Vierkant

Breedte	gewicht
mm	kg/mtr
3	0,071
4	0,130
5	0,200
6	0,300
8	0,520
10	0,800
12	1,200
14	1,600
15	1,800
16	2,100
18	2,600
20	3,200
22	3,900
25	5,000
30	7,200
35	9,800
40	12,800
45	15,900
50	20,000
60	28,800
65	33,200
70	38,500
80	50,300
90	63,600
100	78,500
120	113,000