| 別表第１（第三条関係） 座屈係数 |
|
| 降伏点又は耐力 |
|
降伏点又は耐力 |
| (1) 245以下 |
|
(2) 245超～325以下 |
| (3) 325超～365以下 |
|
(4) 365超～460以下 |
| (5) 460超～575以下 |
|
(6) 575超～620以下 |
| (7) 620超～685以下 |
|
単位：Ｎ／mm2 |
|
|
| 備考 |
| １ |
これらの表において、λは、有効細長比を表すものとする。 |
| ２ |
これらの表において、座屈係数が上下２段に示されている場合においては、上段の数値は管厚が外径の６分の１以下の鋼管以外の鋼材の座屈係数を、下段の数値は管厚が外径の６分の１以下の鋼管の座屈係数を表すものとする。 |
|
|
| (1) |
降伏点又は耐力が245ニュートン毎平方ミリメートル以下の鋼材の許容座屈応力の値の計算に用いる座屈係数 |
|
|
λ
|
０
|
１
|
２
|
３
|
４
|
５
|
６
|
７
|
８
|
９
|
|
20
|
1.00
|
1.00
|
1.00
|
1.00
|
1.01
|
1.01
|
1.01
|
1.02
|
1.02
|
1.03
|
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
|
30
|
1.03
|
1.04
|
1.04
|
1.05
|
1.05
|
1.06
|
1.06
|
1.07
|
1.08
|
1.08
|
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.01
|
1.01
|
|
40
|
1.09
|
1.10
|
1.10
|
1.11
|
1.12
|
1.12
|
1.13
|
1.14
|
1.14
|
1.15
|
|
1.02
|
1.02
|
1.03
|
1.03
|
1.04
|
1.04
|
1.05
|
1.05
|
1.06
|
1.06
|
|
50
|
1.16
|
1.17
|
1.18
|
1.19
|
1.19
|
1.20
|
1.21
|
1.22
|
1.23
|
1.24
|
|
1.07
|
1.08
|
1.08
|
1.09
|
1.10
|
1.10
|
1.11
|
1.12
|
1.12
|
1.13
|
|
60
|
1.25
|
1.26
|
1.27
|
1.28
|
1.29
|
1.31
|
1.32
|
1.33
|
1.34
|
1.35
|
|
1.14
|
1.15
|
1.16
|
1.16
|
1.17
|
1.18
|
1.19
|
1.2０
|
1.21
|
1.22
|
|
70
|
1.37
|
1.38
|
1.39
|
1.41
|
1.42
|
1.43
|
1.45
|
1.46
|
1.48
|
1.49
|
|
1.23
|
1.24
|
1.25
|
1.26
|
1.27
|
1.29
|
1.30
|
1.31
|
1.32
|
1.33
|
|
80
|
1.51
|
1.52
|
1.54
|
1.55
|
1.57
|
1.59
|
1.60
|
1.62
|
1.64
|
1.66
|
|
1.35
|
1.36
|
1.37
|
1.39
|
1.4０
|
1.42
|
1.43
|
1.45
|
1.46
|
1.48
|
|
90
|
1.68
|
1.69
|
1.71
|
1.73
|
1.75
|
1.77
|
1.79
|
1.81
|
1.83
|
1.85
|
|
1.50
|
1.51
|
1.53
|
1.55
|
1.56
|
1.58
|
1.61
|
1.64
|
1.68
|
1.71
|
|
100
|
1.87
|
1.89
|
1.91
|
1.94
|
1.96
|
1.98
|
2.00
|
2.03
|
2.05
|
2.07
|
|
1.75
|
1.78
|
1.82
|
1.85
|
1.89
|
1.93
|
1.96
|
2.00
|
2.04
|
|
110
|
2.11
|
2.15
|
2.19
|
2.23
|
2.27
|
2.31
|
2.35
|
2.39
|
2.43
|
2.47
|
|
120
|
2.51
|
2.56
|
2.60
|
2.64
|
2.69
|
2.73
|
2.77
|
2.82
|
2.86
|
2.91
|
|
130
|
2.95
|
3.00
|
3.04
|
3.09
|
3.14
|
3.18
|
3.23
|
3.28
|
3.33
|
3.37
|
|
140
|
3.42
|
3.47
|
3.52
|
3.57
|
3.62
|
3.67
|
