注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：28mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
2/3
|
2
|
2
|
2
|
2
|
2
|
1/2
|
1
|
1
|
1 |
|
200
|
3/4
|
3/4
|
3
|
3
|
3
|
2/3
|
2/3
|
2
|
2
|
1/2 |
|
250
|
5
|
4/5
|
4/5
|
4
|
4
|
3/4
|
3
|
2/3
|
2
|
2 |
|
300
|
6
|
5/6
|
5/6
|
5
|
5
|
4/5
|
4
|
3/4
|
3
|
2/3 |
|
350
|
7/8
|
7
|
6/7
|
6/7
|
5/6
|
5/6
|
4/5
|
4
|
3/4
|
3 |
|
400
|
8/9
|
8/9
|
7/8
|
7/8
|
6/7
|
6/7
|
5/6
|
4/5
|
4/5
|
3/4 |
|
450
|
9/10
|
9/10
|
8/9
|
8/9
|
7/8
|
6/8
|
6/7
|
5/6
|
4/5
|
4/5 |
|
500
|
10/12
|
10/11
|
9/10
|
9/10
|
8/9
|
7/9
|
6/8
|
6/7
|
5/6
|
4/5 |
|
550
|
11/13
|
11/12
|
10/12
|
10/11
|
9/11
|
8/10
|
7/9
|
6/8
|
5/7
|
5/6 |
|
600
|
13/14
|
12/13
|
11/13
|
11/12
|
10/12
|
9/11
|
8/10
|
7/8
|
6/7
|
5/7 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：30mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
2
|
2
|
2
|
2
|
2
|
2
|
1/2
|
1
|
1
|
1 |
|
200
|
3/4
|
3/4
|
3
|
3
|
3
|
2/3
|
2/3
|
2
|
2
|
1/2 |
|
250
|
5
|
4/5
|
4/5
|
4
|
4
|
3/4
|
3
|
2/3
|
2
|
2 |
|
300
|
6
|
5/6
|
5/6
|
5
|
4/5
|
4/5
|
4
|
3/4
|
3
|
2/3 |
|
350
|
7/8
|
6/7
|
6/7
|
6/7
|
5/6
|
5/6
|
4/5
|
4
|
3/4
|
3 |
|
400
|
8/9
|
8
|
7/8
|
7/8
|
6/7
|
6/7
|
5/6
|
4/5
|
4/5
|
3/4 |
|
450
|
9/10
|
9/10
|
8/9
|
8/9
|
7/8
|
6/8
|
6/7
|
5/6
|
4/5
|
4/5 |
|
500
|
10/11
|
10/11
|
9/10
|
9/10
|
8/9
|
7/9
|
6/8
|
6/7
|
5/6
|
4/5 |
|
550
|
11/13
|
11/12
|
10/11
|
10/11
|
9/10
|
8/10
|
7/9
|
6/8
|
5/7
|
5/6 |
|
600
|
12/14
|
12/13
|
11/13
|
11/12
|
10/12
|
9/11
|
8/10
|
7/8
|
6/7
|
5/7 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：31mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
2
|
2
|
2
|
2
|
2
|
2
|
1/2
|
1
|
1
|
1 |
|
200
|
3/4
|
3
|
3
|
3
|
3
|
2/3
|
2
|
2
|
2
|
1/2 |
|
250
|
4/5
|
4/5
|
4
|
4
|
4
|
3/4
|
3
|
2/3
|
2
|
2 |
|
300
|
6
|
5/6
|
5/6
|
5
|
4/5
|
4/5
|
4
|
3/4
|
3
|
2/3 |
|
350
|
7/8
|
6/7
|
6/7
|
6
|
5/6
|
5/6
|
4/5
|
4
|
3/4
|
3 |
|
400
|
8/9
|
8
|
7/8
|
7/8
|
6/7
|
6/7
|
5/6
|
4/5
|
4/5
|
3/4 |
|
450
|
9/10
|
9/10
|
8/9
|
8/9
|
7/8
|
6/8
|
6/7
|
5/6
|
4/5
|
4/5 |
|
500
|
10/11
|
10/11
|
9/10
|
9/10
|
8/9
|
7/9
|
6/8
|
6/7
|
5/6
|
4/5 |
|
550
|
11/13
|
11/12
|
10/11
