+ Rod r;
+ Spanner *sp = dynamic_cast<Spanner *> (me);
+
+
+ System *root = get_root_system (me);
+ vector<Item*> cols (root->broken_col_range (sp->get_bound (LEFT)->get_column (),
+ sp->get_bound (LEFT)->get_column ()));
+
+ if (cols.size () )
+ {
+ Rod r ;
+ r.item_drul_[LEFT] = sp->get_bound (LEFT);
+ r.item_drul_[RIGHT] =cols[0];
+ r.distance_ = robust_scm2double (num_length, 0);
+ r.add_to_cols ();
+
+ r.item_drul_[LEFT] = cols.back ();
+ r.item_drul_[RIGHT] = sp->get_bound (RIGHT);
+ r.add_to_cols ();
+ }
+