[Rhodes22-list] John - cockpit sleeping - reinforce the lip of the seats

[Tootle]

John,

To solve Roberts dilemma, get slow setting epoxy (need slow or extra slow
because of ambient temperatures), small chip brush and some Kevlar tape (
see: http://www.raka.com/Kevlar.html). 

Remove wood strips from outside.  

Coat the inside/underside of the lip with epoxy and apply tape to reinforce. 
Let harden but not cure, apply second coat of epoxy and second layer of
tape.  Let harden and apply another layer of just epoxy to smooth surface. 
Let dry and cure and redrill the screw holes.  Reattach wood strips.

In repair jargon, one layer of epoxy and one layer of polyester tape is
considered equivalent to ¼” of marine plywood.  So you would be adding
equivalent of ½” of plywood reinforcement around edge of seats.  If you are
as big a Robert claims he is, you may want to double these instructions, and
even add reinforcing ribs (aka stringers) under the seats.  

And still if in doubt, you can do as previous owner of my boat did, and add
stainless steel seat supports.  Now all you need is mosquito netting.
Previous discussions on this forum have given many suggestions therefore.

Ed K
Greenville, SC, USA
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Axis+of+Evil.jpg 




Robert Skinner wrote:
> 
> John,
> 
> I believe that momentary loads could easily exceed 
> 600 lbs, given that a binary mass is in a high energy 
> oscillating state.  It may be appropriate to apply 
> stiffeners at all the points of contact, particularly 
> if the wood is not thick and strong.
> 
> /Robert
> ------------------------------------------------------
> John Lock wrote:
>> 
>> At 07:06 PM 7/6/2008 -0700, John Shulick wrote:
>> >John my concern with your modification is can that teak strip hold up
>> under
>> >the combined weight of you and whoever doing whatever under the stars
>> and
>> >such. For myself and the wife this would require at least 1/4" bolts
>> running
>> >every foot or so along the teak strip before I would trust it. Why mark
>> up
>> >such a nice trim piece when you are using the inflatable mattress to
>> make up
>> >any differences in heights? If you do manage to shift the plywood while
>> >under load then I salute you you salty old dog!!!
>> 
>> I've been thinking about that potential problem as well.  The load
>> would be mostly a sheering force (downward, at right angles to the
>> fasteners) and spread fairly evenly across about 15 linear feet of
>> trim.  So the individual point loads would not be that great.  The
>> existing fasteners will probably hold.  My bigger concern is if the
>> plywood flexes too much.  It could be forced off the trim altogether,
>> dumping you on the cockpit floor.  Fortunately I don't see more than
>> 300lbs sleeping on there, so it may not be a big issue.  But rigorous
>> testing will have to be performed!
>> 
>> Cheers!
>> 
>> John Lock
>> ~~~~~~~~~~~~~~~~~~
>> s/v Pandion - '79 Rhodes 22
>> Lake Sinclair, GA
>> ~~~~~~~~~~~~~~~~~~
>> 
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> 
> -- 
> Robert Skinner  "Squirrel Haven" 
> Gorham, Maine         04038-1331
> s/v "Little Dipper" & "Edith P."
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