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Can you provide any historical reference material – or direction to same – on the failure of black locust wood insulator pins used on utility pole cross arms until – Im told – the 50s…?

April 26, 2017Black direction failure Historical Locust material Reference wood

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Can you provide any historical reference material – or direction to same – on the failure of black locust wood insulator pins used on utility pole cross arms until – Im told – the 50s…?

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Answer Thanks for your question — I’m not so sure about data on the failure of Black Locust pins, but I can provide these references to that wood and pins: http://reference.insulators.info/publications/view/?id=10052 http://reference.insulators.info/publications/view/?id=10124 The second article reviews pin testing where black locust appears to have done very well, it does mention the failure mechanisms seen. Below are some articles on pins for high tension: http://reference.insulators.info/publications/view/?id=9363 http://reference.insulators.info/publications/view/?id=10272 I’m a little curious as to what you are investigating — hopefully this information is helpful.