9. Holes — Large Holes (i.e.for sink holes in heavy glass) must be at least 4” from any edge. Fixture Holes should be at least 3” from any edge or sink hole and 2” away from any other hole. Hole Diameters must be at least as wide as the glass is thick (i.e. 3/4” glass requires a minimum of 3/4” diameter holes.) See Diagram A