Treehugger used to do a "Stair of the Week" feature, promoting stairs as a healthy, low energy way of moving between floors. Often they would be gorgeous cantilevered stairs that cost a fortune to build. Now Diamond Stairs has designed a prefab cantilevered stair that lets anyone break the building codes by building a stair without a guard or handrail. (They do have an option for a glass guard, but it just isn't the same thing)