The four-legged and five-legged stirrup options are a modified version of the standard four and five-legged Section Detailing routines. The stirrup options are designed to produce a closed bar detail automatically, complete with the necessary splice. A “stirrup” may otherwise be known in different countries as a “tie”, “ligature”, "link" or “fitment".
The following description of the face indication process uses the four-legged stirrup as an example:
Select the Four-Legged Stirrup icon from the Bar Type tool box.
With a data point, indicate the four faces adjacent to which the stirrup is to be placed. The prompts "Select Face 1 / Reset", "Select Face 2 / Reject", … are displayed as the various faces are selected.
When all four faces are identified and highlighted, the preliminary bar is displayed dynamically (as shown below) and the prompt changes to "Indicate Side / Reject Last Face". Note the splice is placed automatically between faces one and four. This is important to remember on those occasions where the actual location of the splice is critical. In our example, face one is the left vertical face, with faces indicated in a clockwise direction. As with all other Section Detailing options, the cursor location determines the side of the faces on which the reinforcement is drawn. The first indicated "side" point defines the side for faces one and two (again highlighted by small indicator circles):
When the first data point is finalized, the prompt changes to "Indicate Next Side Point / Reset". A second (and final) data point confirms the position of the remaining two legs. The circles are removed and dynamic placement is halted:
If placement of the stirrup is found to be incorrect after the final data point is issued, the bar can be deleted immediately by selecting the Abort icon (that appears in the expanded bar placement tool box). Alternatively, the Re-Indicate Faces icon can be selected, in which case the bar is erased and the indication process begins again.
The initial splice type appearing on the stirrup is set according to the Splice option at the bottom of the Main Bar Defaults dialog (refer Chapter 3). However, as discussed later in this Chapter, the splice type can be changed dynamically at any stage in the Main Bar Attributes dialog box.