Detail Mode

Structural Design User Guide

Stair Flight : Detail Mode

In the Detail mode, extra functionality is available to the user. From the STAIRS LADDERS HANDRAILS tab, in the Create group, click Stair Flight to display the Create Stair Flight window. By default the Layout is selected, select Detail.

General Attributes

The General Attributes part of the Create Stair Flight window, the functionality available to the user is identical to that in Layout Mode. For more information, refer to General Attributes.

Reference Points

The Reference Points part of the Create Stair Flight window, with Detail selected has the mostly the same functionality as that available from Layout with the exception of the connections in the Pick Support Element functionality. This functionality is also available to the ‘TO’ Reference Point.

Pick Support Element

Use to select a support element (GENSEC or SCTN) in the 3D view, selecting a support element offsets the stringer so that the stringer top of steel is flush with the top of steel of the support element. It also establishes a connection between the stringers and the support element and for this reason, only GENSEC’s and SCTNs are valid for picking. The support element must be horizontal, Click Pick Support Element, the user is prompted to ‘SLH - Stair Flight - Pick FROM Support Element’.

Floor Thickness

The Floor thickness is the offset automatically calculated when a support is selected and the MODEL offsets the stringer of the stair flight element so that the stringer TOS is flush with the top of the TOS of the selected support element.

Without picking a support element, the user can input a floor thickness.

Select the Connect check box to establish the connections.

In the structural hierarchy, Secondary Node (SNOD) and SJOI elements are created, for more information on these elements refer to Secondary Nodes and Secondary Joint.

TO Reference Point

The functionality available to the user is identical to that in Layout. For more information, refer to Reference Points.

Stair Configuration

The Stair Configuration part of the Create Stair Flight window, with Detail selected has the mostly the same functionality as that available from Layout with the exception of the Pitch Validation functionality.

From the Stair Configuration part of the Create Stair Flight window, the user can use the X Offset and Nudge functionality to move the stair flight element along the upper reference edge.

X Offset

If required, the user can offset the stair flight with respect to the centreline itself. For more information, refer to X Offset

Nudge

Used for positioning the stair flight along the upper reference edge, for more information refer to Nudge

Pitch Validation

The Pitch Validation part of the Stair Configuration window, enables the user to modify the desired pitch and as a result the number of rises. It also provides the obtained pitch and an overview of the rise, going and validation for each rises.

Note:

Validation formulae in the defaults file are selected by the administrator, for more information refer to the SLH Admin Guide.

Desired Pitch

The user can modify the desired pitch within the boundaries of the standard. However the user only modifies the optimum pitch in the default for the currently selected configuration temporarily. This means that the circle in the list of configurations stays green as long as the SLH application does not alter the pitch.

To display the Desired Pitch in the 3D graphical view, select Display.

Note:

All the pitches within the boundaries set in the default are available for selection, but the SLH application won’t necessary be able to build a stair with that pitch if the reference edges are positioned too close.

Obtained Pitch

The Obtained Pitch field of the Pitch Validation part of the Stair Configuration window, displays the pitch that is obtained for the currently selected configuration.

The user can if required, select another number of rises (as long as they are available for selection), modifying the number of the rises impacts the pitch, rise, going and validation.

Modifying one value may alter others as well. It means that changing the desired pitch produces a different subset of valid number of rises. However, while changing the number of rises alters, for instance extension lengths, it will not change anything prior to the selection of number of rises.

To restore the real optimum pitch (recalculate all configurations and remove any modifications), select the default.

Extension and Landings

The Extension and Landings part of the Create Stair window, with the Detail mode selected has the mostly the same functionality as that available from the Layout mode with the exception of the Stringer functionality.

Only available in Detail, the user can if required crank the bottom of the stringers or extend them through the floor.

Cranked Bottom

From the Stringer Options part of the Extension and Landings window, select the Crank Bottom of Stringers (only for stairs to a plane) check box. The stringers of the stair are cranked at the selected plane and displayed as such in the 3D view.

Extend Bottom Through Floor

Where the bottom of a stair flight is coming down to a plane which may be, for example a grated or plated platform, the stringers may need to be extended through the thickness of the grating/plating to support members below.

From the Stringer Options part of the Extension and Landings window, select the Extend Bottom Through Floor check box. The stringers of the stair are cranked at the selected plane and displayed as such in the 3D view.

Landing Floor Finish Level

The user can specify if the landing (represented as a PANE element) is on top of or flush with TOS of the stringers, from the Finished Floor Level part of the Extensions and Landings window, select Above TOS or Flush with TOS.


	Above TOS
	Flush TOS

Specifications

The Specifications part of the Create Stair window, with Detail selected is populated with the specifications available for selection for the stringers and treads of the stair flight element.


Stringer Spec	A list of available stringer specifications is displayed. Valid stringer profile specs are defined by the System Administrator in the selectable SLH defaults.
Tread Spec	A list of all the available tread specifications is displayed. A visual representation is displayed below the Tread Spec. They are also specified by the administrator in the defaults file and point to a GPART that can point to either a template or a catalogue reference. All treads are specified by the SLH administrator, for more information refer to SLH Administrator Guide.

Handrails

Unlike in the Layout mode, adding handrails to a stair flight element in the detail mode is a separate task using the Create Handrails functionality. For more information, refer to Handrails.

Stair Flight Summary

The Stair Summary part of the Create Stair Flight window, is populated with the main attributes of the stair flight. If required, before the creation of the stair flight element the user can select the attribute by name and modify it from the automatically appropriately displayed part of the Create Stair Flight window.