|
10/11
|
9/10
|
8/10
|
7/9
|
6/8
|
5/7
|
5/6 |
|
600
|
12/14
|
12/13
|
11/13
|
11/12
|
10/11
|
9/11
|
8/10
|
7/8
|
6/7
|
5/7 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：32mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
2
|
2
|
2
|
2
|
2
|
1/2
|
1/2
|
1
|
1
|
1 |
|
200
|
3/4
|
3
|
3
|
3
|
3
|
2/3
|
2
|
2
|
2
|
1/2 |
|
250
|
4/5
|
4/5
|
4
|
4
|
3/4
|
3/4
|
3
|
2/3
|
2
|
2 |
|
300
|
6
|
5/6
|
5/6
|
5
|
4/5
|
4/5
|
3/4
|
3/4
|
3
|
2/3 |
|
350
|
7
|
6/7
|
6/7
|
6
|
5/6
|
5/6
|
4/5
|
4
|
3/4
|
3 |
|
400
|
8/9
|
7/8
|
7/8
|
7/8
|
6/7
|
5/7
|
5/6
|
4/5
|
4/5
|
3/4 |
|
450
|
9/10
|
9/10
|
8/9
|
8/9
|
7/8
|
6/8
|
6/7
|
5/6
|
4/5
|
4/5 |
|
500
|
10/11
|
10/11
|
9/10
|
9/10
|
8/9
|
7/9
|
6/8
|
6/7
|
5/6
|
4/5 |
|
550
|
11/13
|
11/12
|
10/11
|
10/11
|
9/10
|
8/10
|
7/9
|
6/8
|
5/7
|
5/6 |
|
600
|
12/14
|
12/13
|
11/13
|
11/12
|
10/11
|
9/11
|
8/10
|
7/8
|
6/7
|
5/7 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：33mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
2
|
2
|
2
|
2
|
2
|
1/2
|
1/2
|
1
|
1
|
1 |
|
200
|
3/4
|
3
|
3
|
3
|
3
|
2/3
|
2
|
2
|
2
|
1/2 |
|
250
|
4/5
|
4/5
|
4
|
4
|
3/4
|
3/4
|
3
|
2/3
|
2
|
2 |
|
300
|
6
|
5/6
|
5/6
|
5
|
4/5
|
4/5
|
3/4
|
3/4
|
3
|
2/3 |
|
350
|
7
|
6/7
|
6/7
|
6
|
5/6
|
5/6
|
4/5
|
4
|
3/4
|
3 |
|
400
|
8/9
|
7/8
|
7/8
|
7
|
6/7
|
5/7
|
5/6
|
4/5
|
4/5
|
3/4 |
|
450
|
9/10
|
9
|
8/9
|
8/9
|
7/8
|
6/8
|
6/7
|
5/6
|
4/5
|
4/5 |
|
500
|
10/11
|
10/11
|
9/10
|
9/10
|
8/9
|
7/9
|
6/8
|
6/7
|
5/6
|
4/5 |
|
550
|
11/13
|
11/12
|
10/11
|
10/11
|
9/10
|
8/10
|
7/9
|
6/8
|
5/7
|
5/6 |
|
600
|
12/14
|
12/13
|
11/13
|
11/12
|
10/11
|
9/11
|
8/10
|
7/8
|
6/7
|
5/7 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：35mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
2
|
2
|
2
|
2
|
2
|
1/2
|
1
|
1
|
1
|
1 |
|
200
|
3
|
3
|
3
|
3
|
2/3
|
2/3
|
2
|
2
|
2
|
1/2 |
|
250
|
4/5
|
4/5
|
4
|
4
|
3/4
|
3/4
|
3
|
2/3
|
2
|
2 |
|
300
|
5/6
|
5/6
|
5
|
5
|
4/5
|
4/5
|
3/4
|
3/4
|
3
|
2/3 |
|
350
|
7
|
6/7
|
6/7
|
6
|
5/6
|
5/6
|
4/5
|
4
|
3/4
|
3 |
|
400
|
8/9
|
7/8
|
7/8
|
7
|
6/7
|
5/7
|
5/6
|
4/5
|
4/5
|
3/4 |
|
450
|
9/10
|
8/9
|
8/9
|
8/9
|
7/8
|
6/8
|
6/7
