Commercial grade doors are appropriate for heavy use areas. Commercial doors over 12' come with a reduced drive chain hoist and can be equipped with an electric operator. Below is a chart comparing commercial grade drum doors to mini-drum doors. For more detailed information see the commercial drum door spec sheet or the mini-drum door spec sheet. Professional
installation Overstock
Doors
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| Commercial Drum Door | Mini-Drum Door | |
| Opening Method | Chain hoist* | Rope Pull-Up |
| Motorized Opener | Available | Not Available |
| Locking Method | Inside foot slider locks | Outside dual slide bolt lock |
| Hardware Kit | Heavy Duty | Standard |
| Available Sizes | 6' to18' | up to 10' |
*chain hoist included on doors 12' wide or 12' high, but can be added to any commercial grade door.