8

230 Chapter 5: Creating Geometry
informationonspacingoptionsinthisdialog,see
Spacing Tool (page 1–440) .
Spr ing f rom Fl oor—Controls whether the carriage
starts at the floor, flush with the start of the first
riser, or if the carriage extends below the floor. You
control the amount the carriage extends below the
floor with the Offset option.
Left: The carriag e springing from the floor. (Spring From
Floor o n.)
Right:Thecarriageextendingbelowthefloor.(Springfrom
Floor o ff.)
Railings rollout
These controls are available only when you turn on
one or more of the Handrail or Rail Path options
on the Parameters rollout > Generate Geometry
group. Also, S egments and Radius a ren’t available
if neither of the Handrail options is on.
Height—Controls the height of the railings from
the steps.
Offset—Controls the offset of the railings from the
ends of the steps.
Segments—Controls the number of segments
in the r ailings. Higher values display smoother
railings.
Radius—Controls the thickness of the r ailings.
Spiral Stair
Create panel > Geo m etry > Stairs > Spiral Stair button
Create menu > AEC Objec ts > Spiral Stair
The Spiral Stair object lets you specify the radius
and number of revolutions, add stringers and a
center pole, and more.
Types of spiral stair: open, closed, and boxed
Spiral stairs wind around a center
Procedure
To create spiral stair s:
1.
In any viewport, click for the start point of the
stairs, and drag to the specify the radius you
want.
2. Release the mouse button, move the cursor up
or down to specify the overall rise, and click
to end.
3. Adjust the stairs with options in the Parameters
rollout.
Interf ace
Parameters rollout > Type group
Open—Creates an open riser stair, as shown on the
left of the illustration above.