Steel Pipe Columns - Allowable Loads
Allowable concentric loads for steel pipe columns
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The tables bellows indicates allowable concentric loads for steel pipe columns:
Standard Steel Pipe
| Nominal Pipe Diameter (inches) | Wall Thickness (inches) | Effective Length of Column (feet) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | ||
| Allowable Concentric Loads (103 lbf) | |||||||||
| 3 | 0.216 | 38 | 34 | 28 | 22 | 16 | 12 | 10 | |
| 3 1/2 | 0.226 | 48 | 44 | 38 | 32 | 25 | 19 | 15 | 12 |
| 4 | 0.237 | 59 | 54 | 49 | 43 | 36 | 29 | 23 | 19 |
| 5 | 0.257 | 83 | 78 | 73 | 68 | 61 | 55 | 47 | 39 |
| 6 | 0.280 | 110 | 106 | 101 | 95 | 89 | 82 | 75 | 67 |
| 8 | 0.322 | 171 | 166 | 161 | 155 | 149 | 142 | 135 | 127 |
| 10 | 0.365 | 246 | 241 | 235 | 229 | 223 | 216 | 209 | 201 |
| 12 | 0.375 | 303 | 299 | 293 | 288 | 282 | 275 | 268 | 261 |
- 1 lbf (Pound force) = 4.45 N = 0.45 kp
Extra Strong Steel Pipe
| Nominal Pipe Diameter (inches) | Wall Thickness (inches) | Effective Length of Column (feet) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | ||
| Allowable Concentric Loads (103 lbf) | |||||||||
| 3 | 0.300 | 52 | 45 | 37 | 28 | 21 | 16 | 12 | |
| 3 1/2 | 0.318 | 66 | 59 | 51 | 43 | 33 | 25 | 20 | 16 |
| 4 | 0.337 | 81 | 75 | 67 | 59 | 49 | 39 | 31 | 25 |
| 5 | 0.375 | 118 | 111 | 103 | 95 | 86 | 76 | 65 | 54 |
| 6 | 0.432 | 166 | 159 | 151 | 142 | 132 | 122 | 111 | 99 |
| 8 | 0.500 | 259 | 251 | 243 | 234 | 224 | 214 | 203 | 191 |
| 10 | 0.500 | 332 | 325 | 318 | 309 | 301 | 291 | 281 | 271 |
| 12 | 0.500 | 400 | 394 | 387 | 379 | 371 | 363 | 353 | 344 |
Note that the effective column length depends on the column configuration. The values above is valid for columns with rotation free and translation fixed in both ends.
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