3.72
|
3.77
|
3.83
|
3.88
|
|
150
|
3.93
|
3.98
|
4.03
|
4.09
|
4.14
|
4.20
|
4.25
|
4.3
|
4.36
|
4.42
|
|
160
|
4.47
|
4.53
|
4.58
|
4.64
|
4.7
|
4.75
|
4.81
|
4.87
|
4.93
|
4.99
|
|
170
|
5.05
|
5.11
|
5.17
|
5.23
|
5.29
|
5.35
|
5.41
|
5.47
|
5.53
|
5.60
|
|
180
|
5.66
|
5.72
|
5.78
|
5.85
|
5.91
|
5.98
|
6.04
|
6.11
|
6.17
|
6.24
|
|
190
|
6.30
|
6.37
|
6.44
|
6.51
|
6.57
|
6.64
|
6.71
|
6.78
|
6.85
|
6.92
|
|
200
|
6.99
|
|
|
|
|
|
|
|
|
|
|
|
|
| (2) |
降伏点又は耐力が245ニュートン毎平方ミリメートルを超え325ニュートン毎平方ミリメートル以下の鋼材の許容座屈応力の値の計算に用いる座屈係数 |
|
|
λ
|
０
|
１
|
２
|
３
|
４
|
５
|
６
|
７
|
８
|
９
|
|
20
|
1.00
|
1.00
|
1.00
|
1.01
|
1.01
|
1.02
|
1.02
|
1.03
|
1.03
|
1.04
|
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
|
30
|
1.04
|
1.05
|
1.05
|
1.06
|
1.07
|
1.07
|
1.08
|
1.09
|
1.09
|
1.10
|
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.01
|
1.01
|
1.02
|
1.02
|
1.03
|
|
40
|
1.11
|
1.12
|
1.13
|
1.13
|
1.14
|
1.15
|
1.16
|
1.17
|
1.18
|
1.19
|
|
1.03
|
1.04
|
1.04
|
1.05
|
1.06
|
1.06
|
1.07
|
1.08
|
1.08
|
1.09
|
|
50
|
1.20
|
1.21
|
1.22
|
1.23
|
1.24
|
1.25
|
1.27
|
1.28
|
1.29
|
1.30
|
|
1.10
|
1.11
|
1.12
|
1.13
|
1.13
|
1.14
|
1.15
|
1.16
|
1.17
|
1.18
|
|
60
|
1.32
|
1.33
|
1.35
|
1.36
|
1.37
|
1.39
|
1.41
|
1.42
|
1.44
|
1.45
|
|
1.19
|
1.20
|
1.22
|
1.23
|
1.24
|
1.25
|
1.27
|
1.28
|
1.29
|
1.31
|
|
70
|
1.47
|
1.49
|
1.51
|
1.52
|
1.54
|
1.56
|
1.58
|
1.60
|
1.62
|
1.64
|
|
1.32
|
1.34
|
1.35
|
1.37
|
1.38
|
1.40
|
1.42
|
1.43
|
1.45
|
1.47
|
|
80
|
1.66
|
1.68
|
1.70
|
1.72
|
1.75
|
1.77
|
1.79
|
1.82
|
1.84
|
1.86
|
|
1.49
|
1.52
|
1.56
|
1.60
|
1.63
|
1.67
|
1.71
|
1.75
|
1.79
|
1.84
|
|
90
|
1.89
|
1.92
|
1.96
|
2.00
|
2.05
|
2.09
|
2.14
|
2.18
|
2.22
|
2.27
|
|
1.88
|
|
100
|
2.32
|
2.36
|
2.41
|
2.46
|
2.51
|
2.55
|
2.60
|
2.65
|
2.70
|
2.75
|
|
110
|
2.80
|
2.85
|
2.91
|
2.96
|
3.01
|
3.06
|
3.12
|
3.17
|
3.23
|
3.28
|
|
120
|
3.34
|
3.39
|
3.45
|
3.50
|
3.56
|
3.62
|
3.68
|
3.74
|
3.80
|
3.86
|
|
130
|
3.92
|
3.98
|
4.04
|
4.10
|
4.16
|
4.22
|
4.28
|
4.35
|
4.41
|
4.48
|
|
140
|
4.54
|
4.61
|
4.67
|
