wire_load("top") {
        resistance : res ;
        capacitance : cap ;
        area : 1 ; /* i.e. 1 sq micron */
        slope : length_top * .5 ;
        fanout_length(1,2500); /* length          */
        fanout_length(2,3750); /* length * 1.5    */
        fanout_length(3,5000); /* length * 2      */
        fanout_length(4,5625); /* length * 2.5    */
        fanout_length(5,6250); /* length * 2.5    */
        fanout_length(6,6875); /* length * 2.75   */
        fanout_length(7,7500); /* length * 3      */
        }

        wire_load("10k") {
        resistance : res ;
        capacitance : cap ;
        area : 1 ;
        slope : length_10k * .5 ;
        fanout_length(1,900);  /* length          */
        fanout_length(2,1350); /* length * 1.5    */
        fanout_length(3,1800); /* length * 2      */
        fanout_length(4,2025); /* length * 2.5    */
        fanout_length(5,2250); /* length * 2.5    */
        fanout_length(6,2475); /* length * 2.75   */
        fanout_length(7,2700); /* length * 3      */
        }

        wire_load("5k") {
        resistance : res ;
        capacitance : cap ;
        area : 1 ;
        slope : length_5k * .5 ;
        fanout_length(1,639);  /* length          */
        fanout_length(2,959);  /* length * 1.5    */
        fanout_length(3,1278); /* length * 2      */
        fanout_length(4,1439); /* length * 2.5    */
        fanout_length(5,1598); /* length * 2.5    */
        fanout_length(6,1757); /* length * 2.75   */
        fanout_length(7,1917); /* length * 3      */
        }

/* define how the wire loads are selected based on total circuit area */
   wire_load_selection (foo) {
   wire_load_from_area (   0,  3000000,  "5k");
   wire_load_from_area (3000000, 7000000, "10k");
   }

   default_wire_load_mode : enclosed ;
   default_wire_load : "top" ;
   default_wire_load_selection : "foo" ;
/* end of wire_load calculation */