Shear legs to the gin pole, derrick and tripod (lifting device). Shears are an A-frame of any kind of material such as timbers or metal, the feet resting on or in the ground or on a solid surface which will not let them move and the top held in place with guy-wires or guy ropes simply called "guys". Shear legs only need two guys whereas a gin pole needs at least three. The U. S. Army Field Manual FM 5-125 gives detailed instruction on how to rig shears. Fixed shear legs are most commonly found on floating cranes known as floating sheerlegs.
Stichaster striatus these were sessile organisms. It was not found to engage in cannibalism of its own species or to feed on other species of starfish. Many individuals were found to have missing or regenerating arms. This is likely the result of attacks by the dominant predatory starfish in the region "Meyenaster gelatinosus" and "Luidia magellanica". Starfish with missing arms are likely to have a certain minimum size; this is because, if they are too small, they are entirely devoured by the predator which attacked them. Juvenile "S. striatus" are found among the holdfasts of the kelp "Lessonia nigrescens" or hiding in