4.74
|
4.80
|
4.87
|
4.94
|
5.01
|
5.07
|
5.14
|
|
150
|
5.21
|
5.28
|
5.35
|
5.42
|
5.49
|
5.57
|
5.64
|
5.71
|
5.78
|
5.86
|
|
160
|
5.93
|
6.01
|
6.08
|
6.16
|
6.23
|
6.31
|
6.38
|
6.46
|
6.54
|
6.62
|
|
170
|
6.70
|
6.77
|
6.85
|
6.93
|
7.01
|
7.09
|
7.18
|
7.26
|
7.34
|
7.42
|
|
180
|
7.51
|
7.59
|
7.67
|
7.76
|
7.84
|
7.93
|
8.01
|
8.10
|
8.19
|
8.28
|
|
190
|
8.36
|
8.45
|
8.54
|
8.63
|
8.72
|
8.81
|
8.90
|
8.99
|
9.08
|
9.17
|
|
200
|
9.27
|
|
|
|
|
|
|
|
|
|
|
|
|
(3)
|
降伏点又は耐力が325ニュートン毎平方ミリメートルを超え365ニュートン毎平方ミリメートル以下の鋼材の許容座屈応力の値の計算に用いる座屈係数 |
|
|
λ
|
０
|
１
|
２
|
３
|
４
|
５
|
６
|
７
|
８
|
９
|
|
20
|
1.00
|
1.00
|
1.00
|
1.01
|
1.01
|
1.02
|
1.02
|
1.03
|
1.04
|
1.04
|
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
|
30
|
1.05
|
1.05
|
1.06
|
1.07
|
1.07
|
1.08
|
1.09
|
1.10
|
1.10
|
1.11
|
|
1.00
|
1.00
|
1.00
|
1.00
|
1.01
|
1.01
|
1.02
|
1.02
|
1.03
|
1.03
|
|
40
|
1.12
|
1.13
|
1.14
|
1.15
|
1.16
|
1.17
|
1.18
|
1.19
|
1.20
|
1.21
|
|
1.04
|
1.05
|
1.05
|
1.06
|
1.07
|
1.08
|
1.08
|
1.09
|
1.10
|
1.11
|
|
50
|
1.22
|
1.23
|
1.24
|
1.26
|
1.27
|
1.28
|
1.30
|
1.31
|
1.32
|
1.34
|
|
1.12
|
1.13
|
1.14
|
1.14
|
1.16
|
1.17
|
1.18
|
1.19
|
1.20
|
1.21
|
|
60
|
1.35
|
1.37
|
1.38
|
1.40
|
1.42
|
1.43
|
1.45
|
1.47
|
1.49
|
1.51
|
|
1.22
|
1.24
|
1.25
|
1.26
|
1.28
|
1.29
|
1.31
|
1.32
|
1.34
|
1.36
|
|
70
|
1.53
|
1.55
|
1.57
|
1.59
|
1.61
|
1.63
|
1.65
|
1.67
|
1.70
|
1.72
|
|
1.37
|
1.39
|
1.41
|
1.43
|
1.44
|
1.46
|
1.50
|
1.54
|
1.58
|
1.62
|
|
80
|
1.74
|
1.77
|
1.79
|
1.82
|
1.84
|
1.88
|
1.92
|
1.97
|
2.01
|
2.06
|
|
1.67
|
1.71
|
1.75
|
1.79
|
|
90
|
2.11
|
2.15
|
2.20
|
2.25
|
2.30
|
2.35
|
2.40
|
2.45
|
2.50
|
2.55
|
|
100
|
2.60
|
2.65
|
2.71
|
2.76
|
2.81
|
2.87
|
2.92
|
2.98
|
3.03
|
3.09
|
|
110
|
3.15
|
3.21
|
3.26
|
3.32
|
3.38
|
3.44
|
3.50
|
3.56
|
3.62
|
3.68
|
|
120
|
3.75
|
3.81
|
3.87
|
3.94
|
4.00
|
4.07
|
4.13
|
4.20
|
4.26
|
4.33
|
|
130
|
4.40
|
4.46
|
4.53
|
4.60
|
4.67
|
4.74
|
4.81
|
4.88
|
4.95
|
5.03
|
|
140
|
5.10
|
5.17
|
5.25
|
5.32
|
5.40
|
5.47
|
5.55
|
5.62
|
5.70
|
5.78
|
