Standard, your Frontier mills up to 11 feet (3.4m) long. To mill 18 feet (5.5m), add one 7’ (2.1m) extension. Or, add as many extensions as your want to mill logs of any length. Each extension bolts permanently to the end of the log deck.
If you have a trailer equipped sawmill, and you add this extension, you must also add the Subframe Section and Support Legs
Note: Maximum of one 7-foot (2.1m) extension recommended on the trailer-equipped model. Additional log rest/dog clamping assemblies sold separately.