A non-prismatic girder has section properties properties that vary along its length.

Girder Properties

Define the girder as a sequence of discrete sections that vary linerally over a length.

Use the [+] and [-] buttons to define girder sections.

Section properties are defined at the start and end of each section. Properties are linerally interpolated along the section.

Item	Description
Height	Overall height
Wtf	Top width
Wbf	Bottom width
Area	Cross sectional area
Ix	Moment of inertia about the horizontal centroidal axis
Iy	Moment of inertia about the vertical centroidal axis
Yt	Location of the centroid measured down from the top of the girder
L	Length of girder section

Dead Loads

The self weight of the girder is computed from the section properties and the unit weight with reinforcement. Additional dead loads can be modeled.

Item	Description
Unit Weight	Unit weight of concrete used to compute modulus of elasticity
Unit Weight with Reinforcement	Unit weight of concrete and reinforcement. Used to compute dead load.

Additional Dead Loads

Additional dead loads are modeld as discrete point loads. These loads could represent the weight of cast in place diaphragms.

Use the [+] and [-] buttoms to add and delete additional dead loads.

Item	Description
X	Location of the load measured from the left end of the girder
P	Magnitude of the load (positive values for downward/gravity loads)

Wind Characteristics

Enter the girder drag coefficient. This coefficient is used for computing wind pressure loading per LRFD 3.8.3.1. The Florida Department of Transportation has undertaken a significant amount of research to establish the following guidance for horizontal drag:

Cd = 2.2 for I-shaped girders with no deck forms in place
Cd = 1.5 for U-shaped girders with no deck forms in place

Prestress Arrangement

The prestressing may be defined with a Simplified or Detailed arrangement. A simplified arrangement consists of parameters that describe the location of the prestressing force as well as a prestress transfer length. The prestressing force is defined on the Lifting and Hauling views. In a detailed arrangement, the location and magnitude of the prestressing force is defined at discrete locations along the girder. This is accomplished in the Lifting and Hauling views.

Use the drop down list to select the Prestressing Arrangement

Item	Description
Simplified	A simplified prestressing arrangement will be used
Detailed	A detailed prestressing arrangement will be used

Simplifed Arrangement Parameters

Item	Description
Prestress Transfer Length	Length from the ends of the girder that the prestress force is increased from zero to its full value
Ys	Location of the straight strands measured from the Top/Bottom face of the girder
Xh1-4	Location of the harp points measured from the left end of the girder as distance or a percentage of the girder length
Yh1-4	Location of the harp points measured from the Top/Bottom face of the girder
Yts	Location of the temporary strands