<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"><base href="x-msg://55/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Rob:<div><br></div><div>There was a very good article in Arboriculture & Urban Forestry by Ken James on Biomechanics. The reference material reviewed and listed might be of assistance in your project. Here's a link to the full pdf of the article:</div><div><a href="https://www.researchgate.net/publication/286457330_Tree_Biomechanics_Literature_Review_Dynamics">https://www.researchgate.net/publication/286457330_Tree_Biomechanics_Literature_Review_Dynamics</a></div><div><br></div><div>In addition, another paper by Ken James entitled "A Dynamic Structural Aanalysis of Trees Subject to Wind Loading has a section on the Tree Pull Test</div><div><a href="https://minerva-access.unimelb.edu.au/bitstream/handle/11343/35741/265448_Ken%20James%20Thesis.pdf?sequence=1">https://minerva-access.unimelb.edu.au/bitstream/handle/11343/35741/265448_Ken%20James%20Thesis.pdf?sequence=1</a></div><div><br></div><div>Hope this helps</div><div><br></div><div>kind regards</div><div>naomi<br><div><div>On Apr 28, 2017, at 3:18 PM, "Reny, Robert via CANUFNET" <<a href="mailto:canufnet@list.web.net">canufnet@list.web.net</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div lang="EN-CA" link="blue" vlink="purple" style="font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div class="WordSection1" style="page: WordSection1; "><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-family: 'Arial Narrow', sans-serif; ">Hi All,<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-family: 'Arial Narrow', sans-serif; "> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-family: 'Arial Narrow', sans-serif; ">Does anyone have any data or guidelines for replicating a force on a tree when performing a hand pull test? As part of our advanced risk assessment techniques, we will perform a hand pull test on smaller trees to assess soil, root or trunk movement. We’re curious as to the amount of force necessary to adequately represent a wind speed of up to 80 km/h. Any information on this subject would be appreciated.<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-family: 'Arial Narrow', sans-serif; "> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-family: 'Arial Narrow', sans-serif; ">Thanks,<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-family: 'Arial Narrow', sans-serif; "> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 9pt; color: rgb(64, 64, 64); ">ROB RENY | COORDINATOR, URBAN FORESTRY<br><br><img width="200" height="73" id="Picture_x0020_1" alt="COS_Tag_pp_cmyk-200" apple-width="yes" apple-height="yes" src="cid:image001.png@01D2C013.96CC9FF0"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><b><span style="font-size: 6pt; color: rgb(118, 146, 60); "> </span></b></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><b><span style="font-size: 9pt; color: rgb(118, 146, 60); ">CITY OF SURREY<o:p></o:p></span></b></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 9pt; color: rgb(153, 153, 153); ">Parks, Recreation and Culture<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 9pt; color: rgb(153, 153, 153); ">6651 – 148 Street, Surrey, BC, Canada V3S 3C7<br>T 604.501.5090 | F 604.501.5177 <span class="Apple-converted-space"> </span></span><span style="color: rgb(31, 73, 125); "><a href="http://www.surrey.ca/" style="color: purple; text-decoration: underline; "><span style="font-size: 9pt; color: rgb(118, 146, 60); ">www.surrey.ca</span></a></span><span style="font-size: 9pt; 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font-size: 11pt; font-family: Calibri, sans-serif; "><b><span style="font-size: 9pt; color: rgb(118, 146, 60); ">Connect, Share and Engage with your City<o:p></o:p></span></b></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div></div></div></blockquote></div><br></div></body></html>