rack spacing [RE-wrenches]

[Jay Peltz, Peltz Power]

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Hi William,

Thanks for the complete info.

jay


On Jul 8, 2006, at 12:39 PM, William Miller wrote:

>
> Jay:
>
> First, figure out how much shadowing you are willing to allow.  Our  
> usual standard is to preserve full sun from10:00 AM to 2:00 PM on  
> winter solstice.  After you decide the hours within which you wish  
> to preserve sun exposure, find out what angle above the horizon the  
> sun will be at that hour.  Try http://susdesign.com/tools.php or,  
> if you want to do this in the field,  download this tool for your  
> Palm pilot:  http://home.znet.com/gregbell5/.
>
> Once  you know the sun angle, you need to solve for the right  
> triangle.  Height is the vertical height of the shade source.   
> Adjacent angle is the sun angle.  The adjacent side is the inter- 
> rack spacing.  For a diagram, got to my resources page and click on  
> Level Ground Trig Solution:  http://mpandc.com/resources/ 
> resources.html.
>
> How adept are you at trig?  If not so much, Plan A is to chalk this  
> out on your driveway.
>
> Plan B is to use a web (http://www.selectsmart.com/darex/ 
> triangle.html) or Palm tool (http://www.multiology.com/palm/ 
> index.htm).
>
> Plan C is old fashioned trig with a calculator.
>
> Good luck and let me know if this helps.
>
> William Miller
>
> PS:  I really recommend the Palm tools.  I can figure out stuff in  
> the field that I used to have to put off until I got back in the  
> office.
>
> WM
>
>
> A


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