Use of round mortise and tenon joints in light timber frame construction
Abstract
Rectangular mortise and tenon joints have been widely used in barns and other building constructions in this country and other countries for centuries. Round mortise and tenon joints differ from these essentially only in the geometry of the joints, but information is lacking concerning their use in building frame construction. The primary objective of this study was to investigate the use of round mortise and tenon joints in light timber frame construction and to demonstrate potential applications. In order to achieve desired objectives, a low cost tenon cutting machine with steel pipe framework was developed to produce different size and diameter tenons. A simple piece of equipment was also built to trim excess material away from the seats of the tenons. Included with the study were design, development, and testing of mortise and tenon joints, development of a modular construction prototype building frame and, finally an evaluation of the performance characteristics of a small light timber frame constructed with squared timbers and round mortise and tenon joints. Results of the study showed that round mortise and tenon joint construction provides a simple straightforward method of constructing building frames. Erection techniques are simple and only basic tools are needed. Furthermore, standard parts can be manufactured locally by cottage level industry or regionally by major producers. In conclusion, round mortise and tenon joinery provides a means of utilizing waste wood and small diameter material in the construction of useful building frames. Some of the these building frames might be used to satisfy the simple needs for backyard storage sheds in developed countries while others might be used to provide the basic framework for shelters, small farm buildings, and light industrial buildings in developing countries.
Degree
Ph.D.
Advisors
Eckelman, Purdue University.
Subject Area
Wood|Technology
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