tested to ASTM F 1592 (2001) & UL 752 (1995).
ASTM F 1592 (2001) - meets Table 1 Grade 1 requirements.
UL 752 (1995) - meets Level 3 requirements.
*Minimum clearview between structural members 12" x 12" for UL 752.
*Minimum clearview between structural members 25-1/8" x 25-1/8" for ASTM F 1592.
*Glazing must be listed for sizes and dimensions.