LOG CONSTRUCTION

When evaluating the structural design of log construction, plans examiners have to assign an allowable strength for the logs. This means logs have to be graded by an approved grading agency (similar to grading of dimensional lumber) and basing structural calculations on the allowable strength for that specific species and grade of log. Grading stamps must remain visible on the logs until the framing inspection has verified those stamps for compliance with the approved plans.
Plans shall specify the species and grade of all logs and reference the agency which will be grading and stamping the logs. In addition, plans must specify both average (midpoint) and minimum (tip) log diameters so that required structural analyses may be performed.