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When selecting and preparing ‘C’ section beams for your project, understanding the surface area per foot of length and per ton of weight is crucial. Below is a detailed chart for various ‘C’ section beams, including calculations for surface area with or without one flange side.
| Section Designation | Square Feet of Surface Area per Foot of Length | Square Feet of Surface Area per Ton | |||
 |
|
||||
| Minus one flange side | All around | Minus one flange side | All around | ||
| C-15 |
x 50
|
3.44 | 3.75 | 137.6 | 150.0 |
|
x 40
|
3.38 | 3.67 | 169.0 | 183.5 | |
|
x 33.9
|
3.34 | 3.63 | 197.1 | 214.2 | |
| C-12 |
x 30
|
2.78 | 3.04 | 185.3 | 202.7 |
|
x 25
|
2.75 | 3.00 | 220.0 | 240.0 | |
|
x 20.7
|
2.75 | 3.00 | 265.7 | 289.9 | |
| C-10 |
x 30
|
2.42 | 2.67 | 161.3 | 178.0 |
|
x 25
|
2.39 | 2.63 | 191.2 | 210.4 | |
|
x 20
|
2.35 | 2.58 | 235.0 | 258.0 | |
|
x 15.3
|
2.32 | 2.54 | 305.3 | 334.2 | |
| C-9 |
x 20
|
2.16 | 2.38 | 216.0 | 238.0 |
|
x 15
|
2.13 | 2.33 | 284.0 | 310.7 | |
|
x 13.4
|
2.09 | 2.29 | 311.9 | 341.8 | |
| C-8 |
x 18.75
|
1.96 | 2.17 | 209.1 | 231.5 |
|
x 13.75
|
1.93 | 2.13 | 280.7 | 309.8 | |
|
x 11.5
|
1.90 | 2.08 | 330.4 | 361.7 | |
| C-7 |
x 14.75
|
1.73 | 1.92 | 234.6 | 260.3 |
|
x 12.25
|
1.73 | 1.92 | 282.4 | 313.5 | |
|
x 9.8
|
1.70 | 1.88 | 346.9 | 383.7 | |
| C-6 |
x 13
|
1.53 | 1.71 | 235.4 | 263.1 |
|
x 10.5
|
1.50 | 1.67 | 285.7 | 318.1 | |
|
x 8.2
|
1.47 | 1.63 | 358.5 | 397.6 | |
| C-5 |
x 9
|
1.30 | 1.46 | 288.9 | 324.4 |
|
x 6.7
|
1.27 | 1.42 | 379.1 | 423.9 | |
| C-4 |
x 7.25
|
1.10 | 1.25 | 295.2 | 344.8 |
|
x 5.4
|
1.07 | 1.21 | 396.3 | 448.1 | |
| C-3 |
x 6
|
0.91 | 1.04 | 303.3 | 346.7 |
|
x 5
|
0.88 | 1.00 | 352.0 | 400.0 | |
|
x 4.1
|
0.84 | 0.96 | 409.8 | 468.3 | |
| MC-18 |
x 58
|
4.06 | 4.42 | 140.0 | 152.4 |
|
x 51.9
|
4.03 | 4.38 | 155.3 | 168.8 | |
|
x 45.8
|
4.00 | 4.33 | 176.7 | 189.1 | |
|
x 42.7
|
4.00 | 4.33 | 187.4 | 202.8 | |
| MC-13 |
x 50
|
3.26 | 3.63 | 130.4 | 145.2 |
|
x 40
|
3.20 | 3.54 | 160.0 | 177.0 | |
|
x 35
|
3.20 | 3.54 | 182.9 | 202.3 | |
|
x 31.8
|
3.17 | 3.50 | 199.4 | 220.1 | |
| MC-12 |
x 50
|
3.03 | 3.38 | 121.2 | 135.2 |
|
x 45
|
3.00 | 3.33 | 133.3 | 148.0 | |
|
x 40
|
2.97 | 3.29 | 148.5 | 164.5 | |
|
x 35
|
2.94 | 3.25 | 168.0 | 185.7 | |
|
x 37
|
2.91 | 3.21 | 157.3 | 173.5 | |
|
x 32.9
|
2.88 | 3.17 | 175.1 | 192.7 | |
|
x 30.9
|
2.88 | 3.17 | 186.4 | 205.2 | |
| MC-10 |
x 41.1
|
2.76 | 3.13 | 134.3 | 152.3 |
|
x 33.6
|
2.70 | 30.4 | 160.7 | 181.0 | |
|
x 28.5
|
2.67 | 3.00 | 187.4 | 210.5 | |
|
x 28.3
|
2.54 | 2.83 | 179.5 | 200.0 | |
|
x 25.3
|
2.54 | 2.83 | 200.8 | 223.7 | |
|
x 24.9
|
2.51 | 2.79 | 201.6 | 224.1 | |
|
x 21.9
|
2.54 | 2.83 | 232.0 | 258.4 | |
| MC-9 |
x 25.4
|
2.38 | 2.67 | 187.4 | 210.2 |
|
x 23.9
|
2.38 | 2.67 | 199.2 | 223.4 | |
| MC-8 |
x 22.8
|
2.21 | 2.50 | 193.9 | 219.3 |
|
x 21.4
|
2.21 | 2.50 | 206.5 | 233.6 | |
|
x 20
|
2.08 | 2.33 | 208.0 | 233.0 | |
|
x 18.7
|
2.08 | 2.33 | 222.5 | 249.2 | |
| MC-7 |
x 22.7
|
2.07 | 2.38 | 182.4 | 209.7 |
|
x 19.1
|
2.04 | 2.33 | 213.6 | 244.0 | |
|
x 17.6
|
1.92 | 2.17 | 218.2 | 246.6 | |
| MC-6 |
x 18
|
1.88 | 2.17 | 208.9 | 241.1 |
|
x 15.3
|
1.88 | 2.17 | 245.8 | 283.7 | |
|
x 16.3
|
1.75 | 2.00 | 214.7 | 245.4 | |
|
x 15.1
|
1.75 | 2.00 | 231.8 | 264.9 | |
|
x 12
|
1.63 | 1.83 | 271.7 | 305.0 | |
| MC-3 |
x 9
|
1.03 | 1.21 | 228.9 | 268.9 |
|
x 7.1
|
1.00 | 1.17 | 281.7 | 329.6 | |
DISCLAIMER: All and any tables, calculations, factors, formulas, etc ‘information’ on any of these pages are a guide only and shall not be taken as either the approved nor standard nor complying method nor formula nor calculation for any of the topics or aspects referred to, and neither is any claim made as to the completeness or accuracy of the ‘information’. It is the responsibility of the reader and/or users of this information to separately determine and verify the correct method, formula, factor, procedure, data, etc. for determining any such topics or aspects as directed or required or indicated in or by any work specifications and/or standards. Blast-One™ expressly disclaims any liability for the use or misuse of the ‘information’.
