Customizable Long-Span H-Section Beam

Our structural steel H-section beams are precision-engineered for industrial workshops, warehouses, bridges and high-rise buildings - delivering maximum column-free clear spans with superior bending resistance. With 20 years of steel fabrication experience, we supply both hot-rolled standard sections and custom-welded built-up beams, tailored to your exact project requirements.

Every beam is fabricated in our ISO 9001 certified factory using CNC equipment, ensuring ±2mm dimensional tolerance and 100% bolt-up accuracy on site. Whether you need a 200-ton warehouse frame or custom heavy-duty crane girders, our engineering team provides free material selection support to optimize your steel consumption and total project cost.

Long-span H-beam roof beams are horizontal structural members with an H-shaped cross-section used to carry roof loads across wide bays without intermediate columns. The wide flanges and vertical web place steel exactly where bending and shear stresses are highest, giving the beam a high strength-to-weight ratio.

Two manufacturing routes are common:

 Hot-rolled H-beams - produced as one continuous piece at a steel mill in standard sizes (e.g., W, HP, UB sections).

 Welded (built-up) H-beams - fabricated from cut steel plates by submerged-arc welding (SAW), allowing any depth, width, thickness or taper.

For long-span roofs, the choice between rolled and welded usually depends on span, load, schedule and total-project cost.

Choose rolled H-beams if your project uses standard sections, spans under about 18 m and needs fast delivery.

Choose welded built-up H-beams when the span exceeds 30 m, loads are heavy (crane runway, seismic or snow), or the section must be tapered or non-standard.

Quick Decision Guide

 Pick rolled H-beams if: span ≤ 18 m, standard section fits, budget is tight, delivery must be within 1–2 weeks.

 Pick welded H-beams if: span > 30 m, heavy crane or seismic load, non-standard depth/width, or tapered PEB profile is required.

 Hybrid approach: Use rolled sections for purlins and secondary frames; use welded built-up sections only for primary roof girders. This often saves 10–20% on total steel cost while keeping structural performance where it matters.

1. Exceptional Bending Resistance

Designed for primary load-bearing, H-beam beams provide 20% higher flexural strength than standard I-sections of the same weight, allowing for shallower beam depths.

2. Extended Spans & Material Savings

Supports clear spans of 12m to 40m+. This high efficiency reduces the "dead load" on columns and foundations, cutting total steel consumption by 15-25%.

3. High-Performance Joint Reliability 

Parallel flanges facilitate high-strength bolting for Moment Connections, ensuring over 95% load transfer efficiency between beams and columns.

4. Optimized Building Space

Due to its superior load-to-weight ratio, H-beam beams can reduce total building height by 5-10%, leading to significant savings in cladding and HVAC costs.

5. Precision Pre-Engineered Fabrication

Every beam is prefabricated in a controlled factory environment, ensuring ±2mm dimensional tolerance and significantly faster onsite hoisting and installation.

 Steel warehouses & logistics centers - long, column-free bays for racking and vehicle movement.

 Industrial workshops & manufacturing plants - primary roof girders and crane runway beams.

 Aircraft hangars & exhibition halls - very wide spans with minimum internal structure.

 Commercial & retail buildings - open floor plans and fast erection.

 Bridge & infrastructure projects - approach spans, pipe racks and support structures.

 Livestock & agricultural buildings - including PV cattle sheds and barns where corrosion protection matters.

Every beam is fabricated under controlled factory conditions so dimensional accuracy and weld quality are repeatable from the first piece to the last.

CNC Multi-head Flame Cutting

Cutting raw steel plates into web and flange strips according to design specifications using multi-head CNC flame cutters for high efficiency and consistency.

H-Beam Assembly & Tack Welding

Positioning and aligning the web and flange plates using an assembly machine, followed by tack welding to form the preliminary H-shape.

Automatic Gantry Submerged Arc Welding

Performing deep-penetration welding on the four primary seams using automatic gantry submerged arc welding (SAW) to ensure maximum structural integrity.

Flange Straightening

Correcting thermal deformation of the flanges caused by the welding heat using a hydraulic straightening machine to restore flatness and angular accuracy.

CNC Structural Drilling

Drilling high-precision bolt holes into the finished sections using CNC drilling machines to ensure perfect alignment during onsite bolting.

 

Dimensional Inspection & Quality Control

Conducting final measurements of length, span, hole alignment, and verticality to ensure the member complies with design tolerances and QC standards.

Roof beams in coastal, humid or chemically exposed environments need more than mill scale. We offer three finish levels:

 Shot blasting to Sa 2.5 - prepares the surface for paint or HDG and removes mill scale.

