Today I would like to say a little about joinery and design. Like I mentioned in an earlier post, most of the old time stand by furniture types are of a design that is inherently of good structural design, and some lend themselves more to longevity than others. One reason I like the Arts and Crafts mindset for design, is the sturdiness and massiveness of the pieces. The through mortise and tenon joinery is the strongest joint used in furniture building. Even when the design moves away from the Arts and Crafts style, the mortise and tenon is still used, although not in the through design. The old time furniture was also pegged with a dowel or wooden nail, not only to hold the joint together, but to actually to pull the joint together, as in a draw bore application. This joint is also used in timber framed barns and houses, to hold together the massive timbers used. This joint is also used with wedges, to expand the tenon and hold it firmly in the mortise. This joint used with today’s space age glues is practically indestructible. Normally, the wood will fail before the glue does. I like to design furniture with joinery that is structurally sound, before any glue is added.
The photo shows a section of our 8 leg desk. The legs have the mortises cut and the rail pieces have been tenoned are ready to assemble.
Much of the mass produced furniture, even from the turn of the 20th century, used a doweled joint, which has the appearance of a mortise and tenon joint. This joint has the pieces made to butt together, but the pieces are joined with dowels, rather than with a nice strong tenon. This joint has very little structural strength and will fail with only a small amount of stress placed on it. The “knock down” joint used on today’s furniture, is a close relative to the doweled joint. The main difference is the joint’s ability to be tightened up. Strength wise, it’s not any stronger than the doweled joint.
Quality furniture will also utilize dovetail joints. I always use them for drawer construction. Sliding dovetails are also used for applications such as chair arms and bookcase shelves, to ensure that the parts stay together, without the use of hardware.
On our table, desk, and recliner legs, I use a method of construction called “Quadralinear” leg construction. I’ve researched this term, along with a woodworking history buff that I know, and we’ve decided that this term is one that was used exclusively by the Stickley brothers, in describing their method of leg construction for their furniture. This method permits the figure of the oak to “wrap” around the legs. Normally oak only has figure or flake on two sides of the board. Originally, several methods were used to achieve this look. Some worked very well, some not so well. One technique was to face glued two quarter-sawn board together and used quarter-sawn veneer on the flat sawn face to get the desired affect. This looked fine, but the veneer had a tendency to crack over time, due the the shrinking and expanding of the flat sawn faces. I use the method of cutting 45 degree angles on the four side pieces of the leg and glue them around a core piece that is made of a stable material that won’t cause expansion problems. The photo shows the process use.
On the right are the machined pieces of the leg, ready for the glue and core. On the left are the completed “sushi roll” legs, ready for trimming and cutting the mortises.
In the next segment, I hope to get into the finishes I use, and give a brief explanation of the different types used on today’s furniture.


