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The main function for insertion of stirrups into a beam assumes that the stirrups are distributed regularly along the beam. Sometimes it may be necessary to increase or reduce the distance between stirrups.
The user may define spans (zones) on the beam. In addition, each span may consists of several parts (intervals). The distance between stirrups in each part may be different. The procedure to define a new zone is described in chapter Editing the distance between stirrups.
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List of defined spans |
The list shows all the defined spans. |
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[New span] |
This button adds a new span to the beam. Sum of span lengths must be equal to the total beam length. Before a new span can be inserted, the length of current one (or ones) must be reduced to make room for the new span. |
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[Delete span] |
This button deletes the selected span. |
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Span number |
Shows span number. |
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Length |
Defines the length of the span. We repeat that the sum of span lengths must be equal to the total beam length. Before a new span can be inserted, the length of current one (or ones) must be reduced to make room for the new span. |
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Diameter |
Specifies the diameter of stirrup used. It is possible to have different diameter in each span. |
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Distance |
Defines the distance between adjacent stirrups. |
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Distance real |
Recalculates the distance between stirrups so that the stirrups fit into the span. |
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Type |
It is possible to use single, double or triple stirrups. Single: just one stirrup is in each "stirrup row". Double: two stirrups just next to each other are in each "stirrup row". Triple: three stirrups just next to each other are in each "stirrup row". |
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Distance to begin |
Defines a free space without any stirrups at the beginning of the span. |
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Distance to end |
Defines a free space without any stirrups at the end of the span. This item is only accessible if option "Symmetrical stirrups" is OFF. |
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Input type |
Numbers + distance The stirrup distribution is defined by means of number of stirrups per the part and the distance between two adjacent stirrups. Numbers + total distance The stirrup distribution is defined by means of number of stirrups per the part and the distance between the first and last stirrup. Distance + total distance The stirrup distribution is defined by means of the distance between two adjacent stirrups and the distance between the first and last stirrup. |
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Numbers |
Defines or shows the number of stirrups per the part. |
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Diameter |
Specifies the diameters of the stirrup. It is possible to have different diameter in each part. |
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Distance |
Defines or shows the distance between two adjacent stirrups. |
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Total distance |
Defines or shows the distance between the first and last stirrup. |
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Type |
Defines the arrangement of stirrups: single, double, triple. |
If option Symmetrical stirrups is OFF, the user must define parts of span at the beginning and at the end of the span.
Example 1
Let’s assume that the following Minimum stirrup reinforcement and Additional stirrup reinforcement are defined in the Stirrup zones dialogue.
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Span no. |
Diameter |
Distance |
Type |
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1 |
8 |
300 |
single |
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Number |
Diameter |
Distance |
Total Distance |
Type |
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3 |
8 |
75 |
200 (150+50) |
single |
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5 |
8 |
100 |
500 |
single |
Example 2
The stirrups may be doubled in one section. The distance between stirrups is then measured between the centres of gravity of doubled stirrups.
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Number |
Diameter |
Distance |
Total Distance |
Type |
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3 |
8 |
75 |
200 (150+50) |
double |
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5 |
8 |
100 |
500 |
single |
