The Geometry tab allows you to input the physical properties of the bridge. Bridge alignments can be described, thus allowing CIP RC/PT Girder to automatically calculate the span lengths along the bridge and girder centerlines. Substructure properties, including pier skews and column spacing, can also be described. This allows the program to calculate varying support-to-support distances across the width of the structure and determines the modified stiffness effects. Superstructure and column cross sections can be entered parametrically, thus providing simplified methods for describing longitudinal variations such as parabolic structure depths, and girder, slab, and column flares. Using this tab, you can create, modify, or delete elements of your bridge description. The weights of crash barriers, footpaths, and wearing surface, if "Included", are automatically added to the Loads/Analysis tab. This information is also used to calculate the carriageway width.

Geometry tab for Box, T-beam, or slab Bridges

Geometry tab for I girder Bridges

Setting	Description
Alignment	Click to create and/or modify the Bridge Alignment dialog box.
Layout	Click to create and/or modify the bridge connections.
Cross Section (for Box, T-Beam, or slab bridges)	Click to create and/or modify the superstructure cross section and/or layout.
Span (for I-Girder bridges)	Click to define spans. Refer to the topic "Multi-Span Screen" in CONSPAN User Manual for details. For each span the following can be specified: Deck: Width, Thickness, and Material. “Begin” and “End” refer to the beginning and the end of the span, respectively. Haunch: Width, Thickness, and Material. Haunch refers to the additional concrete between the top of the girder and the bottom of the deck assumed to have constant thickness in the span. Girder: Girder Clr (clearance), and Material. Clearance refers to the offset between the end of the girder and the center of bearing. “Begin” and “End” refer to the beginning and the end of the span, respectively. Girder Type: Select girder type from the library. Number of Girders For each girder in the span, the following can be specified: Begin and End Distances From Prev: These fields are used to define the plan layout of the girders. “Prev” refers to the edge of deck for Girder 1 and the centerline of the previous girder for other girders. “Begin” and “End” refer to position of the girder at the beginning and the end of the span, respectively. Variation: For each girder the length and width of the End Block and the Taper Section at the start and end of the girder can be specified.
Pier	Click to create and/or modify the bridge piers/substructure.
Sect	Click to display the bridge section in the graphics window.
Elev	Click to display the bridge elevation in the graphics window.
View Control	Adjust the bridge's current view location in the graphics window.
Graphics window-Plan View	Display a plan view of the bridge.
Graphics window-Elevation View	Display either the section or elevation view of the bridge.
Crash Barriers	Click to define crash barriers, footpath, and wearing surface.
Diaphragm (for I-Girder bridges)	Click to define diaphragm.

Using the View Control

Adjust the structure's current view location by:

• Selecting the Elevation (Elev) view to display a developed elevation view of the bridge and, if using girder analysis, will also allow you select the elevation along the centerline of each girder.
• Selecting the Section (Sect) view to display the cross section at the specified station.
• Clicking and dragging the slider to define an approximate view location.
• Entering the exact location value and then clicking the Apply button to apply the location value to the view.