|
5/6
|
4/5
|
4/5 |
|
500
|
10/11
|
10/11
|
9/10
|
9/10
|
8/9
|
7/9
|
6/8
|
5/7
|
5/6
|
4/5 |
|
550
|
11/12
|
11/12
|
10/11
|
10/11
|
9/10
|
8/10
|
7/9
|
6/8
|
5/7
|
5/6 |
|
600
|
12/14
|
12/13
|
11/12
|
11/12
|
10/11
|
9/11
|
8/9
|
7/8
|
6/7
|
5/7 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：36mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
2
|
2
|
2
|
2
|
2
|
1/2
|
1
|
1
|
1
|
1 |
|
200
|
3
|
3
|
3
|
3
|
2/3
|
2/3
|
2
|
2
|
2
|
1/2 |
|
250
|
4/5
|
4
|
4
|
4
|
3/4
|
3/4
|
3
|
2/3
|
2
|
2 |
|
300
|
5/6
|
5/6
|
5
|
5
|
4/5
|
4/5
|
3/4
|
3/4
|
3
|
2/3 |
|
350
|
7
|
6/7
|
6/7
|
6
|
5/6
|
5/6
|
4/5
|
4
|
3/4
|
3 |
|
400
|
8/9
|
7/8
|
7/8
|
7
|
6/7
|
5/7
|
5/6
|
4/5
|
4/5
|
3/4 |
|
450
|
9/10
|
8/9
|
8/9
|
8
|
7/8
|
6/8
|
6/7
|
5/6
|
4/5
|
4/5 |
|
500
|
10/11
|
9/11
|
9/10
|
9/10
|
8/9
|
7/9
|
6/8
|
5/7
|
5/6
|
4/5 |
|
550
|
11/12
|
11/12
|
10/11
|
10/11
|
9/10
|
8/10
|
7/9
|
6/7
|
5/7
|
5/6 |
|
600
|
12/14
|
12/13
|
11/12
|
11/12
|
10/11
|
9/11
|
8/9
|
7/8
|
6/7
|
5/7 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：37mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
2
|
2
|
2
|
2
|
1/2
|
1/2
|
1
|
1
|
1
|
1 |
|
200
|
3
|
3
|
3
|
3
|
2/3
|
2/3
|
2
|
2
|
2
|
1/2 |
|
250
|
4/5
|
4
|
4
|
4
|
3/4
|
3/4
|
3
|
2/3
|
2
|
2 |
|
300
|
5/6
|
5/6
|
5
|
5
|
4/5
|
4/5
|
3/4
|
3/4
|
3
|
2/3 |
|
350
|
6/7
|
6/7
|
6/7
|
6
|
5/6
|
5/6
|
4/5
|
4
|
3/4
|
3 |
|
400
|
8/9
|
7/8
|
7/8
|
7
|
6/7
|
5/7
|
5/6
|
4/5
|
4/5
|
3/4 |
|
450
|
9/10
|
8/9
|
8/9
|
8
|
7/8
|
6/8
|
5/7
|
5/6
|
4/5
|
4/5 |
|
500
|
10/11
|
9/11
|
9/10
|
9/10
|
8/9
|
7/9
|
6/8
|
5/7
|
5/6
|
4/5 |
|
550
|
11/12
|
11/12
|
10/11
|
10/11
|
9/10
|
8/10
|
7/9
|
6/7
|
5/7
|
5/6 |
|
600
|
12/14
|
12/13
|
11/12
|
11/12
|
10/11
|
9/11
|
8/9
|
7/8
|
6/7
|
5/7 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：38mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
2
|
2
|
2
|
2
|
1/2
|
1
|
1
|
1
|
1
|
1 |
|
200
|
3
|
3
|
3
|
3
|
2/3
|
2
|
2
|
2
|
1/2
|
1/2 |
|
250
|
4/5
|
4
|
4
|
4
|
3/4
|
3
|
3
|
2/3
|
2
|
2 |
|
300
|
5/6
|
5/6
|
5
|
5
|
4/5
|
4
|
3/4
|
3/4
|
3
|
2/3 |
|
350
|
6/7
|
6/7
|
6
|
6
|
5/6
|
4/5
|
4/5
|
4
|
3/4
|
3 |
|
400
|
8
|
