Timber-framing joinery

摘要

The scarf joint was born of necessity when carpenters needed longer timbers than their forests could provide. The first documented example comes from the remains of a 7th-century Anglo-Saxon burial ship that was discovered in an English riverbank. A scarf was used to join stem and stern timbers to a center keel.rnDozens of scarf joints have been documented over time. Some have failed miserably, while others have survived centuries. The double-bladed scarf, first introduced in the 16th century, is the strongest joint for joining two timbers. Commonly used in a horizontal application (over a post, for instance), it also can be used vertically.