Bending windows.

[misterg]

Graham,

Bigmart has it right. You will be able to flex the glass to some extent, you will *not* be able to permanently deform it, so the ambient temperature is irrelevant (below about 500 deg C, anyway!)

What type of glass are you using?

Personally, I would only try this with *toughened* glass. Flexing ordinary (annealed) glass or laminated glass places the convex surface permanently under tension, and it could break at any time. Toughened glass is made so that the surfaces are in compression. Flexing it just reduces the compression in the convex surface a bit. It will withstand a frightening amount of abuse, *except* really deep, localised damage, or chips in the edges.

I assume you're replacing like with like? 8mm glass is over twice as stiff as 6mm and won't flex as far without breaking. Was the glass from the old windows flat, or curved? If curved, then it was *made* this way, and the replacement may have to be, too.

Would also endorse the advice to use neoprene tape, rather than mastic, and to take it g-e-n-t-l-y.

Andy (Glass Technologist of sorts)

 

[Ships_Cat]

Very informative post misterg, especially regarding the surface stress on toughened glass, and explains the following.

Ordinary glass or laminated glass should not be used for marine windows it should always be toughened (to a relevant standard, and should come back from the toughening with a standard logo in one corner) or else plastic used.

I have, in fact, never seen anything other than toughened glass or plastic go into new builds, but my experience is mostly with commercial and high quality vessels. Other materials are normally (always?) prohibited by construction Rules and Codes.

John

 

[Graham_Wright]

That's why I carry cover boards in preparation for such a calamity.