Itemque, quae pilatim aguntur aedificia et cuneorum divisionibus coagmentis ad centrum respondentibus fornices concluduntur, extremae pilae in his latiores spatio sunt faciundae, uti vires eae habentes resistere possint, cum cunei ab oneribus parietum pressi per coagmenta ad centrum se prementes extruderent incumbas.
Moreover, when buildings rest upon piers, and arches are constructed with voussoirs and with joints directed to a centre, the end piers in the buildings are to be set out of greater width, so that they may be stronger and resist when the voussoirs, being pressed down by the weight of the walling owing to the jointing, thrust towards the centre and push out the imposts.
final_alignments\Vitruvius_Architecture_Book_6.json