Steel Section Catalog
C 75x40x15x3.05
BR — Cold-formed Lipped Channel
Cold-formed lipped channels (C shapes) are lightweight profiles commonly used as purlins, girts, and light framing members. The stiffening lips increase local buckling resistance. Designed per AISI S100 and NBR 14762.
The C 75x40x15x3.05 steel profile weighs 5.3 kg/m (3.54 lb/ft), has a depth of 75 mm (2.95 in), flange width 40 mm (1.57 in). Cross-sectional area: 527 mm². Moment of inertia Ix = 45.81 cm⁴, Iy = 11.66 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 3.05 mm ≈ 11 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 75 mm | 2.95 in |
| Width (b) | 40 mm | 1.57 in |
| Thickness (t) | 3.0 mm | 0.12 in |
| Lip | 15 mm | 0.59 in |
| Weight | 5.3 kg/m | 3.54 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 527 mm² | 0.817 in² |
| Moment of inertia (Ix) | 45.81 cm⁴ | 1.10 in⁴ |
| Moment of inertia (Iy) | 11.66 cm⁴ | 0.28 in⁴ |
| Elastic section modulus (Sx) | 12.21 cm³ | 0.745 in³ |
| Elastic section modulus (Sy) | 4.43 cm³ | 0.270 in³ |
| Plastic section modulus (Zx) | 14.05 cm³ | 0.857 in³ |
| Plastic section modulus (Zy) | 5.31 cm³ | 0.324 in³ |
| Radius of gyration (rx) | 2.95 cm | 1.161 in |
| Radius of gyration (ry) | 1.49 cm | 0.587 in |
Beam Calculator— C 75x40x15x3.05
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mfixed @ 0mfixed @ 6m→kN/m
Results — C 75x40x15x3.05
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
184.18 mm
L/33
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
