Several commercial instruments currently are sold for the purpose of determining the strength of timber [1]. This information is needed because of the reliance of several sectors of our infrastructure on this material. The most notable uses of large timber members are in telephone poles and bridges used on railroads. In many of these applications the strength of the timber is critical to the safety and reliability of the utilities and railroads. While the use of wood treatments has extends the useful life of timber, decay remains the primary mechanism of timber bridge deterioration [2]. Decay is defined as a process which adversely alters wood properties and can be attributed to two primary causes, biotic (living) agents and physical (non-living) agents. The mechanisms of decay are complex, however those factors which are of interest in the current effort affect the strength of the wood and thus impact the integrity of the structure.