Tree root failures

This study was conducted to develop methods of predicting which trees will fail at relatively low wind velocities, so that remedial action can be taken before tree failure. [UMN]

"Tree failures occur when a stressing force such as the wind pushes against the leaves, branches, and trunk of a tree (sail effect) and there is a weakness in the tree or soil. When winds exceed 50 or 60 mph, the weakness can be relatively minor yet the tree will fail. For lower-velocity wind or simple gravity to cause failure, the structural weakness must be more extensive. This study was conducted to develop methods of predicting which trees will fail at relatively low wind velocities, so that remedial action can be taken before tree failure." [Abstract]

[San Francisco, Mar. 5-6, 1998]

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