<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <TITLE>Message</TITLE> <META content="MSHTML 6.00.2800.1561" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><SPAN class=984591921-28032007><FONT face=Arial color=#0000ff size=2>Hi Terry, I approve of your caution and thank you for it. The webbing that I use is about as strong as metal for pull force. I'm going around my cauls about 3 times before I apply the clamps. Before the straps would break, I would expect the C-clamps to let the straps slip. But so far, nothing moves. But I am very carefull when I apply the pressure and I do so very slowly because the problem is that the cauls want to move around a bit.</FONT></SPAN></DIV> <DIV><SPAN class=984591921-28032007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV><SPAN class=984591921-28032007><FONT face=Arial color=#0000ff size=2>Marcel</FONT></SPAN></DIV> <BLOCKQUOTE dir=ltr style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px"> <DIV></DIV> <DIV class=OutlookMessageHeader lang=fr dir=ltr align=left><FONT face=Tahoma size=2>-----Message d'origine-----<BR><B>De :</B> pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] <B>De la part de</B> Farrell<BR><B>Envoyé :</B> 28 mars 2007 06:54<BR><B>À :</B> Pianotech List<BR><B>Objet :</B> Re: Poor man's soundboard press<BR><BR></FONT></DIV> <DIV><FONT face=Arial>Hi Marcel. I really meant to be serious with my comment. On a longer rib, let's say one inch wide (many are wider) by 36 inches long (some are longer), your rig is pushing your upper board upwards with 1800 lbs. of force - that's like your retaining system supporting an old VW bug with me inside it! It's really quite amazing how much force one can generate with a simple setup like this.</FONT></DIV> <DIV><FONT face=Arial></FONT> </DIV> <DIV><FONT face=Arial>I've had a couple slight mishaps with my presses with some pretty dramatic results - usually just more scary than dangerous - but I think that is perhaps because I overbuilt my presses.</FONT></DIV> <DIV><FONT face=Arial></FONT> </DIV> <DIV><FONT face=Arial>It appears that the upper caul is retained by one velcro strip at each end. If I am seeing that correctly, you might want to think about slipping some sort of steel safety device around there also - just in case......</FONT></DIV> <DIV><FONT face=Arial></FONT> </DIV> <DIV><FONT face=Arial size=2><FONT size=3>I enjoy your input to this list - I just don't want to hear about you having to have a caul-ectomy from your skull!</FONT> <FONT size=5> :-O</FONT></FONT></DIV> <DIV><FONT face=Arial></FONT> </DIV> <DIV><FONT face=Arial>Terry Farrell</FONT></DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV><SPAN class=281331218-27032007><FONT face=Arial color=#0000ff size=2>I never said it was safe did I. But I'm limiting the pressure to 50pds/sq.inch and it was fine.</FONT></SPAN></DIV> <DIV><SPAN class=281331218-27032007><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV><SPAN class=281331218-27032007><FONT face=Arial color=#0000ff size=2>Marcel</FONT></SPAN></DIV> <BLOCKQUOTE dir=ltr style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px"> <DIV></DIV> <DIV class=OutlookMessageHeader lang=fr dir=ltr align=left><FONT face=Tahoma size=2>-----Message d'origine-----<BR></FONT></DIV> <DIV><FONT face=Arial size=2>Aahhhhhhhhhh! Stand back!</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Keep your disability insurance paid up!</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Terry Farrell</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>