Product Name

Medium Steel I-Beams (Medium-Section I-Beams / Medium Wide-Flange Beams)

Introduction

Medium Steel I-Beams are medium-capacity rolled or fabricated I-section members commonly used where higher strength and stiffness than light sections are required but where the mass and cost of heavy structural girders are unnecessary. They balance structural performance, economy and ease of handling - ideal for commercial buildings, small-to-medium industrial frames, mezzanines, short-span bridges, gantries and secondary crane rails.

Typical Materials & Grades

Carbon / structural steels: S235 / Q235, S275, S355 (EN); A36, A572 Gr.50 (ASTM).

HSLA options: S420/S460 available when reduced weight or higher yield is desired.

Corrosion / specialty: weathering steel (Corten), stainless or coated options for aggressive environments.

Typical Geometries & Ranges

Section depth (h): 150 mm – 450 mm (typical medium range).

Flange width (b): 75 mm – 225 mm.

Web thickness (tw): 6 mm – 18 mm.

Flange thickness (tf): 8 mm – 30 mm.

Weight per metre: ~20 kg/m → ~120 kg/m depending on specific section.

Lengths: standard mill lengths (6 m, 12 m) or cut-to-length; spliced for longer spans.

Manufacture & Forms

Rolled wide-flange (W/I/HE) for standard medium sections.

Built-up/fabricated I-beams (welded web + flange plates) for non-standard depths or when openings/attachments are required.

Cambered or tapered variants for specific structural needs.

Finishes: mill, shot-blasted, primer coated, hot-dip galvanised or bespoke coating systems.

Mechanical Properties (typical)

Yield strength: 235 MPa → 355 MPa (grade dependent).

Design flexibility: higher section modulus and lateral stability than light sections; choose grade/section for required bending moment and shear.

Features & Advantages

Efficient stiffness-to-weight ratio for medium spans and loads.

Easier handling & installation than heavy plate girders while providing significant capacity.

Versatile fabrication: supports shop-fit openings, stiffeners, welded attachments and pre-drilled splice packs.

Cost-effective: often the best economy for floor beams, secondary rafters and light crane runways.

Good availability: many standard medium sizes are readily stocked by mills and distributors.

Typical Applications

Building primary/secondary beams for commercial and light industrial structures.

Mezzanine and platform beams.

Short-span bridge stringers and footbridges (rolling/plate girder alternatives).

Gantry & overhead runway beams for light-to-medium cranes.

Equipment support beams, conveyors and plant secondary framing.

Design & Selection Guidance

Provide span, loads (uniform + concentrated), support type and deflection limit; select section to satisfy bending (M), shear (V), deflection (Δ) and lateral torsional buckling requirements per code (Eurocode, AISC, local standard).

Consider HSLA grades to reduce weight if transportation or erection limits apply.

For crane runways, check wheel load concentration and provide local flange reinforcement or cover plates as needed.

Quality Assurance & Testing

Material certification: Mill Test Certificate (MTC) supplied with heat number traceability.

Welding & fabrication: WPS/PQR governance, qualified welders and weld records for built-up sections.

NDT: MT/UT/RT available for critical welds as specified.

Dimensional control: geometry, camber and straightness checks; coating inspection per contract.

Packaging & Delivery

Protection: timber cradles, VCI film or temporary oil for coated/galvanised items.

Marking: part IDs, orientation and splice numbers for spliced deliveries.

Transport: single-piece lengths sized to transport/cranage limits; long spans shipped as spliced kits with match-drilled splice plates.

Ordering Information - What We Need

Please supply:

Span and support conditions, dead & live loads (including any concentrated/wheel loads).

Desired steel grade and corrosion/coating requirement.

Preferred single-piece length or maximum transport/crane limits.

Any value-adds: pre-drilled holes, camber, stiffeners, weld-on pads, splice packs or surface finish.

Quantity and target delivery time; any inspection/witness needs.

Why Choose Our Medium Steel I-Beams?

We offer a wide range of standard medium sections plus built-up custom solutions, engineered for efficient performance, economical fabrication and practical on-site erection. Provide your span and loading data and we'll propose suitable rolled or built-up sections, list section properties (area, Ix, Sx), supply weights (kg/m) and a competitive quotation.

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