An iten in another thread you might consider. In the "Engine/Boiler Recommendation" thread the use of bilge keels is outlined for engine/boiler mounting optipns (see section drawing in Engine/Boiler Recommendation). If you do not want bilge keels, then an external flat bar can be used, either way you get more structural integrity in attaching the engine-boiler stringers to the fiberglass hull.
Red Oak rots in no time at all, while I am told that real White Oak is one of the best woods for resisting rot. My stringers are pressure treated Home Depot wood (species unknown), and are holding up well after 5 years service.
stringers (engine bearers)
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fredrosse
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Re: stringers (engine bearers)
- Attachments
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- Bilge Keels - Bolt Thru to Engine Bearers.
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Aheadslow
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Re: stringers (engine bearers)
If Using wood for the stringers a few things to remember. Some of the woods considered rot resistant are Cedar, oak, redwood, walnut, and cypress .
There are many other rot resistant woods available ( list is only an example) . First thing to remember is that sapwood of any species is not rot resistant. ( sapwood being the outermost layer of the tree) Only the heartwood is. Old growth trees are mostly heartwood, while in second growth, or faster growing, younger trees , most of the wood is sapwood. Thats going to be pretty much anything you get from Lowes or any regular lumber yard. The best way to get good rot resistant wood is too find a supplier that carries reclaimed wood. Deadhead Cypress from Florida is really great stuff. It is Old growth wood that has been lying on the bottom for a very long time (that is until some enterprising fellow hauled it up and milled it.) In the Northwest it is common for people to recover logs that sank when being rafted down rivers and estuarys. An inter net search for reclaimed lumber will find many suppliers for these types of old growth lumber. While the cost can be a little higher ,it is more than made up for by the strength and durability of this type of lumber. Old barns are also a good source for this sort of lumber. Here is a link for the type of stuff I'm talking about
http://crossroadslumber.com I hope you find this useful .
There are many other rot resistant woods available ( list is only an example) . First thing to remember is that sapwood of any species is not rot resistant. ( sapwood being the outermost layer of the tree) Only the heartwood is. Old growth trees are mostly heartwood, while in second growth, or faster growing, younger trees , most of the wood is sapwood. Thats going to be pretty much anything you get from Lowes or any regular lumber yard. The best way to get good rot resistant wood is too find a supplier that carries reclaimed wood. Deadhead Cypress from Florida is really great stuff. It is Old growth wood that has been lying on the bottom for a very long time (that is until some enterprising fellow hauled it up and milled it.) In the Northwest it is common for people to recover logs that sank when being rafted down rivers and estuarys. An inter net search for reclaimed lumber will find many suppliers for these types of old growth lumber. While the cost can be a little higher ,it is more than made up for by the strength and durability of this type of lumber. Old barns are also a good source for this sort of lumber. Here is a link for the type of stuff I'm talking about
http://crossroadslumber.com I hope you find this useful .Human beings have an inalienable right to invent themselves.
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JonRiley56
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Re: stringers (engine bearers)
At the risk of sounding sacreligious, why not pressure treated if it is going into a fiberglass hull ?
jon
jon