Hugh
> 
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