<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Dear Martin<div><br></div><div>Weights are for actual density and are tested normally on the field (so normally include 12-15% humidity), </div><div>in ETA (European Technical Approval) it is additionally defined that a strawbale has to fulfill the following quality-criterias:</div><div>maximum humidity: < 15 % of weight</div><div>additionally weed: < 0,5 %</div><div>rest corn: < 0,4 %</div><div><br></div><div>Bulk density according to European Norm EN 1602 lies between 95 kg/m3 and 120 kg/m3 (-10%, +15% of theoretical density)</div><div><br><div> <span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Verdana; 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-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>kind regards</div><div>Herbert Gruber</div><div>-----------------</div><div>asbn - austrian strawbale network</div><div>3720 Ravelsbach, Baierdorf 6</div><div>Tel. 02958-83640</div><div><a href="mailto:asbn@baubiologie.at">asbn@baubiologie.at</a></div><div><a href="http://www.baubiologie.at">www.baubiologie.at</a></div></div><div><br></div></div></span><br class="Apple-interchange-newline"> </div><br><div><div>Am 17.02.2013 um 20:30 schrieb martin hammer:</div><br class="Apple-interchange-newline"><blockquote type="cite"> <title>Re: [GSBN] Bale density</title> <div> <font face="Arial"><span style="font-size:10pt">Thanks very much Herbert. Are your numbers dry density (with the weight of moisture subtracted) or actual density (as weighed)?<br> <br> <br> On 2/17/13 9:55 AM, "asbn" <<a href="asbn@baubiologie.at">asbn@baubiologie.at</a>> wrote:<br> <br> </span></font><blockquote type="cite"><font face="Arial"><span style="font-size:10pt">I our old tests in Austria by Technical University of Vienna/GrAT the minimum weight for ideal thermal performance is 85kg/m3<br> Since 2008 we have a new buildings-strawbale, which was tested </span></font><span style="font-size:10pt"><font face="Verdana, Helvetica, Arial">ETA-10/0032 </font><font face="Arial">with a minimum weight of 95kg/m3<br> Germany starts with a minimum weight of 90kg/m3<br> <br> here are the links to our tests in Austria:<br> Wärmedämmleitwert-Überprüfung <<a href="http://www.baubiologie.at/download/zertifikate/lambda.html">http://www.baubiologie.at/download/zertifikate/lambda.html</a>> (first test 2002)<br> <a href="http://www.waldland.at/de/waldviertler_flachshaus/strohdaemmung/produktspezifikation/">http://www.waldland.at/de/waldviertler_flachshaus/strohdaemmung/produktspezifikation/</a><br> <br> tests in Germany by FASBA:<br> <a href="http://www.baubiologie.at/download/Pb-lambda1.pdf">http://www.baubiologie.at/download/Pb-lambda1.pdf</a><br> <br> I all the tests we used wheat-straw<br> <br> We use the certified (building)bales for non-loadbearing walls as well as for (a few) loadbearing walls<br> <br> <br> regards<br> Herbert Gruber<br> -----------------<br> asbn - austrian strawbale network<br> 3720 Ravelsbach, Baierdorf 6<br> Tel. 02958-83640<br> <a href="asbn@baubiologie.at">asbn@baubiologie.at</a><br> <a href="http://www.baubiologie.at">www.baubiologie.at</a> <<a href="http://www.baubiologie.at">http://www.baubiologie.at</a>> <br> <br> <br> <br> <br> Am 17.02.2013 um 18:00 schrieb martin hammer:<br> <br> </font></span><blockquote type="cite"><span style="font-size:10pt"><font face="Arial"> Bale density <br> </font></span><font face="Arial"><font size="2"><span style="font-size:9pt">Hello all,<br> <br> Anyone care to weigh in (pun intended) on the minimum bale density for straw bale walls?<br> <br> This is in the context of the most recent straw bale code proposal for the International Residential Code.<br> <br> Things to consider:<br> <br> <br> </span></font></font><ul><li><font face="Arial"><font size="2"><span style="font-size:9pt">I’m interested in the minimum acceptable density, not the optimum </span></font></font></li><li><font face="Arial"><font size="2"><span style="font-size:9pt">Densities from tested assemblies are especially useful (especially structural tests) (please mention the test if this is the case) </span></font></font></li><li><font face="Arial"><font size="2"><span style="font-size:9pt">Include type of straw with your number(s) if relevant </span></font></font></li><li><font face="Arial"><font size="2"><span style="font-size:9pt">Dry densities are preferred (bale weight / bale volume, minus % moisture content), but wet densities are ok if you also give the approximate moisture content. </span></font></font></li><li><font face="Arial"><font size="2"><span style="font-size:9pt">Lb/sq.ft. or kg/m3 are ok. </span></font></font></li><li><font face="Arial"><font size="2"><span style="font-size:9pt">Whether the minimum acceptable density should be different for structural (load-bearing or shear wall) and nonload-bearing applications </span></font></font></li><li><font face="Arial"><font size="2"><span style="font-size:9pt"> <br> </span></font></font></li></ul><font face="Arial"><font size="2"><span style="font-size:9pt"><br> (Note: I’m aware that cutting the bale ties before plastering is a practice some employ, at least for nonload-bearing walls.)<br> <br> Thanks!<br> <br> Martin Hammer<br> </span></font><span style="font-size:10pt"> <br> _______________________________________________<br> GSBN mailing list<br> <a href="GSBN@sustainablesources.com">GSBN@sustainablesources.com</a><br> <a href="http://sustainablesources.com/mailman/listinfo.cgi/GSBN">http://sustainablesources.com/mailman/listinfo.cgi/GSBN</a><br> </span></font></blockquote><font face="Arial"><span style="font-size:10pt"><br> <br> <hr align="CENTER" size="3" width="95%">_______________________________________________<br> GSBN mailing list<br> <a href="GSBN@sustainablesources.com">GSBN@sustainablesources.com</a><br> <a href="http://sustainablesources.com/mailman/listinfo.cgi/GSBN">http://sustainablesources.com/mailman/listinfo.cgi/GSBN</a><br> </span></font></blockquote> </div> _______________________________________________<br>GSBN mailing list<br><a href="mailto:GSBN@sustainablesources.com">GSBN@sustainablesources.com</a><br>http://sustainablesources.com/mailman/listinfo.cgi/GSBN<br></blockquote></div><br></div></body></html>