Hi Dwight, By "fixed", I mean they "don't open". I also agree that the newer frameless windows aren't better than framed, and I don't think I implied that they add strength to what could have been a solid fiberglass coach roof. I just think the coachroof is stronger with the windows intact, like a car's structure is stronger with the doors closed. Windows with cracks (especially frameless type) weaken the coachroof structure slightly. And will allow more flexing and more cracks will develop over time.
Chuck Resolute 1990 C&C 34R Broad Creek, Magothy River, Md ----- Original Message ----- From: "dwight" <dwight...@gmail.com> To: "Chuck S" <cscheaf...@comcast.net>, cnc-list@cnc-list.com Sent: Sunday, February 15, 2015 10:00:35 AM Subject: Re: Stus-List Windows and floorboards add strength Chuck, What do you mean by "fixed windows?" Aren't all good ports (windows) fixed to the coachouse, glued on, bolted on or other? I think maybe the ports that were glued on with Plexus and found on the 80's C&C designs were done that way mostly for appearance and not necesarily to add strength...I am skeptical about whether or not they added anymore strength than the framed ports did on the older (70's) designed boats. Dwight Veinot C&C 35 MKII, Alianna Head of St. Margaret's Bay, NS d.ve...@bellaliant.net On Sat, Feb 14, 2015 at 1:23 AM, Chuck S via CnC-List < cnc-list@cnc-list.com > wrote: I'm not an engineer but I do re-engineer many systems they dream up. I think the fixed windows do add strength and without them the structure has to be weaker. They help support the coachroof which does create an arch between the flatter deck sections. Also, floorboards. You might stiffen up an old design by changing from wooden plywood to an aluminum honeycomb sandwich. But would the cost be worth it? Probably not unless you needed to replace them.
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