7/8
|
7/8
|
7
|
6/7
|
5/6
|
5/6
|
4/5
|
4/5
|
3/4 |
|
450
|
9/10
|
8/9
|
8/9
|
8
|
7/8
|
6/7
|
5/7
|
5/6
|
4/5
|
4/5 |
|
500
|
10/11
|
9/10
|
9/10
|
9
|
8/9
|
7/8
|
6/8
|
5/7
|
5/6
|
4/5 |
|
550
|
11/12
|
10/12
|
10/11
|
10/11
|
9/10
|
8/9
|
7/8
|
6/7
|
5/7
|
5/6 |
|
600
|
12/14
|
12/13
|
11/12
|
11/12
|
10/11
|
8/10
|
8/9
|
7/8
|
6/7
|
5/7 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：40mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
2
|
2
|
2
|
2
|
1/2
|
1
|
1
|
1
|
1
|
1 |
|
200
|
3
|
3
|
3
|
3
|
2/3
|
2
|
2
|
2
|
1/2
|
1/2 |
|
250
|
4/5
|
4
|
4
|
4
|
3/4
|
3
|
3
|
2/3
|
2
|
2 |
|
300
|
5/6
|
5
|
5
|
5
|
4/5
|
4
|
3/4
|
3
|
3
|
2/3 |
|
350
|
6/7
|
6/7
|
6
|
6
|
5/6
|
4/5
|
4/5
|
3/4
|
3/4
|
3 |
|
400
|
7/8
|
7/8
|
7/8
|
7
|
6/7
|
5/6
|
5/6
|
4/5
|
4
|
3/4 |
|
450
|
9/10
|
8/9
|
8/9
|
8
|
7/8
|
6/7
|
5/7
|
5/6
|
4/5
|
4/5 |
|
500
|
10/11
|
9/10
|
9/10
|
9
|
8/9
|
7/8
|
6/8
|
5/7
|
5/6
|
4/5 |
|
550
|
11/12
|
10/12
|
10/11
|
10/11
|
9/10
|
8/9
|
7/8
|
6/7
|
5/7
|
5/6 |
|
600
|
12/13
|
11/13
|
11/12
|
11/12
|
10/11
|
8/10
|
8/9
|
7/8
|
6/7
|
5/7 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：41mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
2
|
2
|
2
|
1/2
|
1
|
1
|
1
|
1
|
1
|
1 |
|
200
|
3
|
3
|
3
|
2/3
|
2/3
|
2
|
2
|
2
|
1/2
|
1 |
|
250
|
4
|
4
|
4
|
3/4
|
3/4
|
3
|
3
|
2/3
|
2
|
2 |
|
300
|
5/6
|
5
|
5
|
4/5
|
4/5
|
4
|
3/4
|
3
|
3
|
2/3 |
|
350
|
6/7
|
6/7
|
6
|
5/6
|
5/6
|
4/5
|
4/5
|
3/4
|
3/4
|
3 |
|
400
|
7/8
|
7/8
|
7
|
6/7
|
6/7
|
5/6
|
5/6
|
4/5
|
4
|
3/4 |
|
450
|
9/10
|
8/9
|
8/9
|
7/8
|
7/8
|
6/7
|
5/7
|
5/6
|
4/5
|
4/5 |
|
500
|
10/11
|
9/10
|
9/10
|
8/9
|
8/9
|
7/8
|
6/7
|
5/7
|
5/6
|
4/5 |
|
550
|
11/12
|
10/12
|
10/11
|
9/10
|
9/10
|
8/9
|
7/8
|
6/7
|
5/7
|
5/6 |
|
600
|
12/13
|
11/13
|
11/12
|
10/12
|
10/11
|
8/10
|
8/9
|
7/8
|
6/7
|
5/6 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：42mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
2
|
2
|
2
|
1/2
|
1
|
1
|
1
|
1
|
1
|
1 |
|
200
|
3
|
3
|
3
|
2/3
|
2/3
|
2
|
2
|
2
|
1/2
|
1 |
|
250
|
4
|
4
|
4
|
3/4
|
3/4
|
3
|
2/3
|
2/3
|
2
|
2 |
|
300
|
5/6
|
5
|
5
|
4/5
|
4/5
|
4
|
3/4
|
3
|
3
|
2/3 |
