Portfolio During Realisation

English Version

Jack arch under construction, seen just before, and just after the key pieces are layed. The split vousoirs of the arch are layed up over a wooden support, arriving at the arch's centre where the cardboard template representing the key pieces should fit perfectly. Immediately the key is in place the wooden frame is removed and the key tapped - compressing the arch into place before the mortar has completely hardened. This means that the arch arches into place, rather than sets in place, as when the wooden support is not removed until the mortar has completely hardened.