CHS 121x20 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 121x20 steel profile weighs 49.8 kg/m (33.48 lb/ft). Cross-sectional area: 6,346.017 mm². Moment of inertia Ix = 840.927 cm⁴, Iy = 840.927 cm⁴.
Cross-section (not to scale)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Thickness (t) | 20 mm | 0.79 in |
| Diameter (d) | 121 mm | 4.76 in |
| Weight | 49.8 kg/m | 33.48 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 6,346.02 mm² | 9.836 in² |
| Moment of inertia (Ix) | 840.93 cm⁴ | 20.20 in⁴ |
| Moment of inertia (Iy) | 840.93 cm⁴ | 20.20 in⁴ |
| Elastic section modulus (Sx) | 139 cm³ | 8.482 in³ |
| Elastic section modulus (Sy) | 139 cm³ | 8.482 in³ |
| Plastic section modulus (Zx) | 206.69 cm³ | 12.613 in³ |
| Plastic section modulus (Zy) | 206.69 cm³ | 12.613 in³ |
| Radius of gyration (rx) | 3.64 cm | 1.433 in |
| Radius of gyration (ry) | 3.64 cm | 1.433 in |
Beam Calculator— CHS 121x20
drag to orbit
mfixed @ 0mfixed @ 6m→kN/m
Results — CHS 121x20
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
10.03 mm
L/598
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
