Abstract
Circumferential bands stretched around the stem, kerfs cut into the stem before cross-cutting, and circular grooves in new end faces of logs are evaluated as measures against heart checks. The success of the three measures greatly depends on the distance they are applied from the log end or from the stem axis and on the dimensions of the band, kerf, or groove. Most efficient distances and dimensions are computed in a Finite Element method. Bands appear to be most promising, though wide bands and huge stretching forces have to be applied for thick stems. Where intact cores of timbers are more important than peripheral zones, the cheaper kerfs and grooves appear to be more economical.
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