Stair Flight (STRFLT) Hierarchy

The Stair Flight element (STRFLT) is a top level administrative element owned by a STRU element.

The STRFLT as a steelwork assembly enables the user to create a rule based linear Stair Flight and it introduces a middle tier hierarchy to enable the decomposition of the STRFLT assembly into its logical component parts, the existing lower level elements of GENSEC and PANEL are used to represent the detail of the 3D model.

Stair Stringer (STRSTR)

STRSTR owns the two GENSEC elements used to model the main supports of the Stair Flight. The GENSEC elements are automatically miterd by the application at the upper and lower elevations of the STRSTR, dependent upon the relevant Selections.

Route Path (RPATH)

The Routing Path element defines an open path or closed boundary using the following:

• Free form sketching

• Tracing existing profiles or boundaries.

Route Point (POINTR)

POINTR elements are significant point references which form the RPath.

Top Extension (TOPEXT)

TOPEXT owns the PANEL element used to model the physical representation of the top extension of the stair flight. It is defined by the extrusion of a profile representing the panel's shape (the Panel Loop. PLOOP) through a given distance (equivalent to the panel thickness). A PAVE element defines each vertex of a Panel Loop.

Bottom Extension (BOTEXT)

BOTEXT owns the PANEL and Stringer elements used to model the physical representation of the bottom extension of the stair flight. It is defined by the extrusion of a profile representing the panel's shape (the Panel Loop. PLOOP) through a given distance (equivalent to the panel thickness). A PAVE element defines each vertex of a Panel Loop.

Intermediate Landing (INTLNG)

INTLNG owns the PANEL and Stringer elements used to model the physical representation of the intermediate landing of the stair flight. It is defined by the extrusion of a profile representing the panel's shape (the Panel Loop. PLOOP) through a given distance (equivalent to the panel thickness). A PAVE element defines each vertex of a Panel Loop.

Tread Set (TREADS)

The TREADS element is used to manage the ownership of individual TREAD elements.

Tread (TREAD)

TREAD owns the elements used to model the rise or tread in the STRFLT. The vertical position between the Tread is measured from Top of Plate to the next Top of Plate and represents the Rise attribute on the STRFLT.

PANEL, TMPL or Catalog elements can be used to model the rise or tread in the STRFLT.

Description of Stair Flight Elements

The following figure shows some of the attributes of the STRFLT elements and the elements that it owns. The figure also indicates the engineering significance of the attributes to the geometrical representation of the STRFLT.

Upon creation of the Stair Flight the system analyzes the horizontal (Overall Going) and vertical (Overall Rise) distances between the Lower and Upper Work Points (LWP/UWP) and validates these positions against the engineering criteria of the Stair Flight to the criteria of the current specification. If the system analysis validates the values against the engineering criteria the system creates the Stair Flight and populates the attributes with the appropriate data.