Thank you Ken.. Very helpful. I will take another look. I do have an access hole drilled thru one of the stringers to be able to torque one of the bolts, If I recall it is not hollow. There are also bilge drain holes from bay to bay, again they are not hollow.
I agree the drawings show no material inside, but then what would the mast step plate be screwed to? My concern is that they are bulging. I take it yours don't have the bulging issue? Any thoughts on injecting epoxy? Thanks again. > Message: 4 > Date: Wed, 11 Apr 2018 06:27:52 -0300 > From: Ken Heaton <kenhea...@gmail.com> > To: cnc-list <email@example.com> > Subject: Re: Stus-List Mast step stringers > Message-ID: > <CAAbfP6TcwvtcRwgE5Y3X_1k3t21An8XBkDf6XQzJY9RkKuyRAA@ > mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Hello Brian, > > I would be very surprised to find there was any wood inside the 'stringers' > on a C&C 37/40. There is no mention of wood used in any part of this > boat's construction anywhere (except in the sole, in bulkheads and > cabinetry) in any documents I have see for these hulls. > > I was sure the `stringers` were either completely hollow or there was > perhaps foam inside, but only to hold their shape while they are tabbbed to > the hull on initial construction. One `stringer` just aft of the two that > support the mast step, has a large hole drilled in the top to access a keel > bolt. It is completely hollow. > > > Here is a link to the construction drawing for that hull: > > Here: https://drive.google.com/file/d/0B7X4Y5iVFYAKYTJxRDJBc3BvLWM/ > view?usp=sharing > > and here: https://drive.google.com/file/d/0B7X4Y5iVFYAKcDd4ZlhWNGZzdmM/ > view?usp=sharing > > Ken H. > > > > On 10 April 2018 at 22:37, Brian Fry via CnC-List <firstname.lastname@example.org> > wrote: > > > 1993 37/40. > > Redoing the rod rigging, mast is down. Removed the aluminum mast step to > > media blast and powder coat. > > There are three `stringers` the mast step sits on. The forward and aft > > stringers,which the step is bolted to, are bulging. Tapping on them > reveals > > a delamination inside. > > I am thinking this is caused by forces from the adjustable mast crushing > > the laminate wood inside. The bay this is in is too high to be caused by > > water intrusion. > > Anyone else experiencing this? > > The plan is to drill holes and inject epoxy, then bolt on a suupport > piece > > of 1/2" aluminum across the face, bolted into the solid parts of the > > stringer. > > Any input is welcome. > > > > S/V La Neige > > 1993 C&C 37/40 XL > > Havre de Grace , MD > > FB blog : thenext14years > > Brian and Manon > > > > _______________________________________________ > > > > Thanks everyone for supporting this list with your contributions. Each > > and every one is greatly appreciated. If you want to support the list - > > use PayPal to send contribution -- https://www.paypal.me/stumurray > > > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://cnc-list.com/pipermail/cnc-list_cnc-list. > com/attachments/20180411/f086594e/attachment-0001.html> > > ------------------------------ > > Message: 5 > Date: Wed, 11 Apr 2018 09:20:27 -0300 > From: Ken Heaton <kenhea...@gmail.com> > To: cnc-list <email@example.com> > Subject: Re: Stus-List Mast step stringers > Message-ID: > <CAAbfP6TpLoKmqxxSubHrhWFnWRYdPGws7Ws9pevyadBLR06CeA@mail. > gmail.com> > Content-Type: text/plain; charset="utf-8" > > Part 2 > > Hi Brian, > > The 'stringers' you refer to are the Structural Floors I think. Those > drawings can be downloaded from the links provided. They are big, about 3' > by 4' so it is best to download them and view them in a pdf viewer that > will let you zoom way in. > > There is a detail on those drawings as follows: > > STRUCTURAL FLOORS > 1. 2 LAYERS KEVLAR HYBRID > 2. 1 LAYER KEVLAR HYBRID ON TOP ONLY > 3. 3 LAYERS OF 18oz./1oz. FABMAT > > Here is a link to that detail from the Construction Drawing: > https://3.bp.blogspot.com/-ZlxOeqGWYe0/Ws39SyZcQGI/AAAAAAAB1fc/ > 0fUCvVSqzqYEHiiwFZ67HeLvKyk0Lsr1gCLcBGAs/s1600/Construction% > 2BDetail%2Bfor%2Bthe%2B37%252B%2BMay%2B28%252C%2B1988-1.jpg > > Ken H. > > >
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