|
150
|
5.85
|
5.93
|
6.01
|
6.09
|
6.17
|
6.25
|
6.33
|
6.41
|
6.50
|
6.58
|
|
160
|
6.66
|
6.74
|
6.83
|
6.91
|
7.00
|
7.08
|
7.17
|
7.26
|
7.34
|
7.43
|
|
170
|
7.52
|
7.61
|
7.70
|
7.79
|
7.88
|
7.97
|
8.06
|
8.15
|
8.24
|
8.34
|
|
180
|
8.43
|
8.52
|
8.62
|
8.71
|
8.81
|
8.90
|
9.00
|
9.10
|
9.20
|
9.29
|
|
190
|
9.39
|
9.49
|
9.59
|
9.69
|
9.79
|
9.89
|
10.00
|
10.10
|
10.20
|
10.30
|
|
200
|
10.41
|
|
|
|
|
|
|
|
|
|
|
|
|
(4)
|
降伏点又は耐力が365ニュートン毎平方ミリメートルを超え460ニュートン毎平方ミリメートル以下の鋼材の許容座屈応力の値の計算に用いる座屈係数
|
|
|
λ
|
０
|
１
|
２
|
３
|
４
|
５
|
６
|
７
|
８
|
９
|
|
20
|
1.00
|
1.00
|
1.01
|
1.02
|
1.02
|
1.03
|
1.03
|
1.04
|
1.05
|
1.05
|
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
|
30
|
1.06
|
1.07
|
1.07
|
1.08
|
1.09
|
1.10
|
1.11
|
1.12
|
1.13
|
1.14
|
|
1.00
|
1.00
|
1.01
|
1.01
|
1.02
|
1.03
|
1.03
|
1.04
|
1.05
|
1.05
|
|
40
|
1.15
|
1.16
|
1.17
|
1.18
|
1.19
|
1.20
|
1.22
|
1.23
|
1.24
|
1.26
|
|
1.06
|
1.07
|
1.08
|
1.09
|
1.10
|
1.11
|
1.12
|
1.13
|
1.14
|
1.15
|
|
50
|
1.27
|
1.29
|
1.30
|
1.32
|
1.33
|
1.35
|
1.37
|
1.39
|
1.40
|
1.42
|
|
1.16
|
1.17
|
1.18
|
1.20
|
1.21
|
1.22
|
1.24
|
1.25
|
1.27
|
1.29
|
|
60
|
1.44
|
1.46
|
1.48
|
1.50
|
1.53
|
1.55
|
1.57
|
1.60
|
1.62
|
1.64
|
|
1.30
|
1.32
|
1.34
|
1.36
|
1.38
|
1.40
|
1.43
|
1.47
|
1.52
|
1.56
|
|
70
|
1.67
|
1.69
|
1.72
|
1.75
|
1.80
|
1.84
|
1.89
|
1.94
|
1.99
|
2.05
|
|
1.61
|
1.65
|
1.70
|
|
80
|
2.10
|
2.15
|
2.20
|
2.26
|
2.31
|
2.37
|
2.43
|
2.48
|
2.54
|
2.60
|
|
90
|
2.66
|
2.72
|
2.78
|
2.84
|
2.90
|
2.96
|
3.02
|
3.09
|
3.15
|
3.21
|
|
100
|
3.28
|
3.34
|
3.41
|
3.48
|
3.55
|
3.62
|
3.68
|
3.75
|
3.82
|
3.90
|
|
110
|
3.97
|
4.04
|
4.11
|
4.19
|
4.26
|
4.34
|
4.41
|
4.49
|
4.57
|
4.64
|
|
120
|
4.72
|
4.80
|
4.88
|
4.96
|
5.04
|
5.12
|
5.21
|
5.29
|
5.37
|
5.46
|
|
130
|
5.54
|
5.63
|
5.71
|
5.80
|
5.89
|
5.98
|
6.06
|
6.15
|
6.24
|
6.34
|
|
140
|
6.43
|
6.52
|
6.61
|
6.71
|
6.80
|
6.89
|
6.99
|
7.09
|
7.18
|
7.28
|
|
150
|
7.38
|
7.48
|
7.58
|
7.68
|
7.78
|
7.88
|
7.98
|
8.08
|
8.19
|
8.29
|
|
160
|
8.39
|
8.50
|
8.61
|
8.71
|
8.82
|
