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

42 Chapter Four
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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
Net
Area,
in. 2
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
x—x
X-X axis
y—y
Y-Y axis
I x
, in. 4 S x
, in. 3 I y
, in. 4 S y
, in. 3
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 4-1 Properties of S4S Dry Lumber, Moisture Less Than 19%
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