What's it weigh? Kinda hard to figure out necessary structure strength without a number. Each size 6mm through 20mm. Just a square foot number would be great I can do the math.
That calculator looks right. I believe the math equation for standard plate glass is the following: Weight is equal to 1.7 x number of 1/8th thickness x Sq Ft. So if you have a 3x8 ft window that was 5/8 th's thick its 1.7x5x24 = 204 lbs.