|
350
|
6/7
|
6/7
|
6
|
5/6
|
5/6
|
4/5
|
4/5
|
3/4
|
3/4
|
3 |
|
400
|
7/8
|
7/8
|
7
|
6/7
|
6/7
|
5/6
|
5/6
|
4/5
|
4
|
3/4 |
|
450
|
9/10
|
8/9
|
8/9
|
7/8
|
7/8
|
6/7
|
5/7
|
5/6
|
4/5
|
4/5 |
|
500
|
10/11
|
9/10
|
9/10
|
8/9
|
8/9
|
7/8
|
6/7
|
5/7
|
5/6
|
4/5 |
|
550
|
11/12
|
10/11
|
10/11
|
9/10
|
9/10
|
8/9
|
7/8
|
6/7
|
5/6
|
5/6 |
|
600
|
12/13
|
11/13
|
11/12
|
10/12
|
9/11
|
8/10
|
7/9
|
7/8
|
6/7
|
5/6 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：43mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
2
|
2
|
1/2
|
1
|
1
|
1
|
1
|
1
|
1
|
1 |
|
200
|
3
|
3
|
3
|
2/3
|
2
|
2
|
2
|
2
|
1/2
|
1 |
|
250
|
4
|
4
|
4
|
3/4
|
3/4
|
3
|
2/3
|
2/3
|
2
|
2 |
|
300
|
5/6
|
5
|
5
|
4/5
|
4/5
|
4
|
3/4
|
3
|
2/3
|
2/3 |
|
350
|
6/7
|
6/7
|
6
|
5/6
|
5/6
|
4/5
|
4/5
|
3/4
|
3/4
|
3 |
|
400
|
7/8
|
7/8
|
7
|
6/7
|
6/7
|
5/6
|
5/6
|
4/5
|
4
|
3/4 |
|
450
|
8/9
|
8/9
|
8/9
|
7/8
|
7/8
|
6/7
|
5/7
|
5/6
|
4/5
|
4/5 |
|
500
|
10/11
|
9/10
|
9/10
|
8/9
|
8/9
|
7/8
|
6/7
|
5/6
|
5/6
|
4/5 |
|
550
|
11/12
|
10/11
|
10/11
|
9/10
|
9/10
|
8/9
|
7/8
|
6/7
|
5/6
|
5/6 |
|
600
|
12/13
|
11/13
|
11/12
|
10/11
|
9/11
|
8/10
|
7/9
|
7/8
|
6/7
|
5/6 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：45mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
2
|
1/2
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1 |
|
200
|
3
|
3
|
2/3
|
2/3
|
2
|
2
|
2
|
1/2
|
1/2
|
1 |
|
250
|
4
|
4
|
3/4
|
3/4
|
3
|
3
|
2/3
|
2/3
|
2
|
2 |
|
300
|
5/6
|
5
|
5
|
4/5
|
4/5
|
3/4
|
3/4
|
3
|
2/3
|
2/3 |
|
350
|
6/7
|
6
|
6
|
5/6
|
5/6
|
4/5
|
4/5
|
3/4
|
3/4
|
3 |
|
400
|
7/8
|
7/8
|
7
|
6/7
|
6/7
|
5/6
|
5/6
|
4/5
|
4
|
3/4 |
|
450
|
8/9
|
8/9
|
8
|
7/8
|
7/8
|
6/7
|
5/6
|
5/6
|
4/5
|
4/5 |
|
500
|
10/11
|
9/10
|
9/10
|
8/9
|
8/9
|
7/8
|
6/7
|
5/6
|
5/6
|
4/5 |
|
550
|
11/12
|
10/11
|
10/11
|
9/10
|
8/10
|
7/9
|
7/8
|
6/7
|
5/6
|
5/6 |
|
600
|
12/13
|
11/13
|
11/12
|
10/11
|
9/11
|
8/10
|
7/9
|
6/8
|
6/7
|
5/6 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：46mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
2
|
1/2
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1 |
|
200
|
3
|
3
|
2/3
|
2
|
2
|
2
|
