In a house of 100m*13m,if 4 tier cages are installed,39 units of cage per line,the height of side wall should be 4.0m,and total birds quantity is 37400;if 5 tier cages are installed,19 units of cage per line,the height of side wall should be 4.5m,and total birds quantity is 46800;is 6tier cages are installed,39 units of cage per line,the height of side wall should be 5.0m,and total birds quantity is 56160.