Patent ID: 6070376
Filing Date: 2000-06-06
Classification: E04B

Abstract:
A wooden log wall including a lower log having a first outer curved side and an upper connecting portion, an upper log positioned on and extending along the length of the lower log, said upper log having a first outer curved side above the first outer curved side of the lower log and a lower connecting portion, said outer sides joining at a nip between the logs, said upper connecting portion including a tongue and said lower connecting portion including a groove, said tongue and groove located inwardly from and above the nip, said tongue being narrower than the groove and extending loosely into the groove, and a flush, load supporting interface between the logs defined by a downwardly facing and cylindrical load supporting surface on the upper log extending along the length of the upper log and inwardly from the nip to the groove and an upwardly facing and cylindrical load supporting surface on the lower log extending along the length of the lower log and inwardly from the nip to the tongue, the upwardly facing surface conforming to the downwardly facing surface, said surfaces engaging each other in flush contact outwardly and downwardly from the tongue and groove to the nip and along the length of the logs whereby the logs may rotate with respect to each other along the cylindrical load supporting interface.