DoubleCAD™ XT PRO can automatically generate roofs or slabs from wall objects. It understands the wall definitions and shapes, including arc walls, and generates the right rooflines based on object property settings for overhangs, pitch, and more. They can be easily modified for different slopes on different faces as well.

Slabs such as concrete spandrels or others can be created in a variety of shapes and sizes. Holes can be added in different shapes and dimensions to accommodate columns, elevator shafts, or stair wells.

Stairs may be added and managed parametrically, whether straight, curved, spiral, u-shaped, multi-landing, or another configuration. Their properties can be managed to determine the specific riser height, width, number of steps, and easily define landing styles and turns.

Rails can be added to one or both sides of stairs with a click, and can even be placed without stair for balconies, or in a basic configuration for fences. Object properties that can be defined include rail locations, post locations, rail extensions, and styles may be created for those rails to be applied elsewhere.