[CANUFNET] Safe wind speed operating conditions

[For Trees Company Ltd.]

Julian:
In the states, 30 mph is the limit for cranes. Here, I've seen several different manufacturer's sets of safety operational limits, and they vary. I can tell you from working in Lethbridge, Alberta, contract street tree pruning, that most often gusts to 75kph make treework very difficult, and 90 kph or more, darn near impossible.
Gerard 
  ----- Original Message ----- 
  From: Julian Dunster 
  To: Canadian Urban Forest Network 
  Sent: Tuesday, February 12, 2008 12:17 PM
  Subject: [CANUFNET] Safe wind speed operating conditions


  I am looking for information about safe working conditions in strong winds. In particular, policies that specify a wind speed above which all work must be stopped for safety reasons. The information might apply to tower cranes, work in forests, skyscraper construction etc.

  Thanks

  On Behalf of Dunster & Associates Environmental Consultants Ltd.


  Dr. Julian A. Dunster R.P.F., M.C.I.P., ISA Certified Arborist
  ASCA Registered Consulting Arborist # 378
  PNWISA Certified Tree Risk Assessor # 1

  My repy email is jadunster at gmail.com
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