Web Instance Properties

Name	Description
Constraints
Reference Level	Specifies the reference level for the structural framing member. Read-only when pinned.
Cross Section Rotation	Specifies the rotation angle of the member about its location line. Parameter is reset to the value specified in truss family for top or bottom chord respectively. Read-only when pinned.
Construction (Pre 2014 projects)
Start Extension	Specifies the distance between the physical geometry and the end of the location line for the start of the member. This parameter is only available in projects created in versions prior to Autodesk Revit 2014 containing beam families that have not been updated. It is recommended to use the Geometric Position Start Extension below. Using both is an additive extension.
End Extension	Specifies the distance between the physical geometry and the end of the location line for the end of the member. This parameter is only available in projects created in versions prior to Autodesk Revit 2014 containing beam families that have not been updated. It is recommended to use the Geometric Position Start Extension below. Using both is an additive extension.
Materials and Finishes
Beam Material	Standard material parameter from the structural framing family. This parameter is not affected by re-pinning.
Structural
Moment Connection Start	Specifies whether a moment connection symbol is shown at the start of the member coarse representation when viewed in elevation.
Moment Connection End	Specifies whether a moment connection symbol is shown at the end of the member coarse representation when viewed in elevation.
Cut Length	A standard read-only parameter from the structural framing family.
Structural Usage	Specifies the structural usage for the member: either Girder, Horizontal Bracing, Joist, Other, Purlin, or Chord. The value is not reset when the member is re-pinned. This value is read-only when pinned.
Dimensions
Length	A standard read-only parameter from the structural framing family.
Volume	A standard read-only parameter from the structural framing family.
Geometric Position
Start Extension	Applies to steel beams only. The dimension between the edge of the start end of the beam and the element to which it is connected. Pinning a web member will revert geometric positioning parameters to the default truss settings.
End Extension	Applies to steel beams only. The dimension between the edge of the finish end of the beam and the element to which it is connected. Pinning a web member will revert geometric positioning parameters to the default truss settings.
Start Join Cutback	Applies to steel beams only. The dimension between the edge of the start end of the beam and the element to which it is connected. Only for joined start of element. Pinning a web member will revert geometric positioning parameters to the default truss settings.
End Join Cutback	Applies to steel beams only. The dimension between the edge of the finish end of the beam and the element to which it is connected. Only for joined end of element. Pinning a web member will revert geometric positioning parameters to the default truss settings.
yz Justification	Applies to steel beams only. Either Uniform or Independent. Uniform allows setting the same parameters to both start and end of a beam. Independent allows setting different parameters to start and end of a beam. Pinning a web member will revert geometric positioning parameters to the default truss settings.
y Justification	Applies to Uniform justified steel beams only. Specifies the location of the physical geometry with respect to the location line: either Origin, Left, Center, Right. Pinning a web member will revert geometric positioning parameters to the default truss settings.
y Offset Value	Applies to Uniform justified steel beams only. The numeric value that offsets the geometry. The distance between the location line and the characteristic point set in y Justification parameter. Pinning a web member will revert geometric positioning parameters to the default truss settings.
z Justification	Applies to Uniform justified steel beams only. Specifies the location of the physical geometry with respect to the location line: either Origin, Top, Center, Bottom. Pinning a web member will revert geometric positioning parameters to the default truss settings.
z Offset Value	Applies to Uniform justified steel beams only. The distance between the location line and the characteristic point set in z Justification parameter. Pinning a web member will revert geometric positioning parameters to the default truss settings.
Start y Justification	Applies to Independent justified steel beams only. Specifies the location of the physical geometry of the start end of the beam with respect to the location line: either Origin, Left, Center, Right. Pinning a web member will revert geometric positioning parameters to the default truss settings.
Start y Offset Value	Applies to Independent justified steel beams only. The numeric value that offsets the geometry at the start end of the beam. The distance between the location line and the characteristic point set in the Start y Justification parameter. Pinning a web member will revert geometric positioning parameters to the default truss settings.
