OpenBuildings™ Station Designer Help

Stair Construction Settings - General tab

Used to set or modify the common geometrical properties for a stair assembly.



SettingDescription
Stair Height Sets the overall height of the stair assembly. This is the same value set through the Place Stair properties (fixed height stairs). For floor constrained height stairs, displays the height of the stair assembly. In this case the floor definition controls the actual height. It is set as an absolute height of the active floor.
Tip: The Stair Height property is used to quickly alter the height of the stairs in a model should design changes demand. When a change in the stair height is applied, the stair assembly adjusts the number of treads in the last flight. It restricts the height by keeping at least two treads in the last flight. When reducing the height of a multi-run stair, the landing in the last flight needs to be manipulated to keep it safe within the desired height.
Stair Width Displays the overall width of the stair. This is the value set through the Place Stair properties. You can alter the stair width to suite the design by entering new value here or via the heads-up display.
Stair Actual Slope Displays the actual angle, in working units, of the stair assembly as assembled. The slope is the calculated value of ratio between riser actual height and tread depth.
Begin with Riser Determines if the stair begins with a riser (True) or a tread (False). Applicable to non-monolithic stairs.


Begin stair with riser (left), tread (right)

Note: The setting does not affect the risers or riser height.
Note: Stairs not beginning with a riser place a tread, thereby increasing the stair length by the tread depth and extends the stringer where applicable.
End with Riser Determines if a stair ends with a riser (True) or not (False). Applicable to non-monolithic stairs.


End stair with riser (left), tread (right)

Note: The setting does not affect the risers or riser height.
Begin with Riser at Landings Determines if the stair begins with a riser at the end of the flight (True) or not (False). Applicable to non-monolithic stairs.
End with Riser at Landings Displays setting if stair should end with a riser at landing. Applicable to non-monolithic stairs.
  • True - sets option to end stair with a riser at landing.
  • False - sets not to end stair with a riser at landing.
Note: Both, the "Begin with.. " and "End with.." Riser at Landings settings are disabled in case of Non Monolithic Spiral and Winder stairs.
Monolithic Determines if the stair is to be constructed as a single monolithic element (True) or with separate stair tread and landing objects (False).
Note: Only non-monolithic stairs enable the Begin/End with Riser settings (Risers tab).
Note: Monolithic stairs disable most settings in the Risers and Stringers tabs.
Monolithic Underside Profile Enabled when monolithic property is set true. Sets underside profile of the monolithic stair assembly.


Smooth (left), Stepped (middle), Massed (right)

Monolithic Part Definition Sets the monolithic stair family and part definition pair.


Placement family & parts - example, Part assigns matl_Stair_Monolithic

Family and Part assignments can be applied to straight/slanted panels and for planar and parametric profile risers. The selected Part option overrides the native definitions of family part, if any in the profile.
Walkline Offset Displays the value of the offset set for the walkline. The default offset is mid-way, that is half the stair width for centered type, or less as set using the custom type.
Walkline Offset Type Sets the walkline offset to:
  • Centered – the offset is determined about the half the value of stair width,
  • Custom – when set, you can set the walkline offset value lesser than the default centered.
Note: Both, the Walkline Offset and the Walkline Offset Type settings are enabled for Winder stairs.