Occupation, wage, and industry data, over time, for Vassar, MI collected from the American Community Survey. In 2015, the median household income for Vassar, MI was $38,029, but the average maleâs salary was $11,855 more than the average femaleâs salary. White is the most
Glass weighs 162 pounds per cubic foot. 1 thick glass weighs 1/12 of that or 13.5 lb/ft2 1/4 thick glass = .25 x 13.5 = 3.375 lb/ft2 3/8 thick glass = .375 x 13.5 = 5.063 lb/ft2 1/2 thick glass = .5 x 13.5 = 6.75 lb/ft2.
Cooled rapidly, glass tempers. Slower cooling produces heat-strengthened glass. 4. Tempered is stronger. Tempered glass has a minimum surface compression of 10,000 pounds-per-square-inch (psi) and minimum edge compression of 9,700 psi, according to ASTM C1048. That makes it about four times stronger than annealed glass. Heat-strengthened glass has surface compression of 3,500 to 7,500 psi, about twice as strong as annealed glass, with no edge compression standard. 5. Tempered glass is safety glass.