CHS 121x3 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 121x3 steel profile weighs 8.7 kg/m (5.87 lb/ft). Cross-sectional area: 1,112.124 mm². Moment of inertia Ix = 193.69 cm⁴, Iy = 193.69 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Thickness (t) | 3 mm | 0.12 in |
| Diameter (d) | 121 mm | 4.76 in |
| Weight | 8.7 kg/m | 5.87 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 1,112.12 mm² | 1.724 in² |
| Moment of inertia (Ix) | 193.69 cm⁴ | 4.65 in⁴ |
| Moment of inertia (Iy) | 193.69 cm⁴ | 4.65 in⁴ |
| Elastic section modulus (Sx) | 32.01 cm³ | 1.954 in³ |
| Elastic section modulus (Sy) | 32.01 cm³ | 1.954 in³ |
| Plastic section modulus (Zx) | 41.78 cm³ | 2.550 in³ |
| Plastic section modulus (Zy) | 41.78 cm³ | 2.550 in³ |
| Radius of gyration (rx) | 4.17 cm | 1.643 in |
| Radius of gyration (ry) | 4.17 cm | 1.643 in |
Beam Calculator— CHS 121x3
drag to orbit
mfixed @ 0mfixed @ 6m→kN/m
Results — CHS 121x3
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
43.56 mm
L/138
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
