Steel Tray NEMA Class, Physical and Structural Properties C-Channel Swage Ladder
NEMA Standard VE-1 Class
NEMA Ld/Span
Mill-Galv. System Number
HDGAF System Number
304 SS System Number
Actual Load Depth
Side Rail Height Flange Width
1 Sect. Mod. of 2 Rails
Moment of Inertia for 2 Rails Ix
Min X-Sect. Area of 2 Rails per NEC 392.7
13 ⁄16 " 13 ⁄16 " 13 ⁄16 " 13 ⁄16 " 13 ⁄16 " 13 ⁄16 " 13 ⁄16 " 13 ⁄16 " 13 ⁄16 " 13 ⁄16 " 13 ⁄16 " 13 ⁄16 " 13 ⁄16 " 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4"
4 1/4" 5 1/4" 6 1/4" 7 1/4" 4 1/4" 5 1/4" 6 1/4" 7 1/4" 4 1/4" 5 1/4" 6 1/4" 7 1/4" 4 1/4" 5 1/4" 6 1/4" 7 1/4" 4 1/4" 5 1/4" 6 1/4" 7 1/4" 4 1/4" 5 1/4" 6 1/4" 7 1/4" 4 1/4" 5 1/4" 6 1/4" 7 1/4" 5 1/4" 6 1/4" 7 1/4"
8B36
6237
8B3T
3"
(76mm)
(108mm)
0.678 in 3
1.370 in 4
0.40 in 2
8246
6247
824T
4" (102mm)
(133mm)
0.816 in 3
2.142 in 4
0.40 in 2
75 lb.ft. 12' span
8A-12A
8256
6257
825T
5" (127mm)
1.072 in 3
3.352 in 4
0.70 in 2
(159mm)
8B66
6B67
8B6T
6" (152mm)
1.574 in 3
5.516 in 4
0.70 in 2
(184mm)
6B36
6B37
6B3T
3"
(76mm)
(108mm)
0.834 in 3
1.690 in 4
0.70 in 2
8B46
6B47
8B4T
4" (102mm)
(133mm)
0.924 in 3
2.321 in 4
0.40 in 2
100 lb./ft 12' span
12C
6256
6257
625T
5" (127mm)
(159mm)
1.330 in 3
4.158 in 4
0.70 in 2
8B66
6267
8B6T
6" (152mm)
(184mm)
1.574 in 3
5.516 in 4
0.70 in 2
8D36
6D37
8D3T
3"
(76mm)
(108mm)
0.852 in 3
1.736 in 4
0.40 in 2
8D46
6447
8D4T
4" (102mm)
1.146 in 3
2.894 in 4
0.70 in 2
(133mm)
50 lb./ft. 16' span
16A
8456
6457
845T
5" (127mm)
1.330 in 3
4.156 in 4
0.70 in 2
(159mm)
6466
6467
646T
6" (152mm)
(184mm)
2.062 in 3
7.478 in 4
1.00 in 2
6D36
6D37
6D3T
3"
(76mm)
(108mm)
1.056 in 3
2.152 in 4
0.70 in 2
8D46
6447
8D4T
4" (102mm)
(133mm)
1.146 in 3
2.894 in 4
0.70 in 2
75 lb./ft. 16' span
16B
6456
6457
645T
5" (127mm)
(159mm)
1.652 in 3
5.160 in 4
1.00 in 2
6466
6467
646T
6" (152mm)
(184mm)
2.062 in 3
7.478 in 4
1.00 in 2
4D36
4D37
4D3T
3"
(76mm)
2.652 in 4
1.00 in 2
(108mm)
1.298 in 3
6446
6447
644T
4" (102mm)
(133mm)
1.280 in 3
3.360 in 4
0.70 in 2
100 lb./ft. 16' span
16C
6456
6457
645T
5" (127mm)
(159mm)
1.652 in 3
5.160 in 4
1.00 in 2
8D66
6D67
8D6T
6" (152mm)
(184mm)
1.814 in 3
6.370 in 4
0.70 in 2
6D36
6D37
6D3T
3"
(76mm)
(108mm)
1.056 in 3
2.152 in 4
0.70 in 2
6446
6447
644T
4" (102mm)
(133mm)
1.280 in 3
3.360 in 4
0.70 in 2
50 lb./ft. 20' span
20A
6456
6457
645T
5" (127mm)
(159mm)
1.652 in 3
5.160 in 4
1.00 in 2
6466
6467
646T
6" (152mm)
(184mm)
2.062 in 3
7.478 in 4
1.00 in 2
2D36
2D37
2D3T
3"
(76mm)
(108mm)
1.758 in 3
3.604 in 4
1.00 in 2
4D46
4D47
4D4T
4" (102mm)
(133mm)
1.744 in 3
4.418 in 4
1.00 in 2
75 lb./ft. 20' span
20B
6D56
6D57
6D5T
5" (127mm)
(159mm)
1.814 in 3
5.486 in 4
1.00 in 2
6D66
6D67
6D6T
6" (152mm)
(184mm)
2.246 in 3
7.902 in 4
1.00 in 2
2D46
2D47
2D4T
4" (102mm)
(133mm)
2.370 in 3
6.026 in 4
1.50 in 2
100 lb./ft. 20' span
20C
4D56
4D57
4D5T
5" (127mm)
(159mm)
2.240 in 3
6.778 in 4
1.00 in 2
4466
4467
446T
6" (152mm)
(184mm)
2.556 in 3
9.264 in 4
1.00 in 2
EXTRA HEAVY DUTY - VERY LONG SPAN TRAYS- 6, 9 OR 12 RUNG SPACING
6 1/4 "
1 1/4"
3.052 in 3
(159mm)
9.270 in 4
1.50 in 2
2D56
2D57
2D5T
5" (127mm)
20C+
6 1 ⁄4" (159mm)
11D56
11D57
11D5T
5"
(127mm)
2"
3.536 in 3
10.630 in 4
1.50 in 2
Note: All steel available in 316 upon request.
Ladder Cable Tray System - Steel Tray
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