Fireglass® 20 1/4″ 20 Min. Fire-Rated Safety Glass (FGL)
TGP Fireglass® 20 is a 1/4″ thick fire-protective tempered safety glass designed for commercial door vision lites, borrowed lites, sidelites, and transoms, providing impact safety compliance and 20-minute fire protection.
- 1/4″ (6mm) tempered safety glass construction
- 20-minute fire rating
- Impact safety rated (CPSC Category I & II)
- Approximately 89% visible light transmission
- Designed for vision lites, sidelites, transoms, and borrowed lites
Product ID: TGP-FGL
FREE delivery to most businesses and jobsites on qualifying orders.
Most orders ship within 3-5 business days. Get a quote now.
HOW TO ORDER
- Get a written quote from a USA Fire Door Solutions Specialist
- Approve & we ship your order
- Click the button below or call us to get started. You can upload plans, photos or files if you have them.
Product Details
TGP Fireglass® 20 fire-protective glazing is a tempered safety glass designed for commercial hollow metal doors and commercial wood doors requiring 20-minute fire-rated glazing. This fire-protective glass is designed to resist the passage of flames, smoke, and toxic gases but does not provide a barrier to radiant heat transfer. Suitable for vision lites, borrowed lites, sidelites, and transoms, this glazing is commonly specified for commercial, institutional, healthcare, and industrial applications requiring economical fire door glazing solutions.
Specifications
- Material: Fire-protective tempered alkaline safety glass
- Thickness: 1/4″ (6mm)
- Weight: 3 psf
- Visible light transmission: Approximately 89%
- STC rating: 31
- Minimum size: 4-1/2″ (minimum diagonal 12″)
- Maximum size: 36″ × 89″
- Fire ratings: 20 minutes (size and application dependent)
- Fire classification: Fire-protective glazing
- Listings: UL 9, UL 10B, UL 10C, NFPA 80, NFPA 252
- Impact safety: CPSC 16CFR 1201 Category I & II
- ANSI standard: ANSI Z97.1 impact safety compliant
- Applications: Vision lites, borrowed lites, sidelites, and transoms
- Finish options: Clear and frosted
- Glazing requirements: Standard glazing tape applied to both sides
- Marking: Permanent glazing identification marking required
- Warranty: None
- Fire-protective glass resists flames, smoke, and toxic gases
- This product is not a barrier against radiant heat
Downloads
fireglass-20-fact-sheet.pdf
Lock Prep Options
161 Lock Prep / Deadbolt Prep
Bored – 2-3/4″ Backset (ANSI / SDI A115.2)
86 Edge Prep
Mortise Lock Edge Prep w/ Blank Face (ANSI / SDI A115.1)
RPD – Rim Panic Reinforced
(Blank Edge & Blank Face) Designed for use with panic bar exit devices.
Custom Lock Prep
(Template Required)
Configurations
Single Door
Double Door Active/Inactive
Secondary Door Can Open When Flush Bolts Are Disengaged
Double Exit Door
Both Doors Active w/ SVR Panic
Double Door Push/Pull
Both Doors Active
(Cannot Be Fire Rated)
Communicating Door
For Adjoining Hotel Rooms
Double Egress Door
For Emergency Exit In Either Direction
Double Acting Door
Swings Both Directions (Cannot Be Fire Rated)
Core Construction
Polystyrene – Provides improved thermal performance and rigidity
Thermal Performance
| U-Factor Range (Calculated) ASTM C518 | 0.13 to 0.16 |
| U-Factor Range (Operable) ASTM C1363 | 0.35 to 0.41 |
| R-Value Range (Calculated) ASTM C518 | 6.40 to 7.61 |
| R-Value Range (Operable) ASTM C1363 | 2.40 to 2.80 |
Disclaimer: Thermal performance data is based on industry standard construction methods and testing. Actual thermal performance may vary based on installation methods. The addition of weatherstrip, vision lites, glass, louvers and hardware products will affect thermal performance. Even though polystyrene offers greater thermal performance compared to other core options this product is not Energy Star qualified.
Standard Sizes
7’0” / 84” Door Heights (1-3/4” Thick)
| Nominal Size | Inches | Actual Size (Net) |
| 2’0” x 6’8” | 24” x 80” | 23-3/4” x 79-1/8” |
| 2’4” x 6’8” | 28” x 80” | 27-3/4” x 79-1/8” |
| 2’6” x 6’8” | 30” x 80” | 29-3/4” x 79-1/8” |
| 2’8” x 80” | 32” x 80” | 31-3/4” x 79-1/8” |
| 2’10” x 6’8” | 34” x 80” | 33-3/4” x 79-1/8” |
| 3’0” x 6’8” | 36” x 80” | 35-3/4” x 79-1/8” |
| 3’4” x 6’8” | 40” x 80” | 39-3/4” x 79-1/8” |
| 3’6” x 6’8” | 42” x 80” | 41-3/4” x 79-1/8” |
| 4’0” x 6’8” | 48” x 80” | 47-3/4” x 79-1/8” |
7’0” / 84” Door Heights (1-3/4” Thick)
| Nominal Size | Inches | Actual Size (Net) |
| 2’0” x 7’0″ | 24” x 84” | 23-3/4” x 83-1/8” |
| 2’4” x 7’0″ | 28” x 84” | 27-3/4” x 83-1/8” |
| 2’6” x 7’0″ | 30” x 84” | 29-3/4” x 83-1/8” |
| 2’8” x 7’0″ | 32” x 84” | 31-3/4” x 83-1/8” |
| 2’10” x 7’0″ | 34” x 84” | 33-3/4” x 83-1/8” |
| 3’0” x 7’0″ | 36” x 84” | 35-3/4” x 83-1/8” |
| 3’4” x 7’0″ | 40” x 84” | 39-3/4” x 83-1/8” |
| 3’6” x 7’0″ | 42” x 84” | 41-3/4” x 83-1/8” |
| 4’0” x 7’0″ | 48” x 84” | 47-3/4” x 83-1/8” |
8’0” / 96” Door Heights (1-3/4” Thick)
| Nominal Size | Inches | Actual Size (Net) |
| 2’0” x 8’0″ | 24” x 96” | 23-3/4” x 95-1/8” |
| 2’4” x 8’0″ | 28” x 96” | 27-3/4” x 95-1/8” |
| 2’6” x 8’0″ | 30” x 96” | 29-3/4” x 95-1/8” |
| 2’8” x 8’0″ | 32” x 96” | 31-3/4” x 95-1/8” |
| 2’10” x 8’0″ | 34” x 96” | 33-3/4” x 95-1/8” |
| 3’0” x 8’0″ | 36” x 96” | 35-3/4” x 95-1/8” |
| 3’4” x 8’0″ | 40” x 96” | 39-3/4” x 95-1/8” |
| 3’6” x 8’0″ | 42” x 96” | 41-3/4” x 95-1/8” |
| 4’0” x 8’0″ | 48” x 96” | 47-3/4” x 95-1/8” |
How to ORDER
Tell us what you need and we'll do the work for you! Most projects are quoted within 24 hours.
01
Step 1
TELL US WHAT YOU NEED
Share any projects details you have. Or just send us a message and we'll have someone reach out to you.
02
Step 2
GET A WRITTEN QUOTE
Your dedicated account manager will send you a quote or contact you with any questions.
03
Step 3
APPROVE & WE SHIP
We'll work with you thoroughout the entire process and carefully track your order until it's received.
Ready to start your commercial door project?
Priority pricing and fast lead times - free delivery to most jobsites and businesses nationwide.
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