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<DIV>Julian:</DIV>
<DIV>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.</DIV>
<DIV>Gerard </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=jadunster@gmail.com href="mailto:jadunster@gmail.com">Julian
Dunster</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=canufnet@list.web.net
href="mailto:canufnet@list.web.net">Canadian Urban Forest Network</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, February 12, 2008 12:17
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [CANUFNET] Safe wind speed
operating conditions</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>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.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>On Behalf of Dunster & Associates
Environmental Consultants Ltd.</FONT></DIV>
<DIV> </DIV><FONT face=Arial size=2>
<DIV><BR>Dr. Julian A. Dunster R.P.F., M.C.I.P., ISA Certified
Arborist<BR>ASCA Registered Consulting Arborist # 378<BR>PNWISA Certified Tree
Risk Assessor # 1</DIV>
<DIV> </DIV>
<DIV>My repy email is <A
href="mailto:jadunster@gmail.com">jadunster@gmail.com</A><BR></FONT></DIV></BLOCKQUOTE></BODY></HTML>