by Peter Entringer & Théo Sanchez

Before starting building

When the Romans prepared a building site, they used chorobates to measure level differences and a groma or a dioptra for alignments.

Le chorobate La groma La dioptra

On the building site

The "goat"

The "sheep"

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.