Model HDD
Heavy Duty Dock Door
![Model HDD](https://www.tnrdoors.com/media/zoo/images/Model-HDD_b073824f453602997e661fba4d852dc1.jpg)
Examples of Applications
Ideal for distribution, commercial, and manufacturing applications.
Door Information
- Reliable and consistent door operation and impact release performance. No guide gap maintenance required.
- Suitable for applications up to 10 feet wide and 12 feet high
- In-board spring assembly with 25,000 cycle rating
- Sleek profile with easy installation, reduced clearances, and minimal maintenance.
- Manual Chain Hoist, 4.5:1 – fast and easy operation.