AISC Round HSS: Dimensions and Section Properties
Browse AISC round hollow structural sections. Compare outside diameter, wall thickness and section properties.
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Showing AISC · HSS Round · Imperial
AISC Shapes Database v16.0 · 2,299 sections
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Showing the most relevant 75 sections.
| Designation | Weight (lb/ft) | Depth, d (in) | Width (in) | Area (in²) | Ix (in⁴) | Sx (in³) |
|---|---|---|---|---|---|---|
| HSS 28.000x0.375 | 110.74 | — | — | 30.3 | 2900 | 207 |
| HSS 28.000x0.500 | 146.99 | — | — | 40.2 | 3810 | 272 |
| HSS 28.000x0.625 | 182.9 | — | — | 50.1 | 4710 | 336 |
| HSS 28.000x0.750 | 218.48 | — | — | 59.8 | 5580 | 398 |
| HSS 28.000x0.875 | 253.72 | — | — | 69.5 | 6430 | 459 |
| HSS 28.000x1.000 | 288.63 | — | — | 79.1 | 7250 | 518 |
| HSS 26.000x0.313 | 85.81 | — | — | 23.5 | 1940 | 149 |
| HSS 26.000x0.375 | 102.73 | — | — | 28.1 | 2310 | 178 |
| HSS 26.000x0.500 | 136.3 | — | — | 37.3 | 3040 | 234 |
| HSS 26.000x0.625 | 169.54 | — | — | 46.4 | 3750 | 289 |
| HSS 26.000x0.750 | 202.44 | — | — | 55.4 | 4440 | 342 |
| HSS 24.000x0.313 | 79.13 | — | — | 21.6 | 1520 | 127 |
| HSS 24.000x0.375 | 94.71 | — | — | 25.9 | 1810 | 151 |
| HSS 24.000x0.500 | 125.61 | — | — | 34.4 | 2380 | 198 |
| HSS 24.000x0.625 | 156.18 | — | — | 42.8 | 2930 | 244 |
| HSS 24.000x0.750 | 186.41 | — | — | 51.1 | 3470 | 289 |
| HSS 24.000x0.875 | 216.31 | — | — | 59.3 | 3990 | 332 |
| HSS 24.000x1.000 | 245.87 | — | — | 67.4 | 4490 | 374 |
| HSS 22.000x0.313 | 72.45 | — | — | 19.8 | 1170 | 106 |
| HSS 22.000x0.375 | 86.69 | — | — | 23.7 | 1390 | 126 |
| HSS 22.000x0.500 | 114.92 | — | — | 31.5 | 1820 | 166 |
| HSS 22.000x0.625 | 142.81 | — | — | 39.1 | 2240 | 204 |
| HSS 22.000x0.750 | 170.37 | — | — | 46.7 | 2650 | 241 |
| HSS 20.000x0.250 | 52.78 | — | — | 14.4 | 705 | 70.5 |
| HSS 20.000x0.313 | 65.77 | — | — | 18 | 874 | 87.4 |
| HSS 20.000x0.375 | 78.67 | — | — | 21.5 | 1040 | 104 |
| HSS 20.000x0.500 | 104 | — | — | 28.5 | 1360 | 136 |
| HSS 20.000x0.625 | 129.45 | — | — | 35.5 | 1670 | 167 |
| HSS 20.000x0.750 | 154.34 | — | — | 42.3 | 1970 | 197 |
| HSS 20.000x0.875 | 178.89 | — | — | 49 | 2260 | 226 |
| HSS 20.000x1.000 | 203.11 | — | — | 55.7 | 2540 | 254 |
| HSS 18.000x0.250 | 47.44 | — | — | 13 | 512 | 56.9 |
| HSS 18.000x0.313 | 59.09 | — | — | 16.2 | 634 | 70.4 |
| HSS 18.000x0.375 | 70.66 | — | — | 19.4 | 754 | 83.8 |
| HSS 18.000x0.500 | 93.54 | — | — | 25.6 | 985 | 109 |
| HSS 18.000x0.625 | 116.09 | — | — | 31.8 | 1210 | 134 |
| HSS 18.000x0.750 | 138.3 | — | — | 37.9 | 1420 | 158 |
| HSS 18.000x0.875 | 160.19 | — | — | 43.9 | 1630 | 181 |
| HSS 18.000x1.000 | 181.73 | — | — | 49.9 | 1820 | 202 |
| HSS 16.000x0.250 | 42.09 | — | — | 11.5 | 359 | 44.8 |
| HSS 16.000x0.312 | 52.32 | — | — | 14.4 | 443 | 55.4 |
| HSS 16.000x0.375 | 62.64 | — | — | 17.2 | 526 | 65.7 |
| HSS 16.000x0.438 | 72.87 | — | — | 19.9 | 606 | 75.8 |
| HSS 16.000x0.500 | 82.85 | — | — | 22.7 | 685 | 85.7 |
| HSS 16.000x0.625 | 103 | — | — | 28.1 | 838 | 105 |
| HSS 16.000x0.750 | 122.27 | — | — | 33.5 | 984 | 123 |
| HSS 16.000x0.875 | 141.48 | — | — | 38.8 | 1120 | 140 |
| HSS 16.000x1.000 | 160.35 | — | — | 44 | 1250 | 157 |
| HSS 14.000x0.188 | 27.69 | — | — | 7.57 | 181 | 25.9 |
| HSS 14.000x0.250 | 36.75 | — | — | 10.1 | 239 | 34.1 |
| HSS 14.000x0.312 | 45.65 | — | — | 12.5 | 295 | 42.1 |
| HSS 14.000x0.375 | 54.62 | — | — | 15 | 349 | 49.8 |
| HSS 14.000x0.500 | 72.16 | — | — | 19.8 | 453 | 64.8 |
| HSS 14.000x0.625 | 89.36 | — | — | 24.5 | 552 | 78.9 |
| HSS 14.000x0.750 | 106.23 | — | — | 29.1 | 647 | 92.4 |
| HSS 14.000x0.875 | 122.77 | — | — | 33.7 | 735 | 105 |
| HSS 14.000x1.000 | 138.97 | — | — | 38.2 | 820 | 117 |
| HSS 13.375x0.188 | 26.43 | — | — | 7.23 | 158 | 23.6 |
| HSS 13.375x0.250 | 35.08 | — | — | 9.6 | 207 | 31 |
| HSS 13.375x0.313 | 43.64 | — | — | 11.9 | 256 | 38.2 |
| HSS 13.375x0.375 | 52.11 | — | — | 14.3 | 303 | 45.3 |
| HSS 13.375x0.500 | 68.82 | — | — | 18.9 | 393 | 58.8 |
| HSS 13.375x0.625 | 85.19 | — | — | 23.4 | 479 | 71.6 |
| HSS 12.750x0.188 | 25.18 | — | — | 6.89 | 136 | 21.4 |
| HSS 12.750x0.250 | 33.41 | — | — | 9.16 | 180 | 28.2 |
