Page 579 - Bob Holtzman "The Field Guide to Knots How to Identify, Tie, and Untie Over 80 Essential Knots for Outdoor Pursuits"

80. Sheer Lashing

This lashing is used when you need a shaft longer than your longest pole.

For light-duty use, such as an improvised fishing rod, a single Sheer Lashing
may suffice to splice the overlapped ends of two thin sapling poles
together. But for structural members like vertical supports on signal towers,
flag staffs, or ridge beams, the poles should have considerable overlap and
lashings at both ends.

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