Move to the right across the row to the column headed by the sheathing thickness
being used. The intersecting number is the maximum stud spacing (in inches).
NOTE: All plywood sheathing problems and practice exercise problems use the strong-
way column in Table 2.
EXAMPLE:
Determine the maximum stud spacing (in inches) if the maximum concrete pressure is
320 psf and the board sheathing thickness is 1 inch.
18 inches
Table 1. Maximum Stud or Joist Spacing for Support of Board Sheathing
Maximum
Nominal Thickness of Surfaced Boards
Concrete
Pressure (psf)
1˝
1 1/4˝
1 1/2˝
2˝
75
30
37
44
50
100
28
34
41
47
125
26
33
39
44
150
25
31
37
42
175
24
30
35
41
200
23
29
34
39
300
21
26
31
35
400
18
24
29
33
500
16
22
27
31
600
15
20
25
30
700
14
18
23
28
800
13
17
22
26
900
12
16
20
24
1,000
12
15
19
23
1,100
11
15
18
22
1,200
11
14
18
21
1,400
10
13
16
20
1,600
9
12
15
18
1,800
9
12
14
17
2,000
8
11
14
16
2,200
8
10
13
16
2,400
7
10
12
15
2,600
7
10
12
14
2,800
7
9
12
14
3,000
7
9
11
13
11
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