Urethane Foam is structural and has structural properties. I used to test it for uniformity and structural properties for the foam panel building industries. Building insulation [especially the lighter density]foams are not dimensionally stable [they shrink] and are more effected by temperature over time and do not have the strength of urethane foam.
Urethane foam is structural when it is placed in a composite matrix. Take a foam plank and check it's bending strength, then glass each side and check it for bending strength. This will demonstrate the composite strength of the matrix. Combining the matrix with adhered foam layers and wood framing makes it stronger. Removing the foam destroys the composite strength. Ronald R. Eason Sr. President / CEO Ph: 816-468-4091 Fax: 816-468-5465 http://www.jrl-engineering.com Our Attitude Makes The Difference! -----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf Of Mark Langford Sent: Tuesday, April 25, 2006 5:09 PM To: KRnet Subject: Re: KR> Removing Foam after glassing? Robin Wills wrote: > My understanding is the foam is completely non-structural, and by > removing it, I could possibly save up to 20Lbs. I think you'll find that it's not "completely" non-structural. You can easily answer the question by laying up two layers of glass on plastic, and seeing how flimsy it is. You'll then know why you need the foam... Mark Langford, Huntsville, Alabama see KR2S project N56ML at http://home.hiwaay.net/~langford email to N56ML "at" hiwaay.net -------------------------------------------------------------- _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
