- Replace the stair created in the previous exercise with a new steeper stair with only 16 risers:
- Open the Stairs tool, edit the type properties, choose the Residential – Open Riser type, duplicate it, and rename the new type Residential – Open Riser – Steep.
- Set the properties for this new type to allow a maximum riser height of 9" (0.23 meters) and a minimum tread depth of 9" (0.23 meters) then create a new stair using this type to replace the old one.
- Change the railing on the stair to Handrail – Pipe.
- Create a spiral stair with 15 risers and run radius of 2'-0" (0.6 meters) to connect the first and second floor of the residence:
- Open the Stairs tool and duplicate the Residential – Open Riser type again, renaming the new type to Residential – Open Riser – Spiral.
- Set the maximum riser height to 10" (0.25 meters) and the minimum tread depth to 11" (0.28 meters).
- Using the curved run line option, try sketching a spiral stair using this type. The sketch cannot be completed, because the rotation required exceeds 360°.
- Change the instance properties for this stair to set the Actual Tread Depth property to 10" (0.25 meters). This value will override the minimum value specified in the type properties.
- Resketch the spiral stair using these new properties and move it to the location shown in Figure 1.4.6.
Figure 1.4.6 - Placement of spiral stair in the residence
- Change the spiral stair’s railing to Handrail – Pipe and add a center pole as shown in Figure 1.4.7 using the views First Floor – Spiral Stair and Second Floor – Spiral Stair as guides.
Figure 1.4.7 - Spiral stair with pipe railing and center column