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The entire welded assembly is immersed in 450°C molten zinc as one complete unit. Every weld seam, bolt hole, end plate edge, and internal surface receives the full 85–200 μm zinc-iron alloy coating. No spray-paint shortcuts, no post-galvanizing touch-ups. Outdoor steel buildings stay rust-free for 20+ years at 70% lower lifecycle cost than painted alternatives.
Thick rectangular end plates are welded to both ends of every beam in our precision jigs before galvanizing. Each plate comes with four precisely positioned bolt holes matching your connection design. On site, crews lift, align, and bolt — no field drilling, no on-site welding, no alignment errors. Portal frame erection time is cut by 50% versus traditional stick-built methods.
Factory-welded end plates with full-perimeter fillet welds create true rigid connections at every beam-to-column joint. Each bolted node transfers bending moment, shear, and axial force as one continuous structural unit. The result is a stable, sway-resistant portal frame that meets GB 50017 strength and stiffness requirements using fewer bracing members than pinned-connection alternatives.
For portal frame rafters, we fabricate tapered welded H-beams with web depth varying along the span to match the bending moment diagram. The beam is deepest at the knee (maximum negative moment) and shallowest at the apex (minimum moment). This material-optimized design uses 15–25% less steel than constant-section beams for the same load — reducing both material cost and foundation loads.
Beyond primary welded H-beams, we deliver the full structural package: C/Z cold-formed purlins and wall girts, corrugated metal roof and wall panels, cross bracing rods with turnbuckles, insulation layers, and all connection bolts. Single-source supply eliminates multi-vendor coordination, ensures material compatibility, and gives you one point of accountability for the entire steel structure.
TYNE TIANJIN supplies complete hot-dip galvanized welded steel beams for portal frame buildings — the most widely used structural system for factories, warehouses, workshops, and commercial steel buildings.
Every beam is fabricated from certified carbon steel plate with factory-welded end plates and pre-drilled bolt holes, then fully hot-dip galvanized for decades of corrosion-free service.
From primary H-beam columns and rafters to secondary C/Z purlins and corrugated metal cladding, we deliver the complete structural package — one supplier, one responsibility.
| Component | Type | Role in Structure |
|---|---|---|
| Primary Beams (Rafters) | Welded H-beam — constant or tapered section | Roof load-bearing members spanning between columns |
| Primary Columns | Welded H-beam or hot-rolled H-section | Vertical load-bearing members transferring roof loads to foundations |
| End Plates | Factory-welded rectangular plate with 4 bolt holes | Rigid bolted beam-to-column and beam-to-beam connections |
| Roof Purlins | C/Z section cold-formed galvanized steel | Secondary members supporting roof cladding between rafters |
| Wall Girts | C/Z section cold-formed galvanized steel | Secondary members supporting wall cladding between columns |
| Roof Panels | Corrugated galvanized/color-coated metal sheet | Weather-proof building envelope |
| Wall Panels | Corrugated galvanized/color-coated metal sheet | Vertical building envelope |
| Cross Bracing | Steel rod or angle with turnbuckle | Lateral stability and wind resistance |
| Insulation | Glass wool / rock wool / rigid PU foam | Thermal insulation layer under roof and wall panels |
The entire welded beam assembly is immersed in a 430–450°C molten zinc bath after all fabrication is complete. This forms a metallurgically bonded zinc-iron alloy coating (85–200 μm) on every surface — including weld seams, bolt holes, and plate edges. Unlike spray-painted steel that shows rust in 1–3 years, hot-dip galvanized beams deliver 20+ years of maintenance-free outdoor service at 70% lower lifecycle cost. GB/T 13912 and ISO 1461 compliant.
Thick rectangular end plates are welded to both ends of every beam in our factory jigs before galvanizing. Each plate is pre-drilled with precisely positioned bolt holes. On site, crews simply lift the beam, align the end plates with column connection plates, and insert bolts. No field drilling, no on-site welding, no alignment guesswork. This eliminates the single largest source of construction delays and quality variability in steel building projects.
Portal frame buildings rely on rigid (moment-resisting) connections between beams and columns to resist both vertical and lateral loads without extensive bracing. Our factory-welded end plates with full-perimeter fillet welds deliver precisely this — each bolted connection transfers bending moment, shear, and axial force as a continuous structural node. The result is a stable, sway-resistant frame that meets design requirements for strength, stiffness, and overall stability.
Every beam is fabricated to your specifications — not selected from a catalog. We produce welded H-beams with variable cross-section (tapered) members for portal frames, constant-section beams for multi-span buildings, and any combination of beam depth, flange width, web thickness, and end plate configuration. Send us your structural drawings in DXF, DWG, or PDF — we build to your design, not ours.
Beyond primary beams, we supply the full structural package: C and Z section cold-formed steel purlins for roof and wall support, hot-rolled or welded H-beam columns, corrugated metal roof and wall panels, cross bracing rods, and all connection hardware. Single-source supply means consistent material quality, coordinated delivery scheduling, and one point of accountability for the entire steel structure.
Our main products include STEEL SECTONS (such as H BEAM, IBEAM, ANGLE, CHANNEL), STEEL PIPE, STEEL TUBE.WELDED STEEL STRUCTURE, GALVANIZING SERVICE,GENERAL HARDWARE, STEEL COIL, STEEL PLATE.PHOTOVOLTAIC BRACKET, WIND TOWER PLATFORM,SEISMIC SUPPORT AND ELECTRIC TOWERAll raw materials come from 1st grade steel mills in China andoverseas to ensure the stable performance & quality of finishedproducts. Besides, we have advanced processing equipments and designteam, at any time to meet the various needs of customers.Also we have our own galvanizing mill, which is the most advancedand biggest in China. We have the confidence and ability to offer you the most competitiveprice and quality!
We are based in Tianjin, China, start from 2022, sell to Oceania(40.00%), South America(20.00%), North America(15.00%), Southeast Asia(10.00%), Western Europe(10.00%), South Asia(5.00%). There are total about 51-100 people in our office.
Always a pre-production sample before mass production; Always final Inspection before shipment.
H Beam, Angle Bar, Channel Steel, T Bar Steel, Flat Bar.
Our main products include STEEL SECTONS (such as H BEAM, I BEAM, ANGLE, CHANNEL), STEEL PIPE, STEEL TUBE, STEEL STRUCTURE, GALVANIZING SERVICE, GENERAL HARDWARE, STEEL COIL AND STEEL PLATE, All raw materials come from 1st grade steel mills in China.
Accepted Delivery Terms: FOB, CFR, CIF, EXW, FAS, CIP, FCA, CPT, DEQ, DDP, DDU, Express Delivery, DAF, DES; Accepted Payment Currency: USD, EUR, AUD, HKD, CNY; Accepted Payment Type: T/T, L/C, D/P D/A, MoneyGram, Credit Card, PayPal, Western Union, Cash; Language Spoken: English, Chinese, Spanish, Japanese, Portuguese, Arabic, French, Russian, Korean, Hindi.
