Table 4. Maximum Spacing of Supporting Members (Wales, Ties,
Stringers, and 4- x 4-Inch and Larger Shores)
Supporting Member Size (in Inches)
Uniform
Load
Single Members
Double Members
(lb/lin ft)
2x4
2x6
3x6
4x4
4x6
2x4
2x6
3x6
4x4
4x6
100
60
95
120
92
131
85
126
143
111
156
125
54
85
110
82
124
76
119
135
105
147
150
49
77
100
75
118
70
110
129
100
141
175
45
72
93
70
110
64
102
124
96
135
200
42
67
87
65
102
60
95
120
92
131
225
40
63
82
61
97
57
89
116
87
127
250
38
60
77
58
92
54
85
109
82
124
275
36
57
74
55
87
51
81
104
78
121
300
35
55
71
53
84
49
77
100
75
118
350
32
50
65
49
77
46
72
93
70
110
400
30
47
61
46
72
43
67
87
65
102
450
28
44
58
43
68
40
63
82
61
97
500
27
41
55
41
65
38
60
77
58
92
600
24
38
50
37
59
35
55
71
53
84
700
22
36
46
35
55
32
51
65
49
77
800
21
33
43
32
51
30
47
61
46
72
900
20
31
41
30
48
28
44
58
43
68
1,000
19
30
38
29
46
27
43
55
41
65
1,200
17
27
35
27
42
25
39
50
38
59
1,400
16
25
33
25
39
23
36
46
35
55
1,600
15
23
31
23
36
21
34
43
33
51
1,800
14
22
29
22
34
20
32
41
31
48
2,000
13
21
27
21
32
19
30
39
29
46
2,200
13
20
26
20
31
18
29
37
28
44
2,400
12
19
25
19
30
17
27
36
27
42
2,600
12
19
24
18
28
17
26
34
26
40
2,800
11
18
23
17
27
16
25
33
25
39
3,000
11
17
22
17
26
15
24
32
24
38
3,400
10
16
21
16
25
14
23
30
22
35
3,800
10
15
20
15
23
14
21
28
21
33
4,500
9
14
18
13
21
12
20
25
19
30
17
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