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Channel Spec Table
Channel Specifications — 27 sizes
KS D 3502JIS G 3192
C/U-section channel steel used for beams, guide rails, and structural reinforcements.
Practical Notes
- Asymmetric cross-section — watch for torsion under load. Using paired channels face-to-face cancels torsion effects.
- For guide rail use, check inner flange squareness. Poor squareness degrades guide precision.
Selection Guide
C/U-section channel steel for beams, guide rails, and structural reinforcements. Asymmetric cross-section requires attention to load direction.
ChannelKSJISChannel
9 sizesThe dimensions below are identical across KS D 3502 · JIS G 3192.
| Nominal | H | B | t1 | t2 | Weight |
|---|---|---|---|---|---|
| C75×40 | 75 | 40 | 5 | 7 | 6.92 |
| C100×50 | 100 | 50 | 5 | 7.5 | 9.36 |
| C125×65 | 125 | 65 | 6 | 8 | 13.4 |
| C150×75 | 150 | 75 | 6.5 | 10 | 18.6 |
| C180×75 | 180 | 75 | 7 | 10.5 | 21.3 |
| C200×80 | 200 | 80 | 7.5 | 11 | 24.6 |
| C250×90 | 250 | 90 | 9 | 13 | 34.6 |
| C300×90 | 300 | 90 | 9 | 13 | 38.1 |
| C380×100 | 380 | 100 | 10.5 | 16 | 55.7 |
Key Features
- C-shaped (channel) cross-section; open on one side for pipe/cable support
- KS D 3502; 75×40–380×100 mm; SS400/SM490 material
- Asymmetric cross-section puts shear center outside web; eccentric load must be considered
Key Applications
Pipe supports, cable tray rails, machine base frames, stair side plates, signage structures
FAQ
How is channel size notation read?
C×A×tw×tf where C=height, A=width, tw=web thickness, tf=flange thickness. E.g., C100×50×5×7.5 means 100mm height, 50mm width.