Vision (Lightweight) Panel Specifications
U.L. Class
Thickness (inches)
Weight per square foot
of surface
Inside span without
additional support*
Class M
3.500
19 lbs.
16 ft.
Class 1
5.500
25 lbs.
21 ft.
Class 2
10.500
44 lbs.
29 ft.
Class 3
12.000
75 lbs.
36 ft.