Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

216 Chapter Nine
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Nominal
Size, in.
1 × 4
1 × 6
1 × 8
1 × 10
1 × 12
2 × 4
2 × 6
2 × 8
2 × 10
2 × 12
3 × 4
3 × 6
3 × 8
3 × 10
3 × 12
4 × 4
4 × 6
4 × 8
4 × 10
4 × 12
Actual Size,
Thickness ë
Width, in.
¾ × 3½
¾ × 5½
¾ × 7¼
¾ × 9¼
¾ × 11¼
1½ × 3½
1½ × 5½
1½ × 7¼
1½ × 9¼
1½ × 11¼
2½ × 3½
2½ × 5½
2½ × 7¼
2½ × 9¼
2½ × 11¼
3½ × 3½
3½ × 5½
3½ × 7¼
3½ × 9¼
3½ × 11¼
in. 2 I x
, in. 4 S x
, in. 3 I y
, in. 4 S y
, in. 3
x x
x x
Net
Area
X-X axis
Y-Y axis
2.62
4.12
5.43
6.93
8.43
5.25
8.25
10.87
13.87
16.87
8.75
13.75
18.12
23.12
28.12
12.25
19.25
25.38
32.37
39.37
2.68
10.40
23.82
49.47
88.99
5.36
20.80
47.63
98.93
177.97
8.93
34.66
79.39
164.88
296.63
12.50
48.53
111.14
230.84
415.28
1.53
3.78
6.57
10.70
15.82
3.06
7.56
13.14
21.39
31.64
5.10
12.60
21.90
35.65
52.73
7.15
17.65
30.66
49.91
73.83
0.123
0.193
0.255
0.325
0.396
0.984
1.547
2.039
2.603
3.164
4.56
7.16
9.44
12.04
14.65
12.51
19.65
25.90
33.05
40.20
0.328
0.516
0.680
0.867
1.055
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1.313
2.063
2.719
3.469
4.219
3.65
5.73
7.55
9.64
11.72
7.15
11.23
14.80
18.89
22.97
5 × 5 4½ × 4½ 20.25 34.17 15.19 34.17 15.19
6 × 6
6 × 8
6 × 10
6 × 12
8 × 8
8 × 10
8 × 12
10 × 10
10 × 12
5½ × 5½
5½ × 7½
5½ × 9½
5½ × 11½
7½ × 7½
7½ × 9½
7½ × 11½
9½ × 9½
9½ × 11½
30.25
41.25
52.25
63.25
56.25
71.25
86.25
90.25
109.25
76.25
193.35
393.96
697.06
263.7
535.9
950.5
678.8
1204.0
27.73
51.56
82.73
121.2
70.31
112.8
165.3
142.9
209.4
76.26
103.98
131.71
159.44
263.67
333.98
404.29
678.75
821.65
27.73
37.81
47.90
57.98
70.31
89.06
107.81
142.90
173.98
12 × 12 11½ × 11½ 132.25 1457.5 253.5 1,457.50 253.48
TABLE 9-1 Properties of S4S Dry Lumber, Moisture < 19%
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