All angle steel members are cut, punched, and adjusted on Winture's in-house CNC high-speed fabrication lines. Strict dimensional tolerance control ensures consistent bolt hole alignment and member geometry across all production batches — a critical requirement for modular tower assembly where every hole must match across thousands of individual members.

All angle steel is sourced exclusively from Tier 1 certified mills. Chemical composition (via OES spectrometer) and mechanical properties (yield strength, tensile strength, elongation, impact toughness) are verified in Winture's ISO-certified laboratory on every incoming batch. Mill Test Certificates are provided with every delivery.

Winture operates two dedicated hot-dip galvanizing pools. All galvanizing uses 99.999% pure zinc ingots and follows a strict HDG process and quality assurance plan. Coating thickness of 90μm to 120μm is achieved and verified by in-house coating thickness measurement and salt spray testing. Applicable for extreme coastal (C5-M) and desert environments.

With two in-house galvanizing lines, Winture achieves coating thickness of 85μm to 120μm (or customized per project specification), using 99.999% pure zinc ingots. Galvanizing coating is validated by in-house salt spray testing, with a 25-year coating warranty against corrosion and peeling.

Every tower component passes Winture's four‑stage PDCA quality loop:

IQC: Chemical composition and mechanical property verification on incoming angle steel

IPQC: Dimensional checks at CNC cutting,punching, and angle adjustment stages

FQC: Final member geometry inspection and galvanizing thickness verification

OQC: Pre‑shipment packaging inspection and document compilation

All structural connections use high-strength bolts per ASTM A394 or EN 14399. No air welding is required on site, reducing skilled labor requirements and enabling installation in remote locations without welding equipment. Modular construction reduces on-site construction time and labor cost by up to 20%