scarf joint

noun

a joint in which two timbers or other structural members are fitted together with long end laps of various forms and held in place with bolts, straps, keys, fishplates, etc., to resist tension or compression.
(in welding) a butt joint between two pieces beveled on their meeting surfaces.

Origin of scarf joint

First recorded in 1785–95

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

It might also come under the heading of scarf joint, although rarely used in actual practice as such.
Woodwork Joints | William Fairham
Fig. 219 is a tabled scarf joint which admirably resists tension and compression.
Woodwork Joints | William Fairham
Fig. 220 is an example of a lapped scarf joint which is secured with nuts and bolts.
Woodwork Joints | William Fairham
When the four pieces are put together a scarf joint is made near each corner, having an inch and one-half lap.
Scientific American Supplement, No. 365, December 30, 1882 | Various
Splice or scarf joint; used in framing, occasionally; of little value to boys.
Carpentry and Woodwork | Edwin W. Foster

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