Design Solutions - Winter 2014 - (Page 48)

The illustrations show two types of this historical joint. The is the hole or slot. The is the tongue or blade which fits into the slot. The stops the mortise before it goes all the way though the wood, while adding a bit of stability, mechanical locating, and greater glue surface area. The is often called a . In this version both the mortise and tenon are cut the full width and depth of the two wood parts. So, you may ask, why go through all the trouble? Can't we just push the two parts together with some glue between them? We could, of course, but the result would be a rather weak joint. In addition to strength, a being joined and hold them in position until the adhesive dries. This reduces the fabrication time, and speeds the final sanding steps. Variations of traditional mortise and tenon joints are often the ideal solution. When minimal disruption is likely to be applied to the joint while in use, and the design aesthetic will permit them, simple lap joints and full bridle or slot mortise joints will often speed fabrication. Glued Butt Joint From a design professional's viewpoint it's all about appearance. If a fine, unbroken line at the joint is part of the design aesthetic, then a sloping haunch or a hidden tenon will be specified. Bridle Joint Haunched Mortise and Tenon Slot Mortise and Tenon Edge Glued We can create a strong, lasting joint when we glue boards together . Gluing at right angles (end grain to edge grain) is weak because the end grain absorbs a good deal of the adhesive, and the surface area of the glue joint is small in relation to the pressure, torque, or tension usually applied to the assembly in normal use. I Lap Joint The main reason for the haunch mortise is usually . When a hidden or small loose tenon is used, the joint is not as strong. As much as one third of the joint is free floating, with only a minimal amount of glue on it, if any. When attaching to milled, solid wood legs, the tenons are often mitered at the end because they meet or nearly meet inside the mortises. There are other times when the mortise and tenon are a distinct design feature. Craftsman style furniture can use a through-mortise with a wedge or peg to hold it in place. We see this style in bookcases, trestle tables, and other case goods. A well machined set of joints like these will permit the for ease of moving, packing, and reassembling in its new home with minimum fuss and bother. Table Apron

Table of Contents for the Digital Edition of Design Solutions - Winter 2014

Design Solutions - Winter 2014
Contents
Cornerstone
High Note Hotel
Finding The Way
Schooled Design
Miles OF Hospitality
These Old Joints
Product Showcase
AWI Manufacturing Members
Ad Index
AWI Supplier Members

Design Solutions - Winter 2014