2
|
1/2
|
1/2
|
1 |
|
250
|
4
|
4
|
3/4
|
3/4
|
3
|
3
|
2/3
|
2
|
2
|
2 |
|
300
|
5
|
5
|
4/5
|
4/5
|
4
|
3/4
|
3/4
|
3
|
2/3
|
2/3 |
|
350
|
6/7
|
6
|
6
|
5/6
|
5/6
|
4/5
|
4/5
|
3/4
|
3/4
|
3 |
|
400
|
7/8
|
7/8
|
7
|
6/7
|
6/7
|
5/6
|
5/6
|
4/5
|
4
|
3/4 |
|
450
|
8/9
|
8/9
|
8
|
7/8
|
7/8
|
6/7
|
5/6
|
5/6
|
4/5
|
4 |
|
500
|
9/11
|
9/10
|
9/10
|
8/9
|
8/9
|
7/8
|
6/7
|
5/6
|
5/6
|
4/5 |
|
550
|
11/12
|
10/11
|
10/11
|
9/10
|
8/10
|
7/9
|
7/8
|
6/7
|
5/6
|
5/6 |
|
600
|
12/13
|
11/13
|
11/12
|
10/11
|
9/11
|
8/10
|
7/9
|
6/8
|
6/7
|
5/6 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：47mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
1/2
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1 |
|
200
|
3
|
2/3
|
2/3
|
2
|
2
|
2
|
2
|
1/2
|
1
|
1 |
|
250
|
4
|
4
|
3/4
|
3/4
|
3
|
3
|
2/3
|
2
|
2
|
2 |
|
300
|
5
|
5
|
4/5
|
4/5
|
4
|
3/4
|
3/4
|
3
|
2/3
|
2/3 |
|
350
|
6/7
|
6
|
5/6
|
5/6
|
5
|
4/5
|
4/5
|
3/4
|
3/4
|
3 |
|
400
|
7/8
|
7/8
|
7
|
6/7
|
6/7
|
5/6
|
4/5
|
4/5
|
4
|
3/4 |
|
450
|
8/9
|
8/9
|
8
|
7/8
|
7/8
|
6/7
|
5/6
|
5/6
|
4/5
|
4 |
|
500
|
9/11
|
9/10
|
9/10
|
8/9
|
7/9
|
7/8
|
6/7
|
5/6
|
5/6
|
4/5 |
|
550
|
11/12
|
10/11
|
10/11
|
9/10
|
8/10
|
7/9
|
7/8
|
6/7
|
5/6
|
5/6 |
|
600
|
12/13
|
11/12
|
11/12
|
10/11
|
9/11
|
8/10
|
7/9
|
6/8
|
6/7
|
5/6 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：48mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
1/2
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1 |
|
200
|
3
|
2/3
|
2/3
|
2
|
2
|
2
|
2
|
1/2
|
1
|
1 |
|
250
|
4
|
4
|
3/4
|
3
|
3
|
3
|
2/3
|
2
|
2
|
2 |
|
300
|
5
|
5
|
4/5
|
4/5
|
4
|
3/4
|
3/4
|
3
|
2/3
|
2/3 |
|
350
|
6/7
|
6
|
5/6
|
5/6
|
5
|
4/5
|
4/5
|
3/4
|
3/4
|
3 |
|
400
|
7/8
|
7/8
|
6/7
|
6/7
|
6/7
|
5/6
|
4/5
|
4/5
|
3/4
|
3/4 |
|
450
|
8/9
|
8/9
|
8
|
7/8
|
7/8
|
6/7
|
5/6
|
5/6
|
4/5
|
4 |
|
500
|
9/11
|
9/10
|
9
|
8/9
|
7/9
|
7/8
|
6/7
|
5/6
|
5/6
|
4/5 |
|
550
|
11/12
|
10/11
|
10/11
|
9/10
|
8/10
|
7/9
|
7/8
|
6/7
|
5/6
|
5/6 |
|
600
|
12/13
|
11/12
|
11/12
|
10/11
|
9/11
|
8/10
|
7/9
|
6/8
|
6/7
|
5/6 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：50mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1 |