Start z Justification	Applies to Independent justified steel beams only. Specifies the location of the physical geometry with respect to the location line at the start end of the beam: either Origin, Top, Center, Bottom. Pinning a web member will revert geometric positioning parameters to the default truss settings.
Start z Offset Value	Applies to Independent justified steel beams only. The numeric value that offsets the geometry at the finish end of the beam. The distance between the location line and the characteristic point set in the Start z Justification parameter. Pinning a web member will revert geometric positioning parameters to the default truss settings.
End y Justification	Applies to Independent justified steel beams only. Specifies the location of the physical geometry of the finish end of the beam with respect to the location line: either Origin, Left, Center, Right. Pinning a web member will revert geometric positioning parameters to the default truss settings.
End y Offset Value	Applies to Independent justified steel beams only. The numeric value that offsets the geometry at the start end of the beam. The distance between the location line and the characteristic point set in the End y Justification parameter. Pinning a web member will revert geometric positioning parameters to the default truss settings.
End z Justification	Applies to Independent justified steel beams only. Specifies the location of the physical geometry of the finish end of the beam with respect to the location line: either Origin, Left, Center, Right. Pinning a web member will revert geometric positioning parameters to the default truss settings.
End z Offset Value	Applies to Independent justified steel beams only. The numeric value that offsets the geometry at the start end of the beam. The distance between the location line and the characteristic point set in the End z Justification parameter. Pinning a web member will revert geometric positioning parameters to the default truss settings.
Identity Data
Comments	A field for entering comments about the truss web.
Mark	The standard Object parameter. The value is unique per instance.
Phasing
Phase Created	Indicates in which phase the truss component was created. For more information, see Project Phasing.
Phase Demolished	Indicates in which phase the truss component was demolished. See Project Phasing.
Structural Analysis
Start Release	Specifies one of 3 pre-defined member end release conditions at the start of the member: either Fixed, Pinned, Bending Moment, or User Defined. Re-pinning the member resets the parameter to the setting in the truss layout family. This value is read-only when pinned.
Start FX	The translational release at the start end of the web along the x-axis. This value is read-only when pinned.
Start FY	The translational release at the start end of the web along the y-axis. This value is read-only when pinned.
Start FZ	The translational release at the start end of the web along the z-axis. This value is read-only when pinned.
Start MX	The rotational release at the start end of the web along the local x-axis. This value is read-only when pinned.
Start MY	The rotational release at the start end of the web along the local y-axis. This value is read-only when pinned.
Start MZ	The rotational release at the start end of the web along the local z-axis. This value is read-only when pinned.
End Release	Specifies one of 3 pre-defined member end release conditions at the end of the member: either Fixed, Pinned, Bending Moment, or User Defined. Re-pinning the member will reset the parameter to the setting in the truss layout family. This value is read-only when pinned.
End FX	The translational release at the end of the web along the x-axis. This value is read-only when pinned.
End FY	The translational release at the end of the web along the y-axis. This value is read-only when pinned.
End FZ	The translational release at the end of the web along the z-axis. This value is read-only when pinned.
End MX	The rotational release at the end of the web along the local x-axis. This value is read-only when pinned.
End MY	The rotational release at the end of the web along the local y-axis. This value is read-only when pinned.
End MZ	The rotational release at the end of the web along the local z-axis. This value is read-only when pinned.
Other
Start Extension Calculation	Applies to steel beams only. Specifies family parameters; defines maximum distance of start extension parameter. This parameter is only available in projects created in versions prior to Autodesk Revit 2014 containing beam families that have not been updated. This is a read-only value.
End Extension Calculation	Applies to steel beams only. Specifies family parameters; defines maximum distance of end extension parameter. This parameter is only available in projects created in versions prior to Autodesk Revit 2014 containing beam families that have not been updated. This is a read-only value.