Log profile and log structure incorporating said log profile

A log for use in log construction, said log comprising:

• upper and lower, opposed major faces;
• a surface adapted to be an exterior, vertically extending surface in such a log construction;
• at least one groove and a complimentary tongue formed in the upper and lower major faces, respectively, for aligning a stack of plurality of such logs in a substantially vertical array;
• a flange comprising interior and exterior surfaces adapted to be substantially vertically oriented in such a log construction, said flange being connected to and depending downwardly from said lower major face, said flange being positioned so that said exterior surface of said flange constitutes an exterior surface in such a log construction;
• a channel surface positioned adjacent to the upper major face of the log, said channel surface being adapted to be oriented substantially vertically, in such a log construction, opposite and spaced substantially apart from the interior surface of a flange of a corresponding log stacked on top of the log and forming therewith a channel,
• wherein, when a plurality of such logs are stacked in a vertical array, a substantial portion of the weight of the logs near the top of such array is supported by logs at the bottom of such array.