|
200
|
2/3
|
2/3
|
2
|
2
|
2
|
2
|
2
|
1/2
|
1
|
1 |
|
250
|
4
|
3/4
|
3/4
|
3
|
3
|
3
|
2/3
|
2
|
2
|
2 |
|
300
|
5
|
5
|
4/5
|
4/5
|
4
|
3/4
|
3/4
|
3
|
2/3
|
2/3 |
|
350
|
6/7
|
6
|
5/6
|
5/6
|
5
|
4/5
|
4
|
3/4
|
3
|
3 |
|
400
|
7/8
|
7
|
6/7
|
6/7
|
6
|
5/6
|
4/5
|
4/5
|
3/4
|
3/4 |
|
450
|
8/9
|
8/9
|
7/8
|
7/8
|
6/7
|
6/7
|
5/6
|
4/5
|
4/5
|
4 |
|
500
|
9/10
|
9/10
|
8/9
|
8/9
|
7/9
|
7/8
|
6/7
|
5/6
|
5/6
|
4/5 |
|
550
|
10/12
|
10/11
|
10/11
|
9/10
|
8/10
|
7/9
|
7/8
|
6/7
|
5/6
|
5/6 |
|
600
|
12/13
|
11/12
|
11/12
|
10/11
|
9/11
|
8/10
|
7/9
|
6/8
|
6/7
|
5/6 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：52mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1 |
|
200
|
2/3
|
2
|
2
|
2
|
2
|
2
|
1/2
|
1/2
|
1
|
1 |
|
250
|
4
|
3/4
|
3
|
3
|
3
|
2/3
|
2/3
|
2
|
2
|
2 |
|
300
|
5
|
4/5
|
4/5
|
4
|
4
|
3/4
|
3/4
|
3
|
2/3
|
2 |
|
350
|
6
|
6
|
5/6
|
5/6
|
5
|
4/5
|
4
|
3/4
|
3
|
3 |
|
400
|
7/8
|
7
|
6/7
|
6/7
|
5/6
|
5/6
|
4/5
|
4/5
|
3/4
|
3/4 |
|
450
|
8/9
|
8/9
|
7/8
|
7/8
|
6/7
|
6/7
|
5/6
|
4/5
|
4/5
|
4 |
|
500
|
9/10
|
9/10
|
8/9
|
8/9
|
7/8
|
6/8
|
6/7
|
5/6
|
5/6
|
4/5 |
|
550
|
10/12
|
10/11
|
9/10
|
9/10
|
8/10
|
7/9
|
6/8
|
6/7
|
5/6
|
5/6 |
|
600
|
11/13
|
11/12
|
10/12
|
10/11
|
9/11
|
8/10
|
7/9
|
6/8
|
6/7
|
5/6 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：56mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
- |
|
200
|
2
|
2
|
2
|
2
|
2
|
2
|
1/2
|
1
|
1
|
1 |
|
250
|
3/4
|
3
|
3
|
3
|
3
|
2/3
|
2
|
2
|
2
|
1/2 |
|
300
|
4/5
|
4/5
|
4
|
4
|
4
|
3/4
|
3
|
2/3
|
2/3
|
2 |
|
350
|
6
|
5/6
|
5/6
|
5
|
4/5
|
4/5
|
4
|
3/4
|
3
|
2/3 |
|
400
|
7/8
|
6/7
|
6/7
|
6
|
5/6
|
5/6
|
4/5
|
4/5
|
3/4
|
3/4 |
|
450
|
8/9
|
8
|
7/8
|
7/8
|
6/7
|
6/7
|
5/6
|
4/5
|
4/5
|
3/4 |
|
500
|
9/10
|
9/10
|
8/9
|
8/9
|
7/8
|
6/8
|
6/7
|
5/6
|
4/5
|
4/5 |
|
550
|
10/11
|
10/11
|
9/10
|
9/10
|
8/9
|
7/9
|
6/8
|
6/7
|
5/6
|
4/5 |
|
600
|
11/13
|
11/12
|
10/11
|
10/11
|
9/10
|
8/10
|
7/9
|
6/8
|
6/7
|
5/6 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：58mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
-
|
- |
|
200
|
2
|
2
|
2
|
2
|
2
|
1/2
|