8.93
|
9.04
|
9.14
|
9.25
|
9.37
|
|
170
|
9.48
|
9.59
|
9.70
|
9.81
|
9.93
|
10.04
|
10.16
|
10.27
|
10.39
|
10.51
|
|
180
|
10.62
|
10.74
|
10.86
|
10.98
|
11.10
|
11.22
|
11.34
|
11.47
|
11.59
|
11.71
|
|
190
|
11.84
|
11.96
|
12.09
|
12.21
|
12.34
|
12.47
|
12.60
|
12.73
|
12.86
|
12.99
|
|
200
|
13.12
|
|
|
|
|
|
|
|
|
|
|
|
|
| (5) |
降伏点又は耐力が460ニュートン毎平方ミリメートルを超え575ニュートン毎平方ミリメートル以下の鋼材の許容座屈応力の値の計算に用いる座屈係数 |
|
|
λ
|
０
|
１
|
２
|
３
|
４
|
５
|
６
|
７
|
８
|
９
|
|
20
|
1.01
|
1.01
|
1.02
|
1.02
|
1.03
|
1.04
|
1.04
|
1.05
|
1.06
|
1.07
|
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
|
30
|
1.08
|
1.08
|
1.09
|
1.10
|
1.11
|
1.12
|
1.13
|
1.14
|
1.16
|
1.17
|
|
1.01
|
1.02
|
1.02
|
1.03
|
1.04
|
1.04
|
1.05
|
1.06
|
1.07
|
1.08
|
|
40
|
1.18
|
1.19
|
1.21
|
1.22
|
1.24
|
1.25
|
1.27
|
1.29
|
1.30
|
1.32
|
|
1.09
|
1.10
|
1.11
|
1.12
|
1.13
|
1.15
|
1.16
|
1.17
|
1.19
|
1.20
|
|
50
|
1.34
|
1.36
|
1.38
|
1.40
|
1.42
|
1.44
|
1.47
|
1.49
|
1.51
|
1.54
|
|
1.22
|
1.23
|
1.25
|
1.27
|
1.29
|
1.31
|
1.33
|
1.35
|
1.38
|
1.43
|
|
60
|
1.56
|
1.59
|
1.62
|
1.64
|
1.68
|
1.73
|
1.79
|
1.84
|
1.90
|
1.95
|
|
1.48
|
1.53
|
1.58
|
1.63
|
|
70
|
2.01
|
2.07
|
2.12
|
2.18
|
2.24
|
2.31
|
2.37
|
2.43
|
2.49
|
2.56
|
|
80
|
2.62
|
2.69
|
2.76
|
2.82
|
2.89
|
2.96
|
3.03
|
3.10
|
3.17
|
3.25
|
|
90
|
3.32
|
3.39
|
3.47
|
3.55
|
3.62
|
3.70
|
3.78
|
3.86
|
3.94
|
4.02
|
|
100
|
4.10
|
4.18
|
4.26
|
4.35
|
4.43
|
4.52
|
4.61
|
4.69
|
4.78
|
4.87
|
|
110
|
4.96
|
5.05
|
5.14
|
5.23
|
5.33
|
5.42
|
5.52
|
5.61
|
5.71
|
5.80
|
|
120
|
5.90
|
6.00
|
6.10
|
6.20
|
6.30
|
6.40
|
6.51
|
6.61
|
6.72
|
6.82
|
|
130
|
6.93
|
7.03
|
7.14
|
7.25
|
7.36
|
7.47
|
7.58
|
7.69
|
7.81
|
7.92
|
|
140
|
8.03
|
8.15
|
8.26
|
8.38
|
8.50
|
8.62
|
8.74
|
8.86
|
8.98
|
9.10
|
|
150
|
9.22
|
9.35
|
9.47
|
9.59
|
9.72
|
9.85
|
9.97
|
10.10
|
10.23
|
10.36
|
|
160
|
10.49
|
10.62
|
10.76
|
10.89
|
11.02
|
11.16
|
11.29
|
11.43
|
11.57
|
11.71
|
|
170
|
11.85
|
11.99
|
12.13
|
12.27
|
12.41
|
12.55
|
12.70
|
12.84
|
12.99
|
13.13
|
|
180
|
13.28
|
13.43
|
13.58
