The document discusses loading calculations for different shelf configurations. It calculates the average load per vertical board for single shelves with increasing numbers of shelves and weight. Adding more shelves or stacking shelves increases the average load carried by each vertical board.

1. 我想買櫃子
可是書很多又很重

2. Single Cell
Loading : 25Kg
25/ 2 = 12.5Kg 25/ 2 = 12.5Kg
Ground

3. Single Cell plus one plus one plus one
Loading : 25x4 = 100Kg
單一垂直層板平均負載
100/ 5 =20 Kg
Ground

4. Single Cell plus one plus one plus one
and stack it once
Loading : 25x4 = 100Kg
Loading : 25x4 = 100Kg
100/ 5 =20 Kg
100/ 5 =20 Kg
+ 上層負載20Kg
= 40 Kg
(每個垂直層板負載) Ground

5. finally …
Weight : 25x4 = 100Kg
單一垂直層板平均負載
100/ 5 =20 Kg Weight : 25x4 = 100Kg
(100 + 100 )/ 5
= 40 Kg Weight : 25x4 = 100Kg
(100 + 100 +100) / 5
= 60 Kg Weight : 25x4 = 100Kg
(100 + 100 + 100+100)
/5= 80 Kg Ground