CHS 121x4 GOST · Weight & Dimensions
GOST, cold-formed sections · Circular Hollow Section
Circular Hollow Sections (CHS) are round tubular profiles with the most efficient cross-section for compression. Used for columns, trusses, and architectural structures.
Also known as: Caño estructural redondo (Argentina)
The CHS 121x4 steel profile weighs 11.5 kg/m (7.75 lb/ft). Cross-sectional area: 1,470.265 mm². Moment of inertia Ix = 251.875 cm⁴, Iy = 251.875 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 4 mm ≈ 8 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Thickness (t) | 4 mm | 0.16 in |
| Diameter (d) | 121 mm | 4.76 in |
| Weight | 11.5 kg/m | 7.75 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 1,470.27 mm² | 2.279 in² |
| Moment of inertia (Ix) | 251.87 cm⁴ | 6.05 in⁴ |
| Moment of inertia (Iy) | 251.87 cm⁴ | 6.05 in⁴ |
| Elastic section modulus (Sx) | 41.63 cm³ | 2.541 in³ |
| Elastic section modulus (Sy) | 41.63 cm³ | 2.541 in³ |
| Plastic section modulus (Zx) | 54.78 cm³ | 3.343 in³ |
| Plastic section modulus (Zy) | 54.78 cm³ | 3.343 in³ |
| Radius of gyration (rx) | 4.14 cm | 1.630 in |
| Radius of gyration (ry) | 4.14 cm | 1.630 in |
Beam Calculator— CHS 121x4
drag to orbit
mfixed @ 0mfixed @ 6m→kN/m
Results — CHS 121x4
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
33.50 mm
L/179
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
