[Rhodes22-list] cockpit sleeping

[Robert Skinner]

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."