|
13.73
|
13.88
|
14.03
|
14.18
|
14.33
|
14.49
|
14.64
|
|
190
|
14.80
|
14.95
|
15.11
|
15.27
|
15.43
|
15.59
|
15.75
|
15.91
|
16.07
|
16.23
|
|
200
|
16.40
|
|
|
|
|
|
|
|
|
|
|
|
|
| (6) |
降伏点又は耐力が575ニュートン毎平方ミリメートルを超え620ニュートン毎平方ミリメートル以下の鋼材の許容座屈応力の値の計算に用いる座屈係数 |
|
|
λ
|
０
|
１
|
２
|
３
|
４
|
５
|
６
|
７
|
８
|
９
|
|
20
|
1.01
|
1.01
|
1.02
|
1.03
|
1.03
|
1.04
|
1.05
|
1.06
|
1.06
|
1.07
|
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.01
|
|
30
|
1.08
|
1.09
|
1.10
|
1.11
|
1.12
|
1.13
|
1.14
|
1.16
|
1.17
|
1.18
|
|
1.01
|
1.02
|
1.03
|
1.04
|
1.04
|
1.05
|
1.06
|
1.07
|
1.08
|
1.09
|
|
40
|
1.20
|
1.21
|
1.22
|
1.24
|
1.26
|
1.27
|
1.29
|
1.31
|
1.33
|
1.35
|
|
1.10
|
1.11
|
1.12
|
1.14
|
1.15
|
1.16
|
1.18
|
1.19
|
1.21
|
1.23
|
|
50
|
1.37
|
1.39
|
1.41
|
1.43
|
1.46
|
1.48
|
1.51
|
1.53
|
1.56
|
1.59
|
|
1.24
|
1.26
|
1.28
|
1.30
|
1.32
|
1.34
|
1.39
|
1.44
|
1.49
|
1.54
|
|
60
|
1.61
|
1.64
|
1.70
|
1.75
|
1.81
|
1.87
|
1.93
|
1.98
|
2.04
|
2.10
|
|
1.59
|
|
70
|
2.17
|
2.23
|
2.29
|
2.36
|
2.42
|
2.49
|
2.55
|
2.62
|
2.69
|
2.76
|
|
80
|
2.83
|
2.90
|
2.97
|
3.04
|
3.12
|
3.19
|
3.27
|
3.35
|
3.42
|
3.50
|
|
90
|
3.58
|
3.66
|
3.74
|
3.82
|
3.91
|
3.99
|
4.07
|
4.16
|
4.24
|
4.33
|
|
100
|
4.42
|
4.51
|
4.60
|
4.69
|
4.78
|
4.87
|
4.97
|
5.06
|
5.15
|
5.25
|
|
110
|
5.35
|
5.45
|
5.54
|
5.64
|
5.74
|
5.84
|
5.95
|
6.05
|
6.15
|
6.26
|
|
120
|
6.36
|
6.47
|
6.58
|
6.69
|
6.80
|
6.91
|
7.02
|
7.13
|
7.24
|
7.35
|
|
130
|
7.47
|
7.58
|
7.70
|
7.82
|
7.94
|
8.05
|
8.17
|
8.30
|
8.42
|
8.54
|
|
140
|
8.66
|
8.79
|
8.91
|
9.04
|
9.16
|
9.29
|
9.42
|
9.55
|
9.68
|
9.81
|
|
150
|
9.94
|
10.08
|
10.21
|
10.35
|
10.48
|
10.62
|
10.76
|
10.89
|
11.03
|
11.17
|
|
160
|
11.31
|
11.46
|
11.60
|
11.74
|
11.89
|
12.03
|
12.18
|
12.33
|
12.47
|
12.62
|
|
170
|
12.77
|
12.92
|
13.07
|
13.23
|
13.38
|
13.53
|
13.69
|
13.85
|
14.00
|
14.16
|
|
180
|
14.32
|
14.48
|
14.64
|
14.80
|
14.96
|
15.13
|
15.29
|
15.45
|
15.62
|
15.79
|
|
190
|
15.95
|
16.12
|
16.29
|
16.46
|
16.63
|
16.81
|
16.98
|
17.15
|
17.33
|
17.50
|
|
200
|
