The T300MR is our top-of-the-line insulated steel door—3” thick with a superior R-value of 25. It’s the strongest and most versatile section we offer, designed to stand up to the harshest environments while delivering excellent energy efficiency year-round.
With its clean, multi-rib face sheet, the T300MR not only performs at a high level—it looks great doing it. This door is a perfect fit for everything from heated shops and commercial buildings to high-end residential garages where insulation and strength matter.
We keep the T300MR in stock and can custom-engineer it to match your exact specifications. Whether you need a standard size or something custom, we can build it to fit—right down to 3″ height increments.
We also offer a wide selection of window options, both stock and custom, so you can get the look and light you want without compromising performance.
If you’re looking for maximum durability, energy savings, and flexibility in one package—the T300MR is it.
Panel Options
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- Multi-ribbed (in-stock)
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- Ribbed (special order)
Color Options
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- White (in-stock)
Window Options
Garage Door Openers
No matter what type of commercial door you have, we can provide you with the electric operator to ensure safe, efficient operation. Don’t see what you need here? Give us a call.
| Linear LC075 | NICE 1/2HP Trolley | NICE 3/4HP Trolley | NICE 1/2HP Hoist | NICE 3/4HP Hoist | |
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| Price | $$$ | $$$$ | $$$$+ | $$$$ | $$$$+ |
| operator Class | Light Commercial | Commerical / Industrial | Commerical / Industrial | Commerical / Industrial | Commerical / Industrial |
| Residential Use | Yes | No | No | No | No |
| Door Track Type | Standard | Standard | Standard | High or Vertical Lift | High or Vertical Lift |
| Duty Rating | 13 cycles/hour 50 cycles/day |
Continuous | Continuous | Continuous | Continuous |
| Horsepower | 3/4 | 1/2 | 3/4 | 1/2 | 3/4 |
| Brake | No | No | Yes | No | Yes |
| Door Speed | 9″ per second | 12″ per second | 12″ per second | Variable | Variable |
| Door Size | Up to 14ft high door, Door NTE 180sf |
Door NTE 320sf | Door NTE 450sf | Door NTE 305sf | Door NTE 450sf |
| Hand Transmitter | 1 included | Optional | Optional | Optional | Optional |
| Wiring | Standard electrical outlet | Hardwire 115V 1Ph | Hardwire 115V 1Ph | Hardwire 115V 1Ph | Hardwire 115V 1Ph |
| Sell Sheet | DOWNLOAD | Download | Download | Download | Download |
| Owner’s Guide | Download | Download | Download | Download | Download |
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