X Type Diaphragm [SPIG]

Location

Girders: Pair of Spliced I Girders connected by the diaphragm. The diaphragm is drawn between the two picked girders.

Skew Angle: Rotation of the diaphragm about the vertical axis, relative to the line perpendicular to the alignment. Use angle units; zero is perpendicular to the alignment.

Station[Start/End]: Longitudinal position of the diaphragm along the PGL, entered as a distance. Use Start to reference from the span start, End to reference from the span end.

Sections

Diagonal Chord Section: Structural shape assigned to the X diagonal chord members (e.g., an angle or WT section).

Vertical Stiffener

Vertical Stiffener Thickness: Thickness of the vertical stiffener plate welded to the girder web.

Vertical Stiffener width: Width of the vertical stiffener plate measured transverse to the web.

Vertical Stiffener Depth: Depth of the vertical stiffener plate measured along the girder web.

Vertical Stiffener offset from top: Distance from the top of the girder web to the top of the stiffener.

Vertical Stiffener offset from girder web center: Horizontal offset of the stiffener from the girder web centerline.

Cross Frame Member Data

Diag. chord offset from top: Distance from the top working-point of the diagonal to the top flange (defines the diagonal's top end offset along the web).

Diag. chord offset from bottom: Distance from the bottom working-point of the diagonal to the bottom flange.

Geometry

Diag. chord Vert. offset from top edge of section: Vertical distance from the top edge of the chord section to the diagonal working point.

Diag. chord Vert. offset from bottom edge of section: Vertical distance from the bottom edge of the chord section to the diagonal working point.

Referencing Objects

Structure States: Optional list of structure states that activate this diaphragm in specific construction configurations.

Quantities

Volume: Total steel volume of the diaphragm, computed from the chord and stiffener sections (Read-only).

Weight: Total weight of the diaphragm, computed from the chord and stiffener sections times material density (Read-only).

Diagonal Chord Material: Material assigned to the diagonal chord section, shown from the diagonal section's material link (Read-only).

Diagonal Chord Section: Section name of the diagonal chord (Read-only).

Top Chord Material: Material assigned to the top chord section (Read-only).

Top Chord Section: Section name of the top chord (Read-only).

Bottom Chord Material: Material assigned to the bottom chord section (Read-only).

Bottom Chord Section: Section name of the bottom chord (Read-only).