Not a detailed how-to tutorial, just a quick check. We've heard they're rigid, and they FEEL rigid, but can we measure it?
https://youtu.be/2JkNi7jIkRE I compared a very simple torsion box to a pine 2x10 by putting them across a 30" span (one at a time) with a dial indicator underneath, and stood right above the indicator. Results? Torsion box deflected .03 inch, 2x10 deflected .1 inch. So yes, torsion box is nice & rigid. In case it matters, the skin of the box is 1/2" plywood and the core grid is 3/4" plywood on 8" centers. The box was assembled with glue, plenty of clamps, and 16 gauge brads shot in with a pneumatic nailer. I like torsion boxes.
I have posted a new video on YouTube. It is a joke (literally), but there's a serious point behind it. Lately I've seen a lot in the social media woodworking world about whether somebody's work is "art" or "craft" and even some stuff about what art is.
Here's the link: https://youtu.be/rclk1Sqbbt8 And almost always, the person making the pronouncements as though they're deep original thoughts has never read anything on the subject, let alone spoken with anyone halfway informed. It bugs me, so I made this video. Here is the description I put on the video:
In July, I used most of my vacation time to go to Wisconsin and hang out in the woods at my shack. I also got in some visits with family and friends, including Mark Duginske, my woodworking mentor and good friend. One result of the day I spent with Mark in Wausau and at his shop near Merrill is this video. We had a good time making it.
I've been a professional woodworker for two decades, the past dozen years of which I've spent at Fernbank Science Center in Atlanta, Georgia. I also teach woodworking classes, mostly at Highland Woodworking.
I write this blog to show what can be done with very basic tools in limited space. Even though woodworking is part of my day job, for my own personal projects I work in borrowed space: half of a two-car garage.
I also write occasional posts about why I'm a woodworker: the pleasures of working and the beauty of the material.
DISCLAIMER: I teach classes at Highland Woodworking, and I also produce occasional videos that are hosted on Highland's YouTube account. I link to products on their website as a professional courtesy. I do not get a sales commission from Highland, nor does this blog have "affiliate" status with them (or anyone else) to give me a little kickback if you buy what you click here. As of this writing (2019) I haven't ever received free or discounted tools, supplies, or services for purposes of reviewing or promoting them. Part of my pay from Highland includes store credit with them, but that credit is spent on supplies and tools for my personal use. I promise to change this statement to reflect any facts that might change!