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Bridge Parameters

Insertion Points should be defined to determine the girder layouts and to model bearing locations. Generally, it is recommended to have one insertion point for each bearing.

Location: When you click on the location cell and then on the appearing three dots, the option ‘Set options 'Set to … (Support Lines created)’ ' or ‘Select’ 'Select' should be visible. For defining A previously defined support line should be used to define the locations of insertion points, a support line which was previously defined should be used.

Longitudinal Offset: The longitudinal offset refers to the offset value along the direction of PGL (Proposed Grade Line).

Transverse Offset: The transverse offset refers to the offset value perpendicular to the PGL.

Station on PGL (readonly): Displays the station of the insertion point along PGL and with respect to PGL.

When working with a support line that has a skew angle greater than 0 in OpenBrIM, it is important for users to specify the transverse offset(T) along the support line, not along the PGL(Y). This is demonstrated in the figure below.

If a support line has a skew angle greater than 0 and longitudinal offsets greater than 0 are being used, then the longitudinal offset parameter is applied perpendicular to the support line.