I would love to see pics of your modification. I reinforced my mast support beam with Steve Birch's Stainless plate on the fore as well as a 5/16" 5056 aluminum plate thru bolted on the aft beam. Epoxy primer sealed. I also glued 1/2" marine plywood to the bulkheads under the settee, form fitted to increase the bulkhead footprint and then replaced the bulkhead fasteners with 1/4" stainless bolts all around. The original bulkhead fasteners were bent and the holes elongated. I had also considered attaching stringers to the forward side of the bulkheads (diagonal) to decrease its bowing action but wondered if this was overkill. Any thoughts? From: "John Kinsella John.Kinsella@... [AlbinVega]"
AlbinVega@yahoogroups.com To:
AlbinVega@yahoogroups.com Sent: Friday, March 10, 2017 12:48 AM Subject: Re: [AlbinVega] Bulkhead. Thickness
Joe,
I'll get a few pics at weekend.
Re mast support beam, the original msb was first reinforced by the
stainless steel piece (with same cross section shape) then replaced
by a thicker piece, again with the stainless steel piece bolted to
it.
In both cases the ss piece was bolted through the forward face of
the mast support beam.
The berths are covered by a piece of thin (?5mm) ply that is
supported by a piece of softwood at forward end Port & Stbd.
This was screwed to the bulkhead so all that the fitter had to do
was remove the softwood blocks, shorten the berth ply by 10-15 mm,
secure the new bulkhead to the old (lots of "manhours") then
resecure the softwood blocks to aft face of new bulkhead and
resecure the (now 10 mm shorter) berth bases to the softwood blocks.
The side panels also had to be shortened ("rebated" is the word that
the fitter used) at forward end by 10-15 mm to allow the new
bulkheads to be inserted aft of the old ones and then "glued and
bolted" in place.
Hope I have understood your question?
Re the flanges on deck (inside the underwater hull) to which the
bases of the bulkheads are secured, yes the new bulkheads are also
through bolted (with longer bolts) through both the new & old
bulkheads to the flanges.
Of course the rigging had to be completely slackened off & the
mast support beam jacked up with a "bottle jack" to allow the work
to be done.
The glassing where forward face of mast support beam meets the
inside of coach roof was done with "woven roving" (strips of glass
fibre matting wetted with resin). This was covered with gel coat
when dry - probably the least visually ok part of the job but I
rarely look at the forward face of the msb..
(Even though it was expensive, I believe the fitted earned his money
& I couldn't have done the job on my own & even with a
helper I wouldn't have done it as well.)
As always, these projects are difficult to describe unless you are
looking at them...
John
On 09/03/17 21:46, joseph mendiola
jam9991@... [AlbinVega] wrote: