Steel Section Catalog
C 300x85x25x4.25
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 300x85x25x4.25 steel profile weighs 24.5 kg/m (16.48 lb/ft), has a depth of 300 mm (11.81 in), flange width 85 mm (3.35 in). Cross-sectional area: 2,137.8 mm². Moment of inertia Ix = 2,779.98 cm⁴, Iy = 188.02 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 4.25 mm ≈ 8 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 300 mm | 11.81 in |
| Width (b) | 85 mm | 3.35 in |
| Thickness (t) | 4.3 mm | 0.17 in |
| Lip | 25 mm | 0.98 in |
| Weight | 24.5 kg/m | 16.48 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 2,137.8 mm² | 3.314 in² |
| Moment of inertia (Ix) | 2,779.98 cm⁴ | 66.79 in⁴ |
| Moment of inertia (Iy) | 188.02 cm⁴ | 4.52 in⁴ |
| Elastic section modulus (Sx) | 185.33 cm³ | 11.310 in³ |
| Elastic section modulus (Sy) | 29.06 cm³ | 1.773 in³ |
| Plastic section modulus (Zx) | 213.13 cm³ | 13.006 in³ |
| Plastic section modulus (Zy) | 34.88 cm³ | 2.129 in³ |
| Radius of gyration (rx) | 11.4 cm | 4.488 in |
| Radius of gyration (ry) | 2.97 cm | 1.169 in |
Beam Calculator— C 300x85x25x4.25
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mfixed @ 0mfixed @ 6m→kN/m
Results — C 300x85x25x4.25
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
3.04 mm
L/1977
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