1/2
|
1
|
1
|
1 |
|
250
|
3/4
|
3
|
3
|
3
|
3
|
2/3
|
2
|
2
|
2
|
1/2 |
|
300
|
4/5
|
4/5
|
4
|
4
|
3/4
|
3/4
|
3
|
2/3
|
2/3
|
2 |
|
350
|
6
|
5/6
|
5/6
|
5
|
4/5
|
4/5
|
3/4
|
3/4
|
3
|
2/3 |
|
400
|
7
|
6/7
|
6/7
|
6
|
5/6
|
5/6
|
4/5
|
4
|
3/4
|
3/4 |
|
450
|
8/9
|
7/8
|
7/8
|
7
|
6/7
|
5/7
|
5/6
|
4/5
|
4/5
|
3/4 |
|
500
|
9/10
|
9
|
8/9
|
8/9
|
7/8
|
6/8
|
6/7
|
5/6
|
4/5
|
4/5 |
|
550
|
10/11
|
10/11
|
9/10
|
9/10
|
8/9
|
7/9
|
6/8
|
6/7
|
5/6
|
4/5 |
|
600
|
11/13
|
11/12
|
10/11
|
10/11
|
9/10
|
8/10
|
7/9
|
6/8
|
5/7
|
5/6 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：60mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
1
|
1
|
1
|
1
|
1
|
1
|
1
|
-
|
-
|
- |
|
200
|
2
|
2
|
2
|
2
|
2
|
1/2
|
1
|
1
|
1
|
1 |
|
250
|
3
|
3
|
3
|
3
|
2/3
|
2/3
|
2
|
2
|
2
|
1/2 |
|
300
|
4/5
|
4/5
|
4
|
4
|
3/4
|
3/4
|
3
|
2/3
|
2/3
|
2 |
|
350
|
5/6
|
5/6
|
5
|
5
|
4/5
|
4/5
|
3/4
|
3/4
|
3
|
2/3 |
|
400
|
7
|
6/7
|
6/7
|
6
|
5/6
|
5/6
|
4/5
|
4
|
3/4
|
3/4 |
|
450
|
8/9
|
7/8
|
7/8
|
7
|
6/7
|
5/7
|
5/6
|
4/5
|
4/5
|
3/4 |
|
500
|
9/10
|
8/9
|
8/9
|
8/9
|
7/8
|
6/8
|
6/7
|
5/6
|
4/5
|
4/5 |
|
550
|
10/11
|
10/11
|
9/10
|
9/10
|
8/9
|
7/9
|
6/8
|
5/7
|
5/6
|
4/5 |
|
600
|
11/12
|
11/12
|
10/11
|
10/11
|
9/10
|
8/10
|
7/9
|
6/8
|
5/7
|
5/6 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
梁纵向钢筋单排最大根数 (净保护层厚度：62mm）
|
梁宽 b
（mm）
|
纵筋直径（mm）
|
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
|
150
|
1
|
1
|
1
|
1
|
1
|
1
|
-
|
-
|
-
|
- |
|
200
|
2
|
2
|
2
|
2
|
1/2
|
1/2
|
1
|
1
|
1
|
1 |
|
250
|
3
|
3
|
3
|
3
|
2/3
|
2/3
|
2
|
2
|
2
|
1/2 |
|
300
|
4/5
|
4
|
4
|
4
|
3/4
|
3/4
|
3
|
2/3
|
2
|
2 |
|
350
|
5/6
|
5/6
|
5
|
5
|
4/5
|
4/5
|
3/4
|
3/4
|
3
|
2/3 |
|
400
|
6/7
|
6/7
|
6/7
|
6
|
5/6
|
5/6
|
4/5
|
4
|
3/4
|
3 |
|
450
|
8/9
|
7/8
|
7/8
|
7
|
6/7
|
5/7
|
5/6
|
4/5
|
4/5
|
3/4 |
|
500
|
9/10
|
8/9
|
8/9
|
8
|
7/8
|
6/8
|
5/7
|
5/6
|
4/5
|
4/5 |
|
550
|
10/11
|
9/11
|
9/10
|
9/10
|
8/9
|
7/9
|
6/8
|
5/7
|
5/6
|
4/5 |
|
600
|
11/12
|
11/12
|
10/11
|
10/11
|
9/10
|
8/10
|
7/9
|
6/7
|
5/7
|
5/6 |
|
梁宽 b
|
14
|
16
|
18
|
20
|
22
|
25
|
28
|
32
|
36
|
40 |
注：表内分数值，其分子为梁上部纵筋单排最大根数，分母为梁下部钢筋单排最大根数。
