Stirrups Tab
The Stirrups tab is used to define the vertical reinforcement. The stirrup pattern can be modified for the selected beam in the selected span. To copy the stirrup pattern to a different beam use Copy to. This dialog features an Auto Design button, which will generate a stirrup schedule to satisfy the required reinforcement. The required and provided shear reinforcement can be viewed by clicking Graphs. The Make Symmetrical button allows the user to specify reinforcement for only one half of the beam starting from the left end, and mirror the reinforcement from the left side to the right-hand side of the beam, saving time and reducing input errors.
Stirrup Terms
| Setting | Description |
|---|---|
| Stirrup Size |
Select the bar size from the list. The bar size name refers to a rebar material definition loaded from the Rebar Library. Rebar material definitions include specification of: unit type, yield stress (fy), ultimate stress (fu), modulus of elasticity, deformed diameter, and area. The Rebar Library can be found under the Libraries menu. Rebar material definitions must be added and deleted from the Rebar Library. |
| Number of Legs |
Enter the number of stirrup legs needed. |
| Stirrup Area |
Displays the total area of stirrup legs for this row if a stirrup size is used. Enter the total area of stirrup legs for this row for an "unknown" size. |
| Stirrup Spacing |
Enter the spacing of the stirrups. |
| Exten to Deck |
If the reinforcing in this zone extends to deck and should be considered as interface/horizontal shear, select the check mark symbol. |
| Start/End Distances |
Stirrup starting and ending locations are to be specified with respect to the left end of the precast beam. |
| Spacing Increment |
This is the stirrup spacing increment that will be used in an attempt to compute the required stirrup schedule. |
Options to Save, Load and Save As
The bottom portion of the Stirrups tab has buttons titled Delete, Save, Load and Save As. Precast/Prestressed Girder now allows you to save/load the stirrup layout rather than re-input this frequently used information across different files. The concept supports the notion that a user may define a stirrup pattern once for a particular data file, but wishes to save this information for re-use in a different data file. Standard stirrup rebar schedules can easily be coded by one user in an office, and used by all other engineers in the same office across projects. To use this functionality you must specify a name in the field for Save As, and click the Save As button to save the existing information from the grid above. From that point forward you can simply call or load that particular stirrup schedule by selecting it from the drop down and clicking on the Load button.