Profile Section

380x88x2.5mm S350GD+Z Galvanized Steel Sigma Plus Profile

The 380x88x2.5mm steel Sigma Plus profile is a cold roll-formed Σ+ section to EN 10162 with a deep stiffened 380 mm web, 88 mm flanges, fixed 25+15 mm double lips and 2.5 mm sheet thickness, weighing a nominal 13.04 kg/m. Produced to order in galvanized S350GD+Z steel, the Sigma+ indent and double lips raise buckling resistance for heavy purlins, columns and long-span structures. This variant is pre-galvanized structural strip S350GD+Z275 to EN 10346, minimum yield about 350 MPa. The zinc coating is already on the coil, which is why this is the standard grade for outdoor purlins and solar structures.

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Made to Order — Roll Formed

This profile is roll-formed to order in your exact length (1–15 m; longer on project basis). Minimum production run is approx. 3000 kg per size and grade. Add your sizes to a quote request and our team confirms lead time and pricing within one business day.

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Quantity (pieces)

Minimum order: 20 pieces

Minimum total length: 234 m

Weight per meter:13.037 kg/m

Total length:12 meters

Total weight:156.444 kg

Production options

Optional made-to-order requirements — added to this line for our production team.

Coating weight

Pre-painted finish (RAL)Punching / holes to drawingMill certificate EN 10204 3.1

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Applications & Usage

Sigma+ 380x88x2.5 is the weight-optimized choice for heavy purlins, columns and long-span rafters where a standard Sigma or C is not enough. The deep web indent and double lips allow thinner material for the same performance, cutting steel cost and foundation loads on industrial and agricultural buildings. S350GD+Z275 is the usual specification for solar mounting, roof and wall purlins, and any outdoor structure that needs a structural yield plus a zinc coating from the mill. At a nominal 13.04 kg/m and cut-to-length production from 1 to 15 m, material usage is optimized with no offcuts on site. Minimum production run is approximately 3000 kg per size and grade — add your sizes to a quote request and our team confirms exact tonnage, lead time and delivered pricing.

Technical Specifications

Specification	Value
Dimensions	380mm × 88mm × 2.5mm
Weight per Meter	13.037 kg/m
Material	Steel
Alloy/Grade	S350GD+Z275
Standard	EN 10162 / EN 10346
Profile Type	Sigma Plus (Σ+)
Edge Lip (c)	25+15 mm
Developed Width	≈ 664 mm
Cross-Section Area	≈ 16.61 cm²
Moment of Inertia Iₓ	≈ 3339.0 cm⁴
Moment of Inertia Iᵧ	≈ 166.3 cm⁴
Section Modulus Wₑₗ,ₓ	≈ 174.59 cm³
Section Modulus Wₑₗ,ᵧ	≈ 25.91 cm³
Minimum Production Run	3 t
Finish	S350GD+Z Galvanized
Available Lengths	6m, 12m
Standard Length	6 m
Minimum Order Length	234 m
Cut-to-Length Range	1000 – 15000 mm

Indicative elastic section properties computed from the nominal centerline (thin-walled, corner radii ignored). For preliminary sizing only — not a substitute for a stamped structural calculation.

Indicative load span (single span, simply supported)

Allowable uniformly-distributed load (kN/m) limited by elastic bending about the strong axis (γ = 1.5 on yield, S350GD+Z275). Deflection is not checked and usually governs long spans. Indicative only — confirm with a project calculation.