Reference Points

To create a new STRFLT element, you must select a start (FROM Reference Point) and end (TO Reference Point), from the Reference Points part of the Create Stair Flight window. By default no reference points are selected.

You can use three methods to create a new STRFLT element:

Edge to Edge - allows you to select any horizontal edge as the FROM or TO Reference Point to anchor the STRFLT element (the order in which the selection is made is not relevant).

Edge to Plane - allows you to anchor the FROM point and then select the TO point (the elevation of the lower reference point).

Calculate - allows you to anchor the FROM point and calculate the TO point using a set of defined parameters.

The edge to calculated position stair flight functionality can be turned on or off. Refer to Structural Defaults for further information.

Edge to Edge

The order in which you select the reference points is not relevant, you can select any horizontal edge as the FROM or TO Reference Points to anchor the STRFLT element.

Note:
The direction of the stair flight is determined by which reference point is selected first.

If you select the FROM Reference Point first, from the FROM Reference Point part of the Reference Points window, select Pick Edge (FFL). You are prompted to SLH Stair Flight - Pick FROM Edge. Once the edge has been selected it is labelled as FROM Edge in the 3D view.

From the TO Reference Point part of the Create Stair Flight window, select Pick Edge (FFL), you are prompted to SLH Stair Flight - Pick TO Edge. Once the edge has been selected it is labelled as TO Edge in the 3D view.

The Evaluation part of the Create Stair Flight window is populated with feedback on the reference points. When the selected reference points are acceptable, a message displays: The selected reference points successfully passed an initial check.

The Stair Summary part of the Create Stair Flight window, is populated with the Overall Rise, Going and Tread Width.

If required, you can modify the TO and FROM Reference Points explicitly, the functionality to modify either edge position is identical. For the purposes of this guide, only the FROM Reference Point is described.

To modify the FROM Reference Point position explicitly, from the FROM Reference Point part of the Create Stair window, select Modify Position to display the FROM Position window.

Modify the position of the FROM Reference Point position as required.

Click Offset to modify the position of the FROM Reference Point as an offset value measured from the original position. Click Return from offset mode to exit the offset display.

Click Apply to modify the position and close the FROM Position window, or click Dismiss to discard any changes and close the window.

Note:
Modifying the FROM or TO Position does not reset the stair direction.

Edge to Plane

Used when creating an edge to plane stair flight, the STRFLT element is anchored at the upper reference point and the lower reference point is located freely on the chosen elevation. You must select the upper reference point first, the functionality is identical to that when creating an edge to edge STRFLT element (the FROM or TO Reference Point).

Once the elevation of the lower reference point has been selected, it is labelled as TO Plane in the 3D view and the Elevation field is populated.

Flip Stair Flight Direction

If required, you can alter the direction of the STRFLT element, from the TO Reference Point part of the Create Stair Flight window, click Flip Stair Flight Direction.

The stair flight direction is ‘flipped’ 180 degrees.

Pick Support Element

Used to select a support element (GENSEC) to connect to in the 3D view and therefore determines the Elevation, Floor Thickness and sets stringer elevation extensions. The selection of a support element offsets the stringer so that the stringer top of steel is flush with the top of steel of the support element, the support element must be horizontal.

From the TO Reference Point part of the Create Stair Flight window, click Pick Support Element. You are prompted to SLH Stair Flight - Pick FROM Support Element.

Edge to Calculated Position

Used when creating an edge to calculated position stair flight, the STRFLT element is anchored using a FROM reference point. The TO reference point is defined using a set of defined parameters and does not need to be connected to another element.

Note:
The edge to calculated position stair flight functionality can be turned on or off. Refer to Structural Defaults for further information.

You must first select the FROM reference point, the functionality is identical to that when creating an edge to edge STRFLT element.

Select the Up or Down option button to define the direction of the stair flight from the point of origin.

If required you can alter the direction of the STRFLT element, the functionality is identical to that when flipping an edge to plane STRFLT element.

Click Next to display the Stair Configuration part of the Create Stair Flight window. Refer to Stair Configuration for further information.

Click Back to return to the General Attributes part of the Create Stair Flight window.

Click Cancel to discard any inputs and close the Create Stair Flight window.