Have been thinking about your post Greg. Remember, the 33-2 mast step is not only compressed by the mast, it also bears the compression load of one of the four large keel bolts. Don't only think of the rig.... Fellow lister Doug A quite wisely convinced me to install compression posts when I rebuilt my keel, and the pro repair by Bristol marine here in Toronto does the same.
Dave. Sent from my iPad > On Jun 27, 2017, at 1:59 PM, Hoyt, Mike <mike.h...@impgroup.com> wrote: > > Don’t fill in the hole. Use it for beer storage! > > From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Greg > Sutherland via CnC-List > Sent: Tuesday, June 27, 2017 12:24 PM > To: cnc-list@cnc-list.com > Cc: Greg Sutherland > Subject: Re: Stus-List 33 mk2 Mast step loads > > 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 > <cnc-list@cnc-list.com> wrote: > > I used a total of ½” aluminum on mine when I rebuilt it. It looks about 20 > times stronger than the original was too. > > Joe > Coquina > CC&C 35 MK I > > > From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Russ & > Melody via CnC-List > Sent: Monday, June 26, 2017 9:18 PM > To: cnc-list@cnc-list.com > Cc: Russ & Melody <russ...@telus.net> > Subject: Re: Stus-List 33 mk2 Mast step loads > > > Hi Greg, > > You can research the righting moment, at say 30 - 33 degrees, for various > boats in your size range for a second opinion. The 33-2 is similar in > stability to my 35 mk-1(check diagram in the Technical Info on Stu's CNC > site). > > I put the load at about 10,000 lbs, so building for 12 - 15,000 lbs is not a > unreasonable. If you're going with aluminum only then I would spec it at > 20,000 for a 50% corrosion allowance and say, "I expect this to last another > 20 years." > > BTW, check with Rich Knowles on my credentials, if in doubt. :) > > Hi Rich, we miss you on the Left Coast. > > Cheers, Russ > Sweet 35 mk-1 > > At 03:15 AM 26/06/2017, you wrote: > > > Does anyone know what the maximum load would be on the mast step of the 33? > I'm trying to figure out the psi force for a rebuild > Thanks! > > Greg > 33-2 > Halifax > _______________________________________________ > > This list is supported by the generous donations of our members. If you wish > to make a contribution to offset our costs, please go to: > https://www.paypal.me/stumurray > > All Contributions are greatly appreciated! > _______________________________________________ > > This list is supported by the generous donations of our members. If you wish > to make a contribution to offset our costs, please go to: > https://www.paypal.me/stumurray > > All Contributions are greatly appreciated!
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