Loads Dialog
| Setting | Description | ||||
|---|---|---|---|---|---|
| Stage | This drop-down list will show each of the stages that were defined in the Deck Placement Sequence command. As each Stage is selected, the automatically generated load cases will appear on the left side of the dialog and the automatically generated load combinations will appear on the right side of the dialog. | ||||
| Load Cases | The right side of the Loads dialog allows viewing
and definition of all load cases that are supported by
LEAP Bridge Steel. These include:
Once load cases are defined they can be dragged and dropped to the desired Load Combination on the left side of the Loads dialog. See Editing Dead Load topic for help defining dead load. See Editing Live Loads topic for help defining live loads. See Editing Earthquake Load topic for help defining earthquake load
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| Load Combinations |
Each stage can contain one of more load combinations that will appear when the stage is selected from the Stage drop down list. Automatically generated combinations will appear that can be modified as required. Additional load combinations can be added for a stage if desired. Each combination will have a combination type (or limit state) selected that will define how the loads are factored for that combination. To add a combination click on the stage name and
click the right mouse button. A pop-up menu will appear with the following
options:
When the specification is set to AASHTO 2016, each load combination dialog will include a "User Specified" checkbox as shown below. The checkbox does not appear if the specification is set to AASHTO 2015. 
If User Specified is checked, all of the load factor fields can be edited and if unchecked all of the load factor fields are read only. When a new load combination is created the box is unchecked by default. If user edits are made to the load factors with the specification set to AASHTO 2016, they will be retained if the specification is changed back to AASHTO 2015. |
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| OK | Press this button to accept all changes and exit the command. | ||||
| Cancel | Select this button to exit the command without saving changes. |
Pedestrian Load Group:
Pedestrian loads are used by LEAP Bridge Steel as live loads per Article 3.6.1.6 of the AASHTO LRFD Bridge Specification. Since vehicle live loads currently occupy the entire deck width in LEAP Bridge Steel, the pedestrian load cannot be used concurrently with vehicle loads. LEAP Bridge Steel will prevent adding a pedestrian load to a load combination that already has a vehicle load added.
Once a pedestrian load has been added as described above the dialog shown below will appear after double-clicking the entry. Note that before a pedestrian load can be added at least one sidewalk must be defined. LEAP Bridge Steel uses the sidewalk as the path for the pedestrian load. Multiple pedestrian loads can be defined for different sidewalk locations.
| Setting | Description |
|---|---|
| Load Name | Enter the name to be used for the pedestrian load case. You can overwrite the system generated default name. |
| Pedestrian Live Load | Enter the intensity of the pedestrian load in kips/ft (KN/m). The entered load will be combined with the selected sidewalk width to get the patch loading the is used by the live lad analysis process. |
| Sidewalk(s) | The list will show a list of available sidewalks that have been entered in the Appurtenance Location command. |