Central-plan church plans, composite beams, and an assault bridge
Two church ground-plans, an interlocking-beam structure, and a bridge pushed to fortress walls
The upper sheet carries two ground-plans of centrally-planned churches: at the left a square set on the diagonal with radiating chapels, at the right a lighter polygonal scheme. Below, a boxlike structure drawn in perspective shows a roof built of short interlocking (composite) beams. At the foot a hinged bridge is shown being pushed against a fortress wall, and a note explains that the bridge is driven to the walls at a whistle-blast by a crowd of men.
On this page
Two ground-plans of centrally-planned churches
The top of the sheet sets out two plans for churches of central plan. The left plan is a square placed on the diagonal, ringed by rounded and squared chapels around a central space; the right plan is a lighter polygonal scheme with projecting bays. Both explore how chapels cluster symmetrically around a domed core.
Structure roofed with short interlocking beams
A boxlike frame drawn in perspective in the middle of the page is roofed by short timbers that lock into one another in a zig-zag pattern. The drawing studies how a span can be closed with composite beams shorter than the opening they cover. A smaller sketch of the same idea appears to its right.
Bridge for storming a fortress wall
At the foot of the sheet a hinged assault bridge is shown thrown up against a fortified wall. The accompanying note says the bridge is driven to the walls at the sound of a whistle by a large body of men, coordinating the rush of the attackers.