Concept and design
Choosing a Space-Saving Staircase Design - What is Legal and What Isn't?
...space-saving designs come in. They are especially popular for secondary access to a loft, an attic, or a basement. We will cover three of the most popular types: spiral stairs, alternating tread stairs, and retractable attic ladders.
Spiral staircases: the ultimate space-saver
Spiral stairs are a classic space-saving ...
