2. Bridge Geometry

This section defines the geometric layout of the bridge, including alignments, support locations, and girder positions.

Complete these definitions in order. Each subsequent step depends on the previous definitions.

Geometry Definitions

Definition	Description
Roadway Alignment	Horizontal and vertical alignment of the roadway
Bridge Alignment	Bridge centerline referencing the roadway alignment
Support Lines	Pier and abutment locations along the alignment
Insertion Point	Reference points for girder positioning
Girder Layout	Lateral spacing and arrangement of girders

Geometry Parameters for This Example

Parameter	Value
Span Configuration	160 ft - 210 ft - 160 ft
Horizontal Curve Radius	700 ft
Number of Girders	4
Girder Spacing	Variable (curved alignment)
Deck Width	40.5 ft
Superelevation	5%

Workflow

1. Roadway Alignment: Define horizontal curve and vertical profile

2. Bridge Alignment: Reference the roadway alignment for the bridge centerline

3. Support Lines: Place 4 support lines at pier and abutment locations

4. Insertion Points: Define 4 insertion points with transverse offsets

5. Girder Layout: Create 4 girder layouts connecting the insertion points