Hi Scott,
No worries, I knew when I saw it what you had done as I did the same thing to a student (which lead to some funny confusion about "rustic furniture.") The link does show my form of "spindle work" with "hinden" not exposed shoulders. This makes for a much stronger joint and a more "grown in place" look.
Hi Satamax,
I normally would not make an issue of such a small point, (please use whatever you would like my friend if it seems correct to you
) yet because we are sharing with those that may be less experienced I have to stress the errors in your comments about screws in this context, and agree with Scott 100%.
"Real screws," (or any other type)do not "hold fine," in the end grain application of wood (especially "green" live edged wood) where they are acting like a tenon. This is not true or appropriate "green wood" construction, and would not meet PE standards for dynamic momentum load in stair or porch railings. I have to really stress this, as a public forum, the use of screws in this application ARE NOT SAFE.
Now, if you take some of the "bolt assemblies" found in "
knockdown furniture," or the "
Timberlinx" bolt found in "post and beam" work, yes these can afford the strength and joint power needed in railings. (which by the way, are not a type of "screws" at all, as they interface with a nut and/or washer, yet both are on the principle of a "wedge or inclined plane" if you want to speak of the "physical dynamic.") They also take more time to cut, and cost more as you must "buy something" than traditional "mortise and tenon" work.
Your other comparisons are not germane to this subject as they are being applied to wood in the "cross grain" application, and are under more of a "shearing load" than any other modality. Some of your observations about "shearing strength" of a traditional wood tenon compared to a screw is simple false and the furthest thing from the truth about it. You are now getting into part of what I do for a living, and just returned from a roof job of a warehouse built around the turn of the century. I can not tell you how many times I have seen all manner of "ferrous metal hardware" fail in comparison to traditional joints, both in shear and in other dynamics. I have spent a large portion of the last 40 years in and around vintage timber frames and there ilk, restoring and taking them apart to do so. In this light I can speak with some authority that metal fasteners are seldom superior to wood joints and only came into primary use during the "industrial revolution" when "big industry" started the practice of hiring "unskilled labor" and needed a fast (not better) method for creating joints in wood assemblies from furniture to architecture. This is the reason we have the many different types we do, not there superiority. It is not until you get into very sophisticated and noncorroding alloys that you find "metal joints" that can compete with traditional wood joinery for longevity, strength and durability.
I would point out that you can also create tension in several traditional joints as well. I would further point out that "tension joints" relying on a screw
thread in the end grain of wood is a formula for disaster. I have never seen the legs of a stool attached with screws, except after the time of the "industrial revolution" and none last very long without major repair. So again, NO the old farts did not use screws when given a choice, the manufacture of stools did because of the labor force they indentured. We "old farts" knew better and only built properly with the correct methods. This "if they had it, they would have used it," modern excuse is not true in many applications and cultures. I have seen this reality time and again, among the Amish, and indigenous cultures around the globe when they flatly ignore or clearly chose traditional over modern methods, as seldom are these modern ways better...only "modern" and often less enduring.
You will have to share with all of us how much time you have behind "Veritas" tools (including the tenoning jig) as I know (and have met on several occasions) the owner of the company, and have spent about twenty years behind them. Most, (including the tenoning jig) are excellent at their given tasks. I would be keen (as would Leonard Lee the owner and principle designer) to read what you find wanting, or lacking about them, and could see improvement, as he (or his son Robin) are extremely open to feedback from Artisans and Craftspeople that actually use their tools extensively. I don't mean to sound condescending but your comments thus far seem parochial at best, and lack "green woodworking" experience. I do not typically use a tenoning jig on dry wood, often rewetting a section of dry wood just to get better shear cutting action. "Morse tapers" (after Stephen A. Morse) are for tapers in machining metal and not wood predominantly though after 1860 the similarities do exist. So once again your information is a little out of context and needs refinement. Both "straight and tapered" tenons have there place in both "green" and dry woodworking methods, yet neither modality uses screws or other metal fasteners to secure them relying instead on friction, compression, wedge expansion, adhesive and/or pegs and wedges to create a drawing or holding effect. I would also point out that cutting a tenon by hand is not as challenging as you would lead the readers here to believe. A screw belongs where it belongs and I like screwing in those spots...not acting like a tenon in wood which is not where I do my screwing...
(sorry for the side track folks...
)