| Kern |
Location of the lower and upper kern points measured from the bottom of the beam. These points define an upper and lower boundary where once the prestress force is introduced inside the kern points, it does not produce tension anywhere in the section. It is helpful to know these values when you are manually inputting the strand pattern. |
| Total Strands |
This is the total number of strands in the beam. It is obtained by adding up the number of strands used in each row. |
| Ycg |
Centroid of strands at the end and midspan of the beam measured from the bottom of the beam. If there are no draped strands, the two values are the same. |
| Type |
The type of pattern for the strands, either draped or straight. Available based upon the strand information specified on the Materials tab, under Prestressing Tendon. |
| End (max) |
Select the height of a layer at the beam end. The number of layers and location measured from the bottom of the beam are defined in the Section Beam Library Template. The number in parenthesis is the defined maximum number of strands allowed at this height in the beam template. |
| Middle |
Input the height of the strand layer at midspan. It is only available if the type is set to Draped and is usually lower than the height at the ends. |
| # of Strands (max available) |
The number of strands available in a layer. The Add button allows you to add remaining available strands per layer. |
| Auto Design Button |
Clicking this button automatically generates an optimized strand pattern. The algorithm for generating the pattern depends on the type of pattern (straight or draped), which you specified in the materials tab or in the Strand Data. |
| Debond/Pull% Button |
Clicking this button opens the Debonding Pattern screen where you specify the strand debonding. |
| Reset Pattern Button |
Use this button to reset the number of strands equal to zero. |
| Increment Draping |
This button is enabled only for draped patterns. Clicking this button will raise the topmost group of draped strands by one row. |
| Decrement Draping |
This button is enabled only for draped patterns. Clicking this button will lower the lowermost group of draped strands by one row. |
| Strand Pattern Input Grid |
The strand pattern layout can be entered directly into the grid by typing in or selecting from the appropriate listboxes in each cell of a particular row. The grid features the first level of data validation, and any incorrect entries are flagged for the user's attention by turning red. The following menu items appear on the menu that displays when the user right clicks on the first column in the grid.
- Insert Row: A new row will be inserted in the grid after the selected row.
- Copy Row: This action will insert a copy of the active row in the grid.
- Delete Row: This action will delete the active row from the grid.
- Copy Text: Copies the text from all the cells in the active row, and places it on the Clipboard for subsequent use.
- Paste Text: Places the text from the Clipboard in the active row.
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| Modify Button |
To modify any value in the pattern, highlight the row to modify in the list, make the appropriate changes, and click Modify. |
| Delete Button |
Delete any row of strands by highlighting the row and clicking Delete. |
| Copy to Button |
If a strand pattern already exists, then the program prompts you with a message asking if you would like to overwrite the existing pattern. |
