Stair Flight Constraints
- Last UpdatedFeb 23, 2023
- 3 minute read
Constraints allow the administrator to specify the standard to be used for the stair flight and the default values. SLH checks to make sure that the default values are between the minimum and maximum values specified in the standard.
To remove the Stair Flight element from the Defaults, click to clear the Included check box.
Select a standard from the Use min/max values from standard drop-down list to specify the standard on which the defaults are to be based.
To visualize how the constraints equate to the stair flight, click Show diagram to display the Stair Flight Parameters window.
The Constraints list is populated with the minimum and maximum values from the selected standard.
By default, SLH populates each cell with the minimum column of the Constraints list with a minimum standard value or the maximum column of the Constraints list with a maximum standard value. Acceptable values input by the administrator into the cell of the Constraints list are highlighted in grey.
The administrator can input an explicit valid value into the Valid Value cell if the cell is not highlighted with a background color.
If a value is entered and it is incorrect, an error message displays summarizing the problem.
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Use pitch formula rather than angle to calculate stair |
By default, the stair flight is calculated from the angle, select the check box to calculate the stair flight from the pitch formula. |
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Allow intermediate landing |
Select the check box to enable the user to define an intermediate landing for the stair flight, when the maximum number of rises is exceeded. Selecting the Allow intermediate landing check box displays the Default Landing Thickness field. |
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Default Landing Thickness |
Input a default value for the landing thickness in the field. |
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Allow cranked stringer |
ONLY available when 'To plane' functionality is used. Select the check box to enable the user to define a cranked stringer for the stair flight. |
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Extensions |
Extensions are horizontal landings at the top and bottom of a stair flight. |
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Minimum Extension - default minimum extension. |
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Maximum Extension - default maximum extension. |
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Nosing Offset |
ONLY available for selection in Detail. The distance between the nose of the tread to the front edge of the stringer. This is measured from the nosing of the treads perpendicular to the front edge of the stringer. The administrator can input a value into the optional field. |
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Allowable Configurations |
Select the check boxes to enable the user to define a configuration for the stair flight. Note: The administrator can choose from:
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Click Next to display the Detailing for Stair Flight part of the Create Defaults window. Refer to Stair Flight Detailing for further information.
Click Back to return to the General part of the Create Defaults window.
Click Cancel to discard any inputs and return to the SLH Administration Tasks window.