11118RE: [MedievalSawdust] Wood load strength
- Mar 1, 2009
For more Specific information look into testing of wood for Airplanes. They have jigs you can make to test the strength of structural pieces and grow rings per inch required for thing like spars and longerons...of course that is mainly for spruce!
Still hoping to fly a Pits Special
From: firstname.lastname@example.org [mailto: email@example.com ] On Behalf Of James Winkler
Sent: Sunday, March 01, 2009 1:38 PM
Subject: RE: [MedievalSawdust] Wood load strength
There are probably sources for generic information. .. but too much is involved in calculating the angle of load to the grain, the quality of the stick in general, the overall geometry and weight dispursion of the structure in general, etc., etc... There's also the question of whether you're talking 'loading' or 'shear' strenght...
Inherently, the weakest part of this design is the pivot point at which the legs cross. the wood is thinest there and you have those pesky grain issues that come into play... not to mention the fact that that is the EXACT point at which all of those "pounds per square inch" are maximized into the the fewest possible square inches....
So... what we're really talking here is the shear strenght of the wood along the grain at this point... and I don't think your going to find that anywere... at least not specific to whatever stick your using.
To: medievalsawdust@ yahoogroups. com
From: talmoor@yahoo. com
Date: Sun, 1 Mar 2009 17:54:06 +0000
Subject: [MedievalSawdust] Wood load strength
Does anyone have a good site or book for figuring the weight load a
piece of wood can take? I am making a dantesca chair and wonder how
much of a limit it can take and if there is any way to strengthen it.
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