A channel section is a trough-shaped profile, which consists of a web and two flanges. Therefore the main characteristic of a channel section profile is the size defining height. Meanwhile there is two types of channel section:
Standard channel sections with slopping inner edges (up to 10 %) and parallel edges are manufactured in compliance with all-Union State Standard 8240.
Thin-web channel sections with narrow parallel flanges are rolled under 14-2-204-76 Engineering Specifications.
Manufacturing
Channels can be produced using section rolling mills or structural mills subject to size, profile design features and required power. For small and medium channel sections manufacturing (from Nr.6 to Nr.30) can be used linear, successive, semi continuous and continuous section rolling mills with roll diameter from 300 to 650 mm.
Channel Standards
Dimensions: DIN 10261 – 1 : 2000, NF A45202 (1983)
Tolerances: EN 10279 : 2000
| Nr. | G (kg/m) | b | h | s | t=R1 | R2 | e |
| UPN 80 | 8,64 | 45 | 80 | 6,0 | 8,0 | 4,0 | 14,5 |
| UPN 100 | 10,6 | 50 | 100 | 6,0 | 8,5 | 4,5 | 15,5 |
| UPN 120 | 13,4 | 55 | 120 | 7,0 | 9,0 | 4,5 | 16 |
| UPN 140 | 16,0 | 60 | 140 | 7,0 | 10,0 | 5,0 | 17,5 |
| UPN 160 | 18,8 | 65 | 160 | 7,5 | 10,5 | 5,5 | 18,4 |
| UPN 180 | 22,0 | 70 | 180 | 8,0 | 11,0 | 5,5 | 19,2 |
| UPN 200 | 25,3 | 75 | 200 | 8,5 | 11,5 | 6,0 | 20,1 |
| UPN 220 | 29,4 | 80 | 220 | 9,0 | 12,5 | 6,5 | 21,4 |
| UPN 240 | 33,2 | 85 | 240 | 9,5 | 13,0 | 6,5 | 22,3 |
| UPN 260 | 37,9 | 90 | 260 | 10,0 | 14,0 | 7,0 | 23,6 |
| UPN 280 | 41,8 | 95 | 280 | 10,0 | 15,0 | 7,5 | 25,3 |
| UPN 300 | 46,2 | 100 | 300 | 10,0 | 16,0 | 8,0 | 27,0 |
| Nr. | G (kg/m) | h | b | s | t | R | r |
| Nr. 6,5 | 5,90 | 65 | 36 | 4,4 | 7,2 | 6,0 | 2,5 |
| Nr. 8 (UE 80) | 7,05 | 80 | 40 | 4,5 | 7,4 | 6,5 | 2,5 |
| Nr. 10 (UE100) | 8,59 | 100 | 46 | 4,5 | 7,6 | 7,0 | 3,0 |
| Nr. 12 (UE120) | 10,40 | 120 | 52 | 4,8 | 7,8 | 7,5 | 3,0 |
| Nr. 14 (UE140) | 12,30 | 140 | 58 | 4,9 | 8,1 | 8,0 | 3,0 |
| Nr. 16 (UE160) | 14,20 | 160 | 64 | 5,0 | 8,4 | 8,5 | 3,5 |
| Nr. 18 (UE180) | 16,30 | 180 | 70 | 5,1 | 8,7 | 9,0 | 3,5 |
| Nr. 20 (UE200) | 18,40 | 200 | 76 | 5,2 | 9,0 | 9,5 | 4,0 |
| Nr. 22 (UE220) | 21,00 | 220 | 82 | 5,4 | 9,5 | 10,0 | 4,0 |
| Nr. 24 (UE240) | 24,00 | 240 | 90 | 5,6 | 10,0 | 10,5 | 4,0 |
| Nr. 27 (UE270) | 27,70 | 270 | 95 | 6,0 | 10,5 | 11,0 | 4,5 |
| Nr. 30 (UE300) | 31,80 | 300 | 100 | 6,5 | 11,0 | 12,0 | 5,0 |