 			pageSetup:[]
 		}
 		obj = extend obj,@_.xmlobj.worksheet
-		dim = obj.dimension[0].$
-		dim.ref = Utils.toAddr(@_.top, @_.left)+":"+Utils.toAddr(@_.bottom, @_.right)
+		obj.dimension[0].$.ref = @_.dimension.toString()
 		formatPtr = obj.sheetFormatPr[0].$
 		formatPtr.defaultColWidth = @defaultColWidth
 		formatPtr.defaultRowHeight = @defaultRowHeight

		"name":
			get: -> @_.name
		"top":
			get: -> @_.top
		"left":
			get: -> @_.left
		"bottom":
			get: -> @_.bottom
		"right":
			get: -> @_.right


	getRow: (r)->

		@_.id = parseInt id
		@_.rid = parseInt rid
		@_.name = name
		@_.dimension = new BlockRange(ws.dimension[0].$.ref)
		@defaultColWidth = (parseFloat ws.sheetFormatPr[0].$.defaultColWidth) || 12
		@defaultRowHeight = (parseFloat ws.sheetFormatPr[0].$.defaultRowHeight) || 20

