Hi Greg,
If you want to spend extra... we used Pilgrim
Magmaflow epoxy grout under the frame of the
turbogenerater. Excellent flow characteristics if
there is an awkward cavity to reach. It might be
better than traditional grouts during freeze cycles if there is water present.
A little over done for the job perhaps but you will smile.
Cheers, Russ
Sweet 35 mk-1
At 04:38 AM 28/06/2017, you wrote:
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I'm loving your input gentleman,
I agree completely. I come from a construction
background so plan on using a cement type of
mortar used for anchoring large industrial
equipment. Once fully cured it has a load rating
of 8100 lbs/sq in, doesn't shrink and is
unaffected by water. I was certain the loads
wouldn't exceed that but wanted to make
sure. My plan going forward once excavated was
to pour 4-5 " of the mortar to level up the base
and then fabricate a steel post with a bottom
and top plate with a hole for the forward keel
bolt to hold everything in place and then glass
in the top. I was tempted to just fill the
entire cavity with the mortar and move on but
thought the compression post was a better
plan.........until I read what your father said.
Maybe he's right, top it up and call it a day.
The mortar I plan to use is called Sikagrout 212
but states that after 6" of depth you need an
aggregate filler. Maybe something with less
weight could be used to retain strength in the
grout and filling the cavity would definitely be the way to go.
Thought?
Greg
On Jun 28, 2017, at 7:35 AM, Dave S via CnC-List
<<mailto:cnc-list@cnc-list.com>cnc-list@cnc-list.com> wrote:
Greg - agreed with Russ (and Joe.) When I did
mine I briefly went down the calculation rabbit
hole, looking at the properties of materials
etc and I realized there was no way for me to
calculate the hypothetical combined load of
keel bolt torque, mast/rig, and one bolt's
worth of bashing a rock at 4kts. My brain
elected to look at the original construction
and make it stronger (compression posts, epoxy,
carbon fibre....) and move on to other
projects. I used glass and carbon fibre
(recommended by the local composites purveyor)
instead of AL as others have done, but, same
idea. My dad (builder of many boats- now in
NS) suggested concrete as fill and he was probably right.
Dave
---------- Forwarded message ----------
From: "Russ & Melody" <<mailto:russ...@telus.net>russ...@telus.net>
To: <mailto:cnc-list@cnc-list.com>cnc-list@cnc-list.com
Cc:
Bcc:
Date: Tue, 27 Jun 2017 21:52:15 -0700
Subject: Re: Stus-List 33 mk2 Mast step loads
Hi Dave,
Watch those units.
4000 PSI on a 6" x 8" mast step plane is out of
this world for a 33 foot boat.
When I did the mast loading while designing the
rig of my old 60' cruiser it was 100,000 lbs
and he's telling you it's twice that??
I would go with Joe's suggestion of 1/2"
aluminum plate and move on to other projects.
Cheers, Russ
Sweet 35 mk-1
At 08:24 AM 27/06/2017, you wrote:
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Thanks everyone for the info. I spoke with
Danny from Klacko spars yesterday and he's
certain that he would have installed my
original mast in '87. He figures even when
falling into a wave with full sails the forces
wouldn't exceed 4000 psi. Seems light to me but who am I to argue with him.
I thought I notice Mr. Knowles at the club on
the weekend so I'll definitely run it past him - thanks for mentioning that.
I have the entire mast step "excavated" to the
keel and am starting the rebuild. Can't wait for this one to be finished!
Thanks!
Greg
33 mk2
Halifax
On Jun 27, 2017, at 10:52 AM, Della Barba, Joe
via CnC-List <<mailto:cnc-list@cnc-list.com>cnc-list@cnc-list.com> wrote:
I used a total of ýâ aluminum on mine
when I rebuilt it. It lookks about 20 times stronger than the original was too.
Joe
Coquina
CC&C 35 MK I
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_______________________________________________
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make a contribution to offset our costs, please go to:
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