This may be of some use. In large pieces (over 40” rabbet on longest side – or so) or mirrors and plexi box pieces, the glazing/glass weight can become an issue.
Use the following formula to calculate the weight of the glazing:
Height X Width X Thickness X Density = Weight
The density of glass is .09 pounds per square inch. Plexi is .043
Typical thickness of float glass in decimal inches:
.080 picture
.090 single strength
.120 double strength
.190 “3/16” glass
.230 “1/4” glass
Example: weight of mirror with 1/4” 60 X 48” glass
60 X 48 X .230 X .09 = 59.6 pounds
Add the weight of the framing and that = one heavy mirror!
HTH, John
Use the following formula to calculate the weight of the glazing:
Height X Width X Thickness X Density = Weight
The density of glass is .09 pounds per square inch. Plexi is .043
Typical thickness of float glass in decimal inches:
.080 picture
.090 single strength
.120 double strength
.190 “3/16” glass
.230 “1/4” glass
Example: weight of mirror with 1/4” 60 X 48” glass
60 X 48 X .230 X .09 = 59.6 pounds
Add the weight of the framing and that = one heavy mirror!
HTH, John