17.68
|
|
|
|
|
|
|
|
|
|
|
|
|
| (7) |
降伏点又は耐力が620ニュートン毎平方ミリメートルを超え685ニュートン毎平方ミリメートル以下の鋼材の許容座屈応力の値の計算に用いる座屈係数 |
|
|
λ
|
０
|
１
|
２
|
３
|
４
|
５
|
６
|
７
|
８
|
９
|
|
20
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.01
|
1.02
|
1.02
|
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
|
30
|
1.03
|
1.04
|
1.05
|
1.06
|
1.08
|
1.09
|
1.10
|
1.11
|
1.13
|
1.14
|
|
1.00
|
1.00
|
1.00
|
1.00
|
1.00
|
1.01
|
1.02
|
1.03
|
1.04
|
1.05
|
|
40
|
1.15
|
1.17
|
1.19
|
1.20
|
1.22
|
1.24
|
1.26
|
1.28
|
1.30
|
1.32
|
|
1.06
|
1.07
|
1.09
|
1.10
|
1.11
|
1.13
|
1.14
|
1.16
|
1.18
|
1.20
|
|
50
|
1.34
|
1.36
|
1.39
|
1.41
|
1.43
|
1.46
|
1.49
|
1.51
|
1.56
|
1.61
|
|
1.22
|
1.24
|
1.26
|
1.30
|
1.35
|
1.40
|
1.45
|
|
60
|
1.67
|
1.72
|
1.78
|
1.84
|
1.90
|
1.96
|
2.02
|
2.08
|
2.14
|
2.21
|
|
70
|
2.27
|
2.34
|
2.40
|
2.47
|
2.54
|
2.61
|
2.68
|
2.75
|
2.82
|
2.89
|
|
80
|
2.97
|
3.04
|
3.12
|
3.19
|
3.27
|
3.35
|
3.43
|
3.51
|
3.59
|
3.67
|
|
90
|
3.75
|
3.84
|
3.92
|
4.01
|
4.09
|
4.18
|
4.27
|
4.36
|
4.45
|
4.54
|
|
100
|
4.63
|
4.73
|
4.82
|
4.92
|
5.01
|
5.11
|
5.21
|
5.30
|
5.40
|
5.50
|
|
110
|
5.61
|
5.71
|
5.81
|
5.92
|
6.02
|
6.13
|
6.23
|
6.34
|
6.45
|
6.56
|
|
120
|
6.67
|
6.78
|
6.90
|
7.01
|
7.12
|
7.24
|
7.36
|
7.47
|
7.59
|
7.71
|
|
130
|
7.83
|
7.95
|
8.07
|
8.20
|
8.32
|
8.44
|
8.57
|
8.70
|
8.82
|
8.95
|
|
140
|
9.08
|
9.21
|
9.34
|
9.47
|
9.61
|
9.74
|
9.88
|
10.01
|
10.15
|
10.29
|
|
150
|
10.43
|
10.56
|
10.70
|
10.85
|
10.99
|
11.13
|
11.28
|
11.42
|
11.57
|
11.71
|
|
160
|
11.86
|
12.01
|
12.16
|
12.31
|
12.46
|
12.61
|
12.77
|
12.92
|
13.08
|
13.23
|
|
170
|
13.39
|
13.55
|
13.71
|
13.87
|
14.03
|
14.19
|
14.35
|
14.52
|
14.68
|
14.85
|
|
180
|
15.01
|
15.18
|
15.35
|
15.52
|
15.69
|
15.86
|
16.03
|
16.20
|
16.38
|
16.55
|
|
190
|
16.73
|
16.90
|
17.08
|
17.26
|
17.44
|
17.62
|
17.80
|
17.98
|
18.16
|
18.35
|
|
200
|
18.53
|
|
|
|
|
|
|
|
|
|
|
|
|
| 備考 |
| １ |
これらの表において、λは、有効細長比を表すものとする。 |
| ２ |
これらの表において、座屈係数が上下２段に示されている場合においては、上段の数値は管厚が外径の６分の１以下の鋼管以外の鋼材の座屈係数を、下段の数値は管厚が外径の６分の１以下の鋼管の座屈係数を表すものとする。 |
