Description
The Shear Lashing is a knot used to bind two spars or poles together, allowing them to pivot at the top. This configuration creates shear legs, which can be spread apart to form a stable structure for various uses. A single set of shear legs can be employed as a fulcrum for lifting or to provide mechanical advantage, such as in a lever system. Multiple sets of shear legs can be combined to form an aerial bridge or other large constructions.
Strength/Reliability
Wrapping and frapping the lashing tightly around the spars and finishing with a Clove Hitch, this lashing creates a strong, secure and flexible joint.
Note
The Shear Lashing begins with a Clove Hitch followed by turns and frapping and is closed with an additional Clove Hitch. As a rule of thumb, the width of the lashing should be at least the combined width of the two spars. Always tie at least two fraps when forming the lashing. Though not required, it is considered good form to tie the finishing Clove Hitch on the opposite spar from the initial Clove Hitch.
Related
Common Uses
- bind two poles together at one end to form an A-frame.
- build a simple crane or lever from poles (shear legs) and rope.
- construct a camp gateway or entrance from lashed poles.
- make a pair of hinged poles for a bridge or walkway support.
- build the pole supports and A-frames for a rope bridge or monkey bridge.
Found in
