Your question confuses me regarding horiz. and vert. The grain must run with the length of the spar. If you are to laminate a spar with 3/4" material, you must (should) start with 3/4" thick x 7.25 (depth of spar)x length of spar. Ergo, if you spar is 2.25 thk x 7.25 deep you will laminate 3 pieces that are 3/4" thick x 7.25"wide. DO NOT laminate a stack of 3/4" x 2.25" stock (about 10 pieces) to make the spar. While 10 laminations could/would work, it is wasteful, too much labor, too much glue, more prone to delaminate and will not hold bolts as well. They are several planes built with laminated spar. I recently did a Cassutt with a laminated spar. Built it slightly over sized and dressed it down to exactness on the planer. Pat in Vermont
-----Original Message----- From: Tony King Sent: Thursday, May 24, 2012 11:05 PM To: KRnet Subject: KR> Laminating spars I'm about to start laminating the timber to form my centre section spars from pieces that are 19mm (3/4") thick. Is the orientation of the laminations significant? I'm not sure why but all the laminated timber beams I've seen have the lamination layer horizontal. I can do this but in this case I'd waste less wood if the laminations were vertical. Does it matter? Cheers, Tony King _______________________________________ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to [email protected] please see other KRnet info at http://www.krnet.org/info.html
