In message , John
Rumm ) wrote:
Andy Burns wrote:
N. Thornton wrote:

http://www.woodbin.com/calcs/sagulator.htm

FX: cacophony of mouse clicks hitting "add bookmark" ;-)

Hmm, not wanting to **** on that particular firework, but having just
done a side by side calculation against Superbeam, the web site seems
to
get the wrong answer.

I did a calculation on a "shelf" (i.e. a joist) made from "Pine,
Spruce", with a distributed total load of 240kg over its 4m length
(i.e.
0.6kN/m) and a size of 200x50mm. The web site calculates just under
7mm
deflection. Superbeam gets approaching double that.

(all the sums done on the web site seem to be embedded in a few pages
of
(obfuscated) javascript. If one CBA, one could extract the logic and
see
what it is doing).


I'm going to pull a microsoft on you...

1. Since IRL the deflections we're using are small anyway, it doesnt
really matter if it the answer is out by a factor of 2, all will still
work ok.
2. If people dont know it gives the wrong answer, who cares anyway

/tongue cheek

NT