CHS 121x18 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 121x18 steel profile weighs 45.7 kg/m (30.72 lb/ft). Cross-sectional area: 5,824.513 mm². Moment of inertia Ix = 795.992 cm⁴, Iy = 795.992 cm⁴.
Cross-section (not to scale)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Thickness (t) | 18 mm | 0.71 in |
| Diameter (d) | 121 mm | 4.76 in |
| Weight | 45.7 kg/m | 30.72 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 5,824.51 mm² | 9.028 in² |
| Moment of inertia (Ix) | 795.99 cm⁴ | 19.12 in⁴ |
| Moment of inertia (Iy) | 795.99 cm⁴ | 19.12 in⁴ |
| Elastic section modulus (Sx) | 131.57 cm³ | 8.029 in³ |
| Elastic section modulus (Sy) | 131.57 cm³ | 8.029 in³ |
| Plastic section modulus (Zx) | 192.91 cm³ | 11.772 in³ |
| Plastic section modulus (Zy) | 192.91 cm³ | 11.772 in³ |
| Radius of gyration (rx) | 3.7 cm | 1.455 in |
| Radius of gyration (ry) | 3.7 cm | 1.455 in |
Beam Calculator— CHS 121x18
drag to orbit
mfixed @ 0mfixed @ 6m→kN/m
Results — CHS 121x18
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
10.60 mm
L/566
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
