Dead Loads

Dead loads on precast can be modeled only as Line, Trapezoidal, or Point Loads; however, dead loads on composite can be modeled as Line, Trapezoidal, Point, and Area loads. In the case where you specify an area load and a width over which this load applies, Precast/Prestressed Girder multiplies the two together and analyzes it as a line load acting on the continuous beam model, as discussed in the previous section. The resulting moments and shears are then distributed to each beam using the dead load distribution/tributary fraction factors.

	Load Type	Distribution to Girder
Non-Composite Loads	Self weight of girder	Computed by program.
Non-Composite Loads	Self weight of Haunch	Calculated by program based on tributary width of slab.
Non Composite Loads	Self weight of Sacrificial Deck Thickness and Effective Slab Thickness	Calculated by program based on tributary width of slab.
Non Composite Loads	Dead Loads on Precast	User input per girder.
Non-Composite Loads	Diaphragm loads	User input per girder.
Composite Loads	Dead load on composite	User input for bridge, auto-distributed to girder based on tributary width fraction.