Sheerlegs as an archaeological aid
Australian Archaeological Association
The name sheerlegs is given to a tripod used as a mechanical aid that has its apex tied together with a sheerlashing. As such, sheerlegs may have many uses, for example to suspend a block and tackle or to support various objects - the crown or apex being very stable and the leg arrangement being flexible so as to easily provide different heights.
Cane, S. & Cane, E. 1979. Sheerlegs as an archaeological aid. 'Australian Archaeology', no.9, 42-44.