Steel Section Catalog
C 75x40x15x4.75
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.
Also known as: Montén de 3 pulgadas (México) · PFC 75x40x15x4.75 (UK / Australia)
The C 75x40x15x4.75 steel profile weighs 8.2 kg/m (5.51 lb/ft), has a depth of 75 mm (2.95 in), flange width 40 mm (1.57 in). Cross-sectional area: 788.5 mm². Moment of inertia Ix = 65.22 cm⁴, Iy = 15.84 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 4.75 mm ≈ 7 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 75 mm | 2.95 in |
| Width (b) | 40 mm | 1.57 in |
| Thickness (t) | 4.8 mm | 0.19 in |
| Lip | 15 mm | 0.59 in |
| Weight | 8.2 kg/m | 5.51 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 788.5 mm² | 1.222 in² |
| Moment of inertia (Ix) | 65.22 cm⁴ | 1.57 in⁴ |
| Moment of inertia (Iy) | 15.84 cm⁴ | 0.38 in⁴ |
| Elastic section modulus (Sx) | 17.39 cm³ | 1.061 in³ |
| Elastic section modulus (Sy) | 5.84 cm³ | 0.356 in³ |
| Plastic section modulus (Zx) | 20 cm³ | 1.220 in³ |
| Plastic section modulus (Zy) | 7 cm³ | 0.427 in³ |
| Radius of gyration (rx) | 2.88 cm | 1.134 in |
| Radius of gyration (ry) | 1.42 cm | 0.559 in |
Beam Calculator— C 75x40x15x4.75
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mfixed @ 0mfixed @ 6m→kN/m
Results — C 75x40x15x4.75
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
129.37 mm
L/46
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
