Engineered to resist intense tropical typhoons, seismic shears, and severe monsoonal wind loads across Eastern Seaboard and Central Plain industrial complexes.
In modern pre-engineered building (PEB) design, cold-formed steel (CFS) girts serve as the critical secondary framing mechanism interconnecting primary structural portal frames with the building's exterior cladding envelope. Far beyond functioning as mere attachment battens, horizontal steel girts are structurally responsible for transferring severe horizontal lateral loads—predominantly inward positive wind pressures and outward monsoonal wind suction—directly into the main columns. Concurrently, when engineered in strict compliance with AS/NZS 4600:2018 (Cold-formed steel structures) and AISI S100 standards, steel girts provide lateral torsional buckling restraint to the exterior flanges of primary columns under gravity and seismic moments, drastically reducing the effective unbraced column length ($L_{cr}$).
The atmospheric reality of the Gulf of Thailand and adjacent industrial provinces introduces rigorous durability demands. The convergence of high ambient humidity (averaging 75% to 85% year-round), elevated temperatures exceeding 38°C, heavy cyclical monsoon downpours, and dense chemical emissions in provinces such as Rayong and Chonburi classifies these environments as C4 to C5 corrosive atmospheres according to ISO 12944. Traditional structural carbon steels without advanced protective metallurgy experience premature micro-pitting and rust staining within 18 to 24 months. Our steel girts utilize premium cold-rolled galvanized steel sheets with high-adhesion zinc masses up to Z275 (275 g/m² total both sides) or 55% Aluminum-Zinc alloy coatings (AZ150 Galvalume), establishing a resilient galvanic self-healing boundary layer that resists micro-fissuring during high-speed CNC roll-forming and field punching operations.
| Profile Designation | Web Depth ($D$) | Flange ($B_1/B_2$) | Lip ($L$) | Base Metal Thickness ($t$) | Minimum Yield ($f_y$) | Moment of Inertia ($I_x$) |
|---|---|---|---|---|---|---|
| C15015 / Z15015 | 150 mm | 64 / 60 mm | 15 mm | 1.5 mm | G450 (≥450 MPa) | 198.4 cm⁴ |
| C20019 / Z20019 | 200 mm | 76 / 70 mm | 19 mm | 1.9 mm | G450 (≥450 MPa) | 492.1 cm⁴ |
| C25024 / Z25024 | 250 mm | 76 / 70 mm | 20 mm | 2.4 mm | G450 / G500 (≥500 MPa) | 896.7 cm⁴ |
| C30030 / Z30030 | 300 mm | 96 / 88 mm | 25 mm | 3.0 mm | G450 / G550 (≥550 MPa) | 1,640.2 cm⁴ |
| C35032 / Z35032 | 350 mm | 100 / 92 mm | 28 mm | 3.2 mm | G450 / G550 (≥550 MPa) | 2,480.5 cm⁴ |
Engineered to satisfy specific geographical, environmental, and architectural specifications across major Thai economic corridors.
Installed across Rayong, Chonburi, and Chachoengsao industrial parks (WHA, Amata City). High-tensile G550 Z-girts support wide-bay EV manufacturing facilities requiring minimal columns and clean, pre-punched secondary wall steel.
Deployed in heavy chemical zones around Map Ta Phut Port and Laem Chabang Deep Sea Port. Heavy-dip Z275/AZ150 coatings withstand marine airborne chlorides and sulfur emissions without flaking or chemical degradation.
Central Plain distribution hubs (Bangna-Trad, Samut Prakan, Pathum Thani). C-girts engineered with thermal-break isolators support thick PIR/PU sandwich panels, eliminating condensation and thermal leakage in temperature-controlled spaces.
Processing plants in Saraburi, Ayutthaya, and Nakhon Ratchasima. Resistant to severe interior ammonia vapors, grain dust moisture, and pressure washdowns, maintaining long-term structural integrity with zero weld failure risk.
Analyzing key structural, economic, and green building factors accelerating cold-formed steel girt adoption in Thailand 4.0 initiatives.
Thai EPC contractors are rapidly transitioning away from heavy hot-rolled channels (JIS G3101 SS400) toward G450/G550 cold-formed girts, slashing secondary steel tonnage by 35% to 45% and reducing foundation dead load requirements.
Under Thailand's Power Development Plan (PDP) solar expansion, secondary framing must accommodate substantial additional dead loads and parapet wind vortices. Our high-moment profiles offer pre-calculated deflection margins for retrofits.
Modern industrial estates mandate zero on-site hot work (welding and flame-cutting) to minimize toxic emissions and fire hazards. CNC pre-punched girt systems allow 100% bolted field connections using high-tensile Grade 8.8 bolts.
Thailand's Department of Public Works and Town & Country Planning enforces wind design criteria accounting for coastal tropical wind bursts. Our certified section modulus data provides verifiable proof for local municipal building permits.
Single-source quality control from raw hot-dip galvanized steel coil slit lines to custom jobsite packing and export logistics.
Operating advanced multi-stand CNC roll-forming lines, we cold-form structural C and Z girts with strict dimensional adherence to cross-sectional symmetry, flange angles, and stiffener lip geometries. Our inline automated hydraulic punching presses execute web cleat holes, elongated thermal expansion slots, and anti-sag rod apertures with precision tolerance within ±1.0 mm, guaranteeing seamless site bolt-up without torch adjustments.
By coordinating secondary cold-formed steel girts and purlins with insulated sandwich panels (PIR, PU, Rockwool), profile decking sheets, and precision flashings, contractors can source a fully engineered, thermally and structurally unified building envelope from a single certified source.
Key structural, metallurgical, and logistics answers for EPC contractors, design consultants, and procurement managers.
Consult with our structural engineering team for span charts, section moduli, wind-load capacity calculations, and factory-direct pricing for your Thailand infrastructure project.