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Author Topic: Log yield  (Read 685 times)

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Offline OutlawB52

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Log yield
« on: July 06, 2018, 10:58:23 AM »
Is there a general rule of thumb for sawing a 12 " cant out of a log ?  Looking for the minimum diameter .   Yes , I am new. ;D   

Offline btulloh

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Re: Log yield
« Reply #1 on: July 06, 2018, 11:05:41 AM »
18".  Good rule of thumb is that a log will produce a cant that is 2/3 of the log diameter at the small end (inside the bark).  Crooks and defects can change that, but that's the idea.  (The actual ratio for a perfect cylinder is 0.707)

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Offline GAB

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Re: Log yield
« Reply #2 on: July 06, 2018, 11:09:02 AM »
btulloh is correct, however if you are in need of greater accuracy use the square root of 2 divided by 2.
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Offline moodnacreek

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Re: Log yield
« Reply #3 on: July 06, 2018, 01:11:18 PM »
The diagonal of a 12x12 is 17" so that is the absolute dia. of a perfect log [min. dia.]. 18" would be better.

Online Magicman

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Re: Log yield
« Reply #4 on: July 06, 2018, 01:34:41 PM »
A good quick method is bigger so whatever size square cant that you want, divide by 2 and add it to the cant size. Adding another inch gives you some wiggle room.
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Offline Ron Wenrich

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Re: Log yield
« Reply #5 on: July 06, 2018, 04:25:17 PM »
Here's a link to a calculator we have in our toolbox.  Figures the minimum sized log for any size cant.

Log Size
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Offline OutlawB52

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Re: Log yield
« Reply #6 on: July 06, 2018, 06:28:13 PM »
Thanks Gentleman. More than I could ask for. Time to break out the geometry book and read the chapter on circles. 

Offline Larry

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Re: Log yield
« Reply #7 on: July 06, 2018, 09:08:22 PM »
A squared + B squared = C squared.  Not that I was particularity good in math, just had to figure out the down guy length for 3 zillion telephone poles in my prior life.

Of course once you learn the secret formula it makes it easy to lay out square houses, sand boxes, and how big of log is required to get your cant. ;D
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Offline PAmizerman

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Re: Log yield
« Reply #8 on: July 06, 2018, 09:15:40 PM »
And after you've been sawing for a couple years you'll be able to know what you can get from a log just by eying it :laugh:

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