What bolt patterns can be specified in Unwedge?

Around the perimeter of a tunnel (Perimeter Support view) you can specify any number of different bolt patterns, with different lengths, properties, etc.  You can have multiple patterns of different lengths in different regions of the tunnel perimeter.

Note that the bolts have to intersect the wedge in order to provide support, so for very small wedges that fall between the bolt spacing, no support is provided.  In these cases a spot bolt may be useful.

Two pages that may be useful are Perimeter Support  Designer and Perimeter Support:  Add Bolt Pattern from the Online Help.

For excavation ends (End Support view) only a single bolt pattern can be specified.  See End Support Designer and End Support:  Add Bolt Pattern for more details.