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Thread: Plywood 5/16 ????

  1. #1
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    Default Plywood 5/16 ????

    If the plans specify 5/16", which isn't readily available in the Midwest, nor is any marine plywood for that matter, what's the best direction to go? 3/8" or 1/4" w/fiberglass/dynel/??? I'd like to use local materials, feels like the right thing to do, but....

  2. #2
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    Default Re: Plywood 5/16 ????

    Think Metric...

  3. #3
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    Default Re: Plywood 5/16 ????

    I think I might ask the designer. Don't know of any source of 5/16" plywood to be found anywhere. On the face of it, it looks as if the designer might have calculated 5/16" thickness without knowing what is available. Not a good sign if true. Two layers of 4mm is very close to 5/16" but that is the hard way round. Not to mention an expensive route.
    Tom L

  4. #4
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    Default Re: Plywood 5/16 ????

    What design is it?

  5. #5
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    Default Re: Plywood 5/16 ????

    Its the Whilly Boat, Ian's design.

  6. #6
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    Default Re: Plywood 5/16 ????

    Quote Originally Posted by crank172 View Post
    Its the Whilly Boat, Ian's design.
    Maybe 5/16 is available in Ian's location.
    Tom L

  7. #7
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    Default Re: Plywood 5/16 ????

    I see 9MM Okume, which is only a few hundredths thicker than 5/16", avalable here...

    http://www.getwood.com/details_okoume.asp

    I'm not sure of their shipping policy, but it's a good place to start.

  8. #8
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    Default Re: Plywood 5/16 ????

    6mm = .236
    1/4 = .250
    5/16 = .3125
    8mm = .315
    9mm = .354

    Since AFAIK nobody makes 8mm, and I've never seen 5/16 fir in the US (can't find it in a brief web seach either) I'd say the 9mm is your best bet. It's 13% heavier than equivalent 5/16 ply. I expect the weight won't matter in the Whilly boat. It will be significantly more rigid (about 1.5X); maybe a problem with the garboards? How much twist do they have?

    You could look at Noah's: http://www.noahsmarine.com/html/united_states.html Where are you located?

    "For a successful technology, reality must take precedence over public relations,
    for nature cannot be fooled."

    Richard Feynman

  9. #9
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    Default Re: Plywood 5/16 ????

    ....in Chicago, looks like I need to contact the 'coasts' & have it shipped in...i can only find 1/4 & 1/2 in town.

  10. #10
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    Default Re: Plywood 5/16 ????

    IN the great lakes region there is a branch of a source that some use in the southeast region that maybe close enough to take a drive and pick it up.




    http://www.worldpanel.com/


    GREAT LAKES: 929, Elliott Road, Albion, MI 49224


    From 94, take exit 119 if heading east from Battle Creek, follow 26 and make a left onto W Michigan Ave. Follow about 1.5 miles and make a right on Elliott Road. Building is abt. 200 yards on the left side - you can't miss it.

    From 94, take exit 121 if heading west from Detroit, make a right after 1st stop and another right towards McDonalds (Eaton Street), follow to 2nd light and make a right down Austin Ave. Go through 1 light (which turns to Michigan Ave) and continue until you see Culligan (blue buildings) on the left side, Elliott Road is immediately after Culligan. Make a left and building is abt. 200 yards on the left side - you can't miss it.

  11. #11
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    Default Re: Plywood 5/16 ????

    The 9mm okoume will probably weigh less than 5/16 fir (if such a thing is actually made). I'd go that route rather than under-sizing and adding glass.

  12. #12
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    Default Re: Plywood 5/16 ????

    Douglas fir ply has a density of .58, okoume is .51, so 9mm okoume is lighter than 5/16 fir. Besides, fir plywood is nasty stuff unless glassed. It will check whatever you do.

    "For a successful technology, reality must take precedence over public relations,
    for nature cannot be fooled."

    Richard Feynman

  13. #13
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    Default Re: Plywood 5/16 ????

    Shelman marine makes 6, 7, 8, and 9.5 mm Okoume. i just got some 8 for a set of garboards. Very nice wood.

    Clint
    Clinton B. Chase
    Portland, Maine

    http://tinyurl.com/myboats

  14. #14
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    Default Re: Plywood 5/16 ????

    My goodness, genuine 8mm! And Shelmarine is first class wood, although at $110/sheet, it had better be! Here's the page at Harbor Sales:
    http://www.harborsales.net/lookups.c...arine%20Panels
    By way of comparison, BS6566 9mm 7-ply Meranti from Noah's is $39/sheet.
    http://www.noahsboatbuilding.com/noa...tatus=0&Tp=&Bc=

    "For a successful technology, reality must take precedence over public relations,
    for nature cannot be fooled."

    Richard Feynman

  15. #15
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    Default Re: Plywood 5/16 ????

    The new 3/8 plywood is 11/32 . so just think that you are just increasing the thickness a little

  16. #16
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    Default Re: Plywood 5/16 ????

    Johnson Lumber might be a good source. They are headquartered in Charlotte, MI (Lansing area) but have outlets in Grand Rapids and South Bend, Indiana.


    L.L. Johnson Lumber Manufacturing Co.

  17. #17
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    Default Re: Plywood 5/16 ????

    Thanks for all of the suggestions, looks like I'm heading to South Bend, have everything i need, very helpful over the phone.....Thx

  18. #18
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    Default Re: Plywood 5/16 ????

    BTW....i'm thinkin' metric....

    thx canoeyawl.

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