 Shop primer / paint system - choose alkyd, epoxy or polyurethane systems to match the project specification.

 Hot-dip galvanizing (HDG) - in-house galvanizing bath with controlled zinc coating thickness (galvanized to EN ISO 1461 / ASTM A123) for long-term corrosion resistance.

Galvanized H-beams are commonly specified for port facilities, chemical plants, livestock buildings and marine-edge structures where maintenance access is difficult.
 

Use the table below for preliminary estimating. Final selection must follow your structural engineer's load and deflection calculations.

Theoretical weight formula (kg/m): W ≈ 0.00785 × [ t₁(H − 2t₂) + 2B·t₂ + 0.858r² ], dimensions in mm - H = section depth, B = flange width, t₁ = web thickness, t₂ = flange thickness, r = fillet radius. The 0.858r² term accounts for the fillet. Values in the table already include the fillet and follow standard hot-rolled H-beam section tables (JIS G3192 / GB/T 11263).

Note:dimensions and weights follow standard hot-rolled H-beam section tables (JIS G3192 / GB/T 11263); W, HP, UB and HEA/HEB equivalents are available on request.

Selecting an H-beam roof beam comes down to four project variables. Get these right before requesting a quote and you will receive a faster, more accurate proposal.

Information to Confirm Before Production

GNEE supplies H-beam roof beams that match international design codes and project specifications from inquiry to shipment. Our focus is on getting the details right-so your fabrication packs, connection drawings and delivery schedule fit the site from day one.

 Code compliance - designed to AISC 360 and Eurocode 3; fabricated to AWS D1.1 / EN ISO 3834 welding quality requirements.

 Material traceability - mill test certificate (MTC) provided with every shipment.

 Third-party inspection - SGS, BV or equivalent inspection available on request.

 In-house capabilities - CNC cutting, drilling, welding, pre-assembly and hot-dip galvanizing under one roof.

 Drawing support  - shop-detail development and connection optimization for faster approval.

 Export packaging - sea-worthy bundling and loading for container, flat-rack and bulk shipment.

Scientific stacking - wooden dunnage separates beams to prevent metal-to-metal contact and deformation.

Secure lashing - high-tensile ratchet straps hold bundles for long-haul road and ocean transport.

Edge & surface protection - padding on edges and flanges minimizes paint or zinc damage.

Hole and joint shielding - bolt holes and flange faces are protected to ensure 100% site fit-up.

Weather-proof tagging - each bundle is tagged with heat number, grade, dimensions and weight for rapid receiving.

Lead time & shipping schedule: Hot-rolled standard sections ship in 7–15 days from stock; welded built-up beams require 15–30 days after drawing approval. We confirm booking, ETD and ETA with the freight forwarder and issue the packing list and bill of lading under the agreed Incoterms (EXW, FOB, CIF or CFR).

Note:Loading is optimized for container, flat-rack or bulk vessel depending on beam length and quantity.

FAQ:

What is the maximum span of an H-beam roof beam without columns?

Welded built-up H-beams can deliver clear spans of 40 m or more. Hot-rolled sections are practical up to about 18 m. Final span depends on load, deflection limits and the applicable design code.

Rolled or welded H-beam - which should I use?

Choose rolled H-beams for light-to-medium loads and fast delivery. Choose welded built-up H-beams for spans over 30 m, heavy crane loads or non-standard sections. Hybrid projects use rolled for secondary frames and welded for primary girders.

What is the standard length of H beam steel?

Standard stock lengths are typically 6m, 9m, and 12m. Some mills also produce 15m and 18m lengths. For custom welded H-beams, length is completely customizable - we can manufacture up to 30m+ in one piece, subject to transportation limits. We can also cut to your exact required length to minimize waste on site. For container shipping, 12m pieces fit into 40HQ containers, while longer pieces require bulk vessel or flat-rack shipping.

Do you provide drilling and fabrication services?

Yes, we offer complete value-added fabrication services including: CNC drilling (3-axis), end plate welding, stiffener plate welding, connection plate fabrication, edge grooving, notching, cambering, and pre-assembly. All fabrication is done in-factory with ±2mm precision, so beams arrive on site ready for bolted connection - no on-site cutting or welding needed, significantly reducing installation time and labor costs. We can also do trial assembly of complex joints before shipping to ensure perfect fit-up.

Do you provide mill test certificates and third-party inspection?

Every order ships with a mill test certificate (MTC). Third-party inspection by SGS, BV or another agency can be arranged on request.