Air Louvers VLFSG ThruBolt™ Vision Lites combine the heavy-duty construction of the VLF ThruBolt™ series with welded steel security grilles to provide additional protection for glazing in high-abuse or security-sensitive environments. Constructed with an 18 gauge steel frame and 12 gauge security grilles featuring square openings, this model maintains fire-rated performance while adding physical protection against impact or tampering. Designed for commercial hollow metal and wood doors, the VLFSG is suited for institutional, educational, and industrial facilities requiring both visibility and enhanced glazing protection.

Specifications
Application: Standard 1-3/4″” door thickness
Glazing thickness: 3/16″” – 1/4″”
Frame material: 18 gauge cold rolled steel
Security grille material: 12 gauge (.105″”) cold rolled steel
Grille opening size: 13/16″” square pattern
Grille configuration: Two grilles welded to interior frame faces
Standard finish: Mineral bronze powder coat
Fasteners: #8-32 flathead Phillips thru-bolts with blank head on one side
Minimum size: 4″” x 4″”
Maximum size: 48″” x 48″”
Door cutout: Order size (W × H)
Glazing size: Order size minus 1/4″”
Exposed glazing: Order size minus 1″”
Fire ratings: Up to 180 minutes depending on glazing size and listing
UL listings: ANSI/UL 10B, ANSI/UL 10C, CAN/ULC S104
Optional materials: Galvanneal steel, zinc-plated steel
Compatible fire-rated glazing: FireLite, Pyran Platinum F, Fireglass, WireShield
Compatible non-rated glazing: Tempered glass
Optional fasteners: Torx screws
PAK options: Vision lite, glazing, and glazing tape kits available
Application: Standard 1-3/4″” door thickness
Glazing thickness: 3/16″” – 1/4″”
Frame material: 18 gauge cold rolled steel
Security grille material: 12 gauge (.105″”) cold rolled steel
Grille opening size: 13/16″” square pattern
Grille configuration: Two grilles welded to interior frame faces
Standard finish: Mineral bronze powder coat
Fasteners: #8-32 flathead Phillips thru-bolts with blank head on one side
Minimum size: 4″” x 4″”
Maximum size: 48″” x 48″”
Door cutout: Order size (W × H)
Glazing size: Order size minus 1/4″”
Exposed glazing: Order size minus 1″”
Fire ratings: Up to 180 minutes depending on glazing size and listing
UL listings: ANSI/UL 10B, ANSI/UL 10C, CAN/ULC S104
Optional materials: Galvanneal steel, zinc-plated steel
Compatible fire-rated glazing: FireLite, Pyran Platinum F, Fireglass, WireShield
Compatible non-rated glazing: Tempered glass
Optional fasteners: Torx screws
PAK options: Vision lite, glazing, and glazing tape kits available

Downloads

Download Vision-Lite-VLFSG-Submittal.pdf