Touché's step is an aluminum box made from 1.5 inch angles sitting on a solid block of fiberglass. It will exist for millennia.
Make sure you measure everything to a good reference point. FYI, white oak would be one of my choices. When encapsulating it, consider using epoxy thickened with microfibers or use thin glass cloth. Epoxy by itself has little strength and will crack with stress and allow moisture to penetrate. Dennis C. Touché 35-1 #83 Mandeville, LA Sent from my iPhone On Aug 6, 2013, at 7:06 PM, Knowles Rich <r...@sailpower.ca> wrote: > I'm all for using wood for many things, but it seems to me that the amount of > stress the mast step is subjected to is a good reason to build the > replacement out of aluminum. Any small welding shop should be able to > fabricate a substitute for the original wood structure at very little cost > that could then be epoxied into place and should outlast the boat. > > Rich Knowles > Indigo. LF38 > Halifax > > On 2013-08-06, at 20:37, "Persuasion" <persuasio...@gmail.com> wrote: > > As always Google has the answer. > > http://workshopcompanion.com/KnowHow/Design/Nature_of_Wood/3_Wood_Strength/3_Wood_Strength.htm#strengthchart > > Mike > S/V Persuasion > C&C 37 Keel/CB > Long Sault >> From: Steve Thomas <sthom...@sympatico.ca> >> Date: 6 August, 2013 19:15:01 EDT >> To: <cnc-list@cnc-list.com> >> Subject: Re: Stus-List C&C 30 mast step yet again >> Reply-To: cnc-list@cnc-list.com >> Maple is not very rot resistant, but oak is. >> There is a reason why oak was the material of choice for ship building. >> >> -----Original Message----- >> From: CnC-List [mailto:cnc-list-boun...@cnc-list.com]On Behalf Of Ronald B. >> Frerker >> Sent: Tuesday, August 06, 2013 4:24 PM >> To: cnc-list@cnc-list.com >> Subject: Stus-List C&C 30 mast step yet again >> >> Got the engine running, so I could shift the mast over to work on the step. >> (BTW trouble was in the battery cables; corrosion inside the sheathing). >> I have only two supports and the oak plank I used bowed in the middle; >> probably because I didn't seal the edges well enough and water wicked in. >> It did last 10-15yrs though. So based on what a lister mentioned, I'm going >> to put in a third support in the middle. I can only buy 3/4 marine plywood >> by 4x8 sheet. So I'm going with solid wood for the support. The hardwoods >> dealer suggested mahogany, but it seems to porous for a bilge. A friend >> suggested ipe (epay or ironwood). Extremely dense and used in lock gates on >> the river. He claimed that some don't even treat it. >> I'm using maple (very dense) instead of the oak I used last time for the >> horizontal plank; oak apparently is known to bend readily with moisture, >> especially steam. >> I'm planning to coat all with a few coats of epoxy which I think Dennis >> suggested; the hardwoods dealer suggested marine poly. >> So, given I'm going with wood instead of a wood/metal combination, are there >> any suggestions about which wood and the coating? >> Ron >> Wild Cheri >> STL >> _______________________________________________ >> This List is provided by the C&C Photo Album >> http://www.cncphotoalbum.com >> CnC-List@cnc-list.com > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com
_______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com
