We depends on the gate count to choose the wire load model. As you know, the wire load model is a model which is based on the gate count sizes.
For a bigger size design, the wire_load_table will have bigger fanout length, vice versa.
For example,
wire_load_table("small_design") {
fanout_length( 1, 3);
fanout_length( 2, 11);
fanout_length( 3, 14);
fanout_length( 4, 17);
wire_load_table("big_design") {
fanout_length( 1, 100);
fanout_length( 2, 200);
fanout_length( 3, 280);
fanout_length( 4, 399);
You should be able to get the data from your foundary. They normally provide this data based on their previous design statistics.
You can set_wire_load_model and set_wire_load_mode in DC, and you can refer to the man page for more details.
Hope this helps!