| HSS 12.750x0.375 | 49.61 | — | — | 13.6 | 262 | 41 |
| HSS 12.750x0.500 | 65.48 | — | — | 17.9 | 339 | 53.2 |
| HSS 12.750x0.625 | 81.01 | — | — | 22.2 | 412 | 64.7 |
| HSS 12.750x0.750 | 96.21 | — | — | 26.4 | 481 | 75.5 |
| HSS 12.000x0.250 | 31.4 | — | — | 8.6 | 149 | 24.8 |
| HSS 12.000x0.375 | 46.6 | — | — | 12.8 | 217 | 36.1 |
| HSS 12.000x0.500 | 61.47 | — | — | 16.9 | 281 | 46.8 |
| HSS 12.000x0.625 | 76 | — | — | 20.9 | 341 | 56.8 |
| HSS 11.750x0.250 | 30.73 | — | — | 8.41 | 140 | 23.8 |
| HSS 11.750x0.337 | 41.12 | — | — | 11.3 | 184 | 31.4 |
Family overview
What are AISC HSS Round?
AISC round HSS are circular hollow sections used for columns, braces and architectural members. Designations list outside diameter × nominal thickness, with design thickness used for published properties. Round HSS differ from pipe designations even when diameters look similar—compare the specified product series. This hub filters the finder to round HSS for comparison, charts and calculator handoff.
Designations
Understanding HSS Round designations
HSS5.563×0.258
Round HSS designations list outside diameter × nominal thickness. Use design thickness for property-based calculations unless the specification says otherwise.
Nominal depth series
Browse by series
Use these series labels to filter the finder table above.
Properties
HSS Round properties explained
These properties are especially relevant when comparing HSS Round. View the complete property glossary.
| Symbol | Property | Units | Why it matters |
|---|---|---|---|
| Weight | Weight | lb/ft, kg/m | Mass per unit length; used for self-weight and economy comparisons |
| OD | Outside diameter | in, mm | Outside diameter for pipe and round HSS |
| tw (Nominal) | Nominal wall thickness | in, mm | Published nominal wall thickness from the shape designation |
| tw (Design) | Design wall thickness | in, mm | Reduced wall thickness used for published design properties |
| A | Cross-sectional area | in², mm² | Total steel cross-sectional area |
| Ix | Moment of inertia (x) | in⁴, mm⁴ | Major-axis flexural stiffness |
| Iy | Moment of inertia (y) | in⁴, mm⁴ | Minor-axis flexural stiffness |
| Sx | Elastic section modulus (x) | in³, mm³ | Elastic bending property about the x-axis |
| Sy | Elastic section modulus (y) | in³, mm³ | Elastic bending property about the y-axis |
| Zx | Plastic section modulus (x) | in³, mm³ | Plastic bending property about the x-axis |
| Zy | Plastic section modulus (y) | in³, mm³ | Plastic bending property about the y-axis |
| rx | Radius of gyration (x) | in, mm | Strong-axis radius of gyration |
| ry | Radius of gyration (y) | in, mm | Weak-axis radius of gyration and lateral stability relevance |
| J | Torsional constant | in⁴, mm⁴ | Torsional constant |
Library summary
Computed HSS Round summary
The current AISC HSS Round library contains 189 sections across 1 nominal-depth series. Published weights range from 2.27 to 288.63 lb/ft , and actual depths range from 1.66 to 28.00 inches .
- Lightest section
- HSS1.660X0.140
- Heaviest section
- HSS28.000X1.000
- Ix range
- 0.18 – 7,250.00 in⁴
- Sx range
- 0.22 – 518.00 in³
Selection
How to compare HSS Round
- Confirm round HSS versus pipe in the project specification.
- Compare outside diameter and wall thickness carefully.
- Review rx and Ix for compression or bending use cases.
- Use design thickness when reading published properties.
Beam calculator
Analyze this family in Optimal Beam
Select any round HSS and load it into the Optimal Beam calculator.
Source: AISC Shapes Database v16.0 · Verified July 2026 · View methodology
Questions & answers
HSS Round FAQs
How are round HSS designated?
They list outside diameter × nominal thickness. Always confirm whether the project specifies round HSS or pipe.
How do round HSS differ from pipe?
They are different product families with different designation systems and published conventions. Do not treat labels as interchangeable.
What is design thickness for round HSS?
Design thickness is smaller than nominal wall thickness and is used for published design properties.
Can I analyze round HSS in Optimal Beam?
Yes. Select the section and choose Analyze.