After defining the dimensions for the transversal reinforcement in a ground beam, click Next. The following dialog displays:
The following parameters are available:
- Reinforcement diameter
- Steel grade
- Reinforcement cover.
For the first ground beam type (the type is selected on the Ground Beam - Geometry tab), you can select the Anti-shrinkage reinforcement option. If this option is selected, then, while generating the transversal reinforcement, anti-shrinkage reinforcement is created and placed at the middle of the beam section (two longitudinal bars + pins are generated and the spacing is the same as it is for stirrups).
Options in the lower part of the dialog are used to specify parameters of stirrup distribution over the span length. The following methods of stirrup distribution in the span are available (similarly as for the distribution of stirrups in the RC beam):
- Constant stirrup spacing; if this method is selected, then stirrups are distributed along the length of a ground beam with a constant spacing defined in the s edit field; the distribution of stirrups are notated as n * s, where n denotes a number of stirrups, while s - a stirrup spacing.
- Three zones of stirrup distribution; if this method is selected, then three zones of stirrup reinforcement are defined along the span length (a stirrup spacing within each zone is constant); the stirrup distribution can be notated as n1 * s1 + n2 * s2 + n3 * s3, where n1, n2, n3 denote a number of stirrups in 1 st , 2 nd and 3 rd distribution zone, while s1, s2, s3 are stirrup spacings in the respective zones; lengths of the first and third distribution zones are determined in the edit fields under the schematic drawing of a span (see the drawing below).
Additionally, it is possible to define a stirrup spacing near the supports for the outermost supports of a beam.
After defining the transversal reinforcement (stirrups) parameters and clicking Next, the Ground Beam - Reinforcement dialog displays.