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234 Chapter 5: Creating Geometry
Radius—Controls the radius size of the center pole.
Segments—Controls the number of segments in
the center pole. Higher values display a smoother
pole.
Height—Thespinnercontrolstheheightofthe
center pole. Turning on Height lets you adjust
the height of the pole independently of the stairs.
Turning off Height makes the spinner unavailable
and locks the top of the pole to the top of t he
implied last riser. Typically, this riser would attach
to the fasc ia of a landing.
Left: The center pole locked to the top of the implied last
riser. (Height turned off.)
Right: The center pole adjusted to the height you specify.
(Height turned on.)
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 heig ht of t he 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 railings. Higher va lues display smoother
railings.
Radius—Controls the thickness of the r ailings.
Straight Stair
Create panel > Geometry > Sta irs > Straight Stair button
Create menu > AEC Objects > Straight Stair
The Straight Stair object lets you create a simple
staircase, with optional stringers, c arriage, and
handrail.
Types of straight stair: open, closed, and boxed
Straight stairs have a single flight.