Steel Beam Sizes / CISC / HSS Rectangular / HS127×102×7.9
HS127×102×7.9 Steel Beam Dimensions and Properties
CISC Rectangular HSS · v12.1
Diagram, properties emphasis, and nearby alternatives use the selected unit system.
Section diagram
HS127×102×7.9 dimensions
Not to scale. Dimensions shown for reference.
Section properties
Symbols match the steel section finder. Imperial and metric values are shown side by side.
| Property | Imperial | Metric |
|---|---|---|
| Weight | 17.00 lb/ft | 25.20 kg/m |
| Height | 5.00 in | 127.00 mm |
| Width | 4.00 in | 101.60 mm |
| Nominal tw | 0.313 in | 7.940 mm |
| Design tw | 0.313 in | 7.940 mm |
| Area | 4.99 in² | 3,220.00 mm² |
| Ix | 16.63 in⁴ | 6,920,000 mm⁴ |
| Iy | 11.70 in⁴ | 4,870,000 mm⁴ |
| Sx | 6.65 in³ | 109,000.00 mm³ |
| Sy | 5.85 in³ | 95,900.00 mm³ |
| Zx | 8.24 in³ | 135,000.00 mm³ |
| Zy | 7.08 in³ | 116,000.00 mm³ |
| rx | 1.83 in | 46.40 mm |
| ry | 1.53 in | 38.90 mm |
| J | 22.92 in⁴ | 9,540,000 mm⁴ |
Alternatives
Useful nearby sections
Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HS127×102×7.9.
Lighter in Rectangular HSS
HA152×102×6.4
- Weight
- 23.2 kg/m (-8.2%)
- Depth
- 152.4 mm (+20%)
- Ix
- 8,450,000 mm⁴ (+22%)
Heavier in Rectangular HSS
HA203×152×4.8
- Weight
- 25.5 kg/m (+0.6%)
- Depth
- 203.2 mm (+60%)
- Ix
- 17,800,000 mm⁴ (+157%)
Closest Iₓ in Rectangular HSS
HA152×76×6.4
- Weight
- 20.7 kg/m (-18%)
- Depth
- 152.4 mm (+20%)
- Ix
- 6,890,000 mm⁴ (-0.4%)
Source: CISC Structural Section Tables SST12.1 · v12.1 · CSA G40 · Methodology