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| Le chorobate | La groma | La dioptra |
When the Romans prepared a building site, they used chorobates to measure level differences and a groma or a dioptra for alignments.
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| Le chorobate | La groma | La dioptra |
The "goat" |
The "sheep" |
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The 'goat' was used to lift heavy loads. For the heaviest ones the energy was provided by slaves who walked inside a wheel that pulled up a rope to which the load was tied. |
The 'sheep' was used to drive posts in. It was made up of beams which carried a pulley with a rope. A load hung to the rope. Two men would pull it and then let go. The load fell and drove the post into the ground. |