d

D

W

S

E

 

W=Safe

d=

D=

W=

S=

e=

Weight

Working

each/kg

Load
tons cwt

0.49√M
in.

0.56√M
in.

0.95√M
in.

1.81√M
in.

1.12√M
in.

5
10
15
1 10
2 0
3 0
3 15
5 0
6 0
7 0
9 10
11 5
13 0
14 5
16 5
 

1/4
3/8
1/2
5/8
3/4
7/8
1
1 1/8
1 1/4
1 3/8
1 1/2
1 5/8
1 3/4
1 7/8
2

3/8
1/2
5/8
3/4
7/8
1
1 1/8
1 1/4
1 3/8
1 1/2
1 3/4
1 7/8
2
2 1/8
2 1/4
 

1/2
3/4
1 1/8
1 1/4
1 1/2
1 3/4
2
2 1/8
2 3/8
2 5/8
2 3/4
3
3 1/4
3 5/8
3 7/8

1
1 1/2
2 1/8
2 1/2
2 7/8
3 1/4
3 3/4
4 1/8
4 1/2
5
5 3/8
5 3/4
6 3/8
7
7 3/8

3/4
1
1 1/4
1 1/2
1 3/4
2
2 1/4
2 1/2
2 3/4
3
3 1/2
3 3/4
4
4 1/4
4 1/2

0.11
0.17
0.35
0.66
1.02
1.57
2.3
3.2
4.3
5.4
6.8
8.7
11.0
14.3
20.0