Left and right curb widths. Precast/Prestressed Girder uses this information for computing the number of lanes and calculating the live load distribution factor based on the lever rule.

The effective thickness of the cast-in-place deck. Precast/Prestressed Girder automatically computes the dead load of this deck and also considers entire thickness to be effective for computing composite section properties.

Enter the sacrificial wearing surface/deck thickness. The program automatically computes the self weight due to this thickness, and shows it as dead load on precast in the results. This thickness is not used in composite section properties computation.

The haunch or concrete build-up thickness.

The haunch or concrete build-up width. Could be less than the flange width if using stay-in-place forms.

Angle between the centerline of a support and a line normal to the roadway centerline. Used for adjusting LRFD distribution factors, as specified in Art. 4.6.2.2.3c and Art. 4.6.2.2.2e.

Precast/Prestressed Girder allows the user to enter a starting skew angle as well as an ending skew angle for each span. In LRFD mode, when using the AASHTO formulae for computing the Moment Distribution skew correction factors, the smaller of these two angles is used. When computing the Shear Distribution skew correction factors, the larger of the two skew angles specified for the spans is used. When the refined method of analysis is used in either specification mode, the program sets up the grillage model considering the true bridge geometry created by these two skew angles. The input fields are grayed out in the Standard Specifications (LFD) mode, unless the option to use refined methods of analysis has been selected in the Analysis Factors dialog box.

Number of lanes.

This field is for beam type selection. Select a beam type from the list. To access the list, click the down-arrow button to the immediate right of the field, the list of available beams will appear. For additional information, refer to Libraries | Beam Sections. Note it is important to select the correct beam type since the program uses this information to calculate distribution factors.

This field is the name of the section within the beam type chosen. Select a beam ID from the list.

The distance from the CL of selected beam to the CL of the beam to its left. For the first beam, enter the distance from the left edge of the bridge to the centerline of the first beam.

For multi-spans only. Distance between centerlines of piers. The pier-to-pier dimensions are used in the continuous beam model to calculate the dead load acting on the composite section and for live load analyses. The distance from CL of pier to CL of bearing at abutment is used to calculate the pier-to-pier dimension in end spans of continuous units.

The overall length of the precast beam.

The CL of bearing to CL of bearing length. This is the design length.

For multi-spans only. Horizontal distance measured from left pier centerline to left precast beam end. This value is positive if the CL of pier is to the left of the precast end; otherwise it is negative. The distance is zero (0) if the precast end coincides with the pier CL.

The span length used to compute moments at release for the release stress check. Release span is typically set equal to the precast length.