Stair Configuration
- Last UpdatedMay 05, 2023
- 5 minute read
The stair geometry for Edge to Edge or Edge to Plane stair flights is determined using one of two methods:
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Pitch Validation Formula - 2 x Riser + Going, where the ideal is to achieve a pitch as close to the pitch in the default file. The method is the default geometry calculation.
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Every step is exactly the same size, where the ideal is to achieve a going as close to the going in the default file.
Note:
For more information on the stair geometry calculation, refer to the administrator.
The stair geometry for Edge to Calculated Position stair flights is determined using a set of defined parameters.
By default, the Stair Configuration part of the Create Stair Flight window is populated with all the allowable configurations allowed in the defaults.
The configurations that display in the Stair Configuration part of the Create Stair Flight window are dependent upon which defaults are set by the administrator.
Edge-to-edge configurations:
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Extension at top and bottom |
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Top extension only |
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Bottom extension only |
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No extensions |
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Initial rise without extension |
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Initial rise with extension |
Edge-to-plane configurations:
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With top extension |
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Without top extension |
Edge-to-calculated position configurations:
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No extensions |
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Bottom extension only |
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Top extension only |
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Extension at top and bottom |
Offset
If required, you can offset the stair flight with respect to the centreline.
From the Stair Configuration part of the Create Stair Flight window, input the offset distance into the X Offset field then select X Offset from.
The Positioning Control window functionality allows you to pick positions in event-driven graphics mode. Refer to Positioning Control for further information.
Nudge
Used for positioning the stair flight along the upper reference edge. Input the nudge increment into the Nudge field (default 100mm), click the arrows to nudge the stair flight along the X axis in the 3D view.
Edge to Edge/Edge to Plane Edge Configurations
All of the configurations available for selection are displayed in the Stair Configuration part of the Create Stair Flight window. By default, the configuration closest to the defaults is highlighted.
Note:
All of the allowable configurations are ones that conform to the defaults and all
configurations that do not conform to the defaults but conform to the standard.
Edge to Calculated Position Stair Configuration
All of the configurations available for selection are displayed in the Stair Configuration part of the Create Stair Flight window.
Values can only be successfully entered if the value falls within the limits of the default being used and does not cause any other parameters to fall out of the permissible range.
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TO Elevation |
Input a dimensional value in the field to define the elevation position of the TO Reference Point. |
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Overall Rise |
Input a dimensional value in the field to define the overall rise of the stair flight. Select the Lock check box to lock the specified value. |
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Rise |
Input a dimensional value in the field to define the individual rise distance for the stair flight. Select the Lock check box to lock the specified value. Click Use Default to populate the Rise field with the default value. |
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Number of Rises |
Input a value in the field to define the number of rises for the stair flight. |
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Pitch |
Input an angular value in the field to define the pitch angle of the stair flight. Select the Lock check box to lock the specified value. Click Use Default to populate the Pitch field with the default value. |
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2 x Rise + Going |
Input a dimensional value in the field to define the overall 2 x rise and going distance. |
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Going |
Input a dimensional value in the field to define the individual going distance for the stair flight. Select the Lock check box to lock the specified value. Click Use Default to populate the Going field with the default value. |
Hover the mouse over a text field to display the allowable range for that parameter.
If a value is entered that is outside the allowable range, an error message displays summarizing the problem.
If a parameter is input that causes another parameter to fall outside the allowable range, an error message displays summarizing the problem.
The stair flight size and position is indicated in the 3D view.
Handrails
You can add handrails to the stair flight, from the Handrail part of the Create Stair Flight window, select from the Handrail Configuration drop-down list of available handrails.
Note:
The functionality is only available during the creation of a stair flight in Layout.
Click Next to display the Extension and Landings part of the Create Stair Flight window. Refer to Extension and Landings for further information.
Click Back to return to the Reference Points part of the Create Stair Flight window.
Click Cancel to discard any inputs and close the Create Stair Flight window.