Overhanging Plates: An Answer?

While browsing The Architecture of Migration (for about the seven-hundredth time), I encountered the following description concerning cabin construction, from Joseph Doddridge's Notes on the Settlement and Indian Wars, of the Western Parts of Virginia and Pennsylvania from 1763 to 1783:

At the square, two end logs projected a foot or eighteen inches beyond the wall to receive the butting poles, as they were called, against which the ends of the first row of clap boards were placed . . .

In configuration, the "butting poles" of cabins seem remarkably similar to the overhanging plates exclusive to hewed log buildings. It seems quite possible that, following the transition from round to hewed log construction, settlers retained "butting poles" in altered form. Perhaps the overhanging plate is simply a relic!