Portico, corner loggia and the centering of a vault
A columned portico with benches, a loggia carried around a court, and a vault's framing
Three architectural studies fill the sheet. A columned portico with benches and a backrest is drawn in elevation, with a note that here the windows should be cut into the walls. Below, a corner loggia shows how to carry the same order of columns around a court where only one or two of the four sides have a full portico, closing the arches with an architrave that drops to the column bases and setting the windows within, so that the main beams of the halls fall between one window and the next. At the foot is the framing (centering) of a vault, a domed lattice of ribs on which the vault would be turned.
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Portico between columns with benches
A portico set between columns is drawn with a backrest (spalliera) and benches. The note directs that here the windows are to be cut into the walls.
Corner loggia around a courtyard
Where you do not want a full portico on all four sides of a court, the same order of columns is still carried around the other faces, the arches closed with an architrave that descends to the column bases, and windows set within these architraves. The main beams of the halls are then laid so as to fall between one window and the next.
Centering (framing) of a vault
At the foot is drawn the armature of a vault — the timber framing, or centering, on which a vault would be built. It appears as a domed lattice of crossing ribs.