Index: drc_query.conf
===================================================================
--- drc_query.conf	(revision 30391)
+++ drc_query.conf	(revision 30392)
@@ -29,6 +29,14 @@
 						legacy = design/min_slk
 						desc = {Minimum silk object width; anything thinner than this value is a violation}
 					}
+
+
+					ha:min_ring {
+						type = coord
+						default = 0mm
+						legacy = design/min_ring
+						desc = {Minimum ring thickness of padstacks }
+					}
 				}
 
 				li:rules {
@@ -97,6 +105,13 @@
 						query = { (@.bbox.x2 < 0) || (@.bbox.y2 < 0) || (@.bbox.x1 > $dwg_area_x) || (@.bbox.y1 > $dwg_area_y) }
 					}
 
+					ha:min_ring {
+						type = padstack ring too thin
+						title = Ring of a padstack ofbject is too thin
+						desc = The smallest neck of the ring is thinner than the required value - the ring may break during drilling or erode away during etching.
+						query = { pstkring(@, $min_ring) > 0 }
+					}
+
 				}
 			}
 		}