John Wardle worked and reworked the Perpendicular and Parallel cross sectional drawing until completely developed before starting on plans and elevations. The tabletop with inset tiled surface and linear tray is a constant extrusion, everything in parallel, while its support structure of legs and interlocking beams are set perpendicular and parallel. The cross section is often the most informative architectural drawing, illustrating structure, surface and spatial character.
