Type | Stringer | Step | Inclination (a) |
Width of ladder (B: mm) |
Height of ladder (H: mm) |
A | Flat steel | Checker plate | 55°, 60 ° |
450, 600 |
750~2850 |
B | Steel mesh | ||||
C | Angle steel | Checker plate | 3000~4050 | ||
D | Steel mesh |
No. | Type | Number of steps | H (mm) | H1(mm) | H2(mm) | H3(mm) | L(mm) | |
a=55° | a=60° | |||||||
1 | A,B C,D |
3 | 750 | 230 | 170 | 120 | 911 | 892 |
2 | 3 | 900 | 240 | 190 | 230 | 1124 | 1065 | |
3 | 4 | 1050 | 230 | 180 | 180 | 1307 | 1238 | |
4 | 5 | 1200 | 230 | 165 | 115 | 1490 | 1412 | |
5 | 5 | 1350 | 235 | 185 | 225 | 1673 | 1585 | |
6 | 6 | 1500 | 230 | 180 | 170 | 1856 | 1758 | |
7 | 7 | 1650 | 230 | 155 | 115 | 2039 | 1931 | |
8 | 7 | 1800 | 235 | 185 | 205 | 2222 | 2104 | |
9 | 8 | 1950 | 230 | 180 | 160 | 2406 | 2278 | |
10 | 5 | 2100 | 240 | 190 | 230 | 2589 | 2451 | |
11 | 9 | 2250 | 230 | 180 | 230 | 2772 | 2624 | |
12 | 10 | 2400 | 230 | 180 | 150 | 2955 | 2797 | |
13 | 10 | 2550 | 240 | 190 | 200 | 3138 | 2970 | |
14 | 11 | 2700 | 230 | 180 | 220 | 3321 | 3144 | |
15 | 12 | 2850 | 230 | 180 | 140 | 3504 | 3317 | |
16 | 12 | 3000 | 235 | 185 | 230 | 3687 | 3490 | |
17 | 13 | 3150 | 230 | 180 | 210 | 3993 | 3663 | |
18 | 14 | 3300 | 230 | 180 | 130 | 4951 | 3837 | |
19 | 14 | 3450 | 235 | 185 | 210 | 4237 | 4019 | |
20 | 15 | 360 | 230 | 180 | 200 | 4430 | 4183 | |
21 | 16 | 3750 | 230 | 180 | 120 | 4603 | 4356 | |
22 | 16 | 3900 | 235 | 185 | 190 | 4786 | 4529 | |
23 | 17 | 4050 | 230 | 180 | 190 | 4969 | 4703 |