Qingdao BEST Steel Structure Co., Ltd. is one of the leading manufacturers and suppliers of m type transmission line tower in China. With abundant experience, Our factory offer high quality products made in China with competitive price. Welcome to contact us for customized service and OEM service.
M-type transmission line tower is a widely used angle steel tower in high-voltage power transmission projects. It features a compact structure and high load-bearing capacity, extensively applied to 35–220kV overhead transmission lines.
It is manufactured from high-quality Q235B and Q355B carbon steel. The surface is treated with hot-dip galvanizing for anti-corrosion, endowing the tower with excellent corrosion resistance. It is suitable for harsh and corrosive environments and greatly improves service durability.With a streamlined tower body, it has low wind resistance and strong anti-overturning performance. Its superior load-bearing capacity and structural configuration make it an ideal solution to meet power transmission demands in urban and remote areas.
Qingdao BEST Steel Structure Co., Ltd. provides all-round services covering engineering design, prefabrication processing, installation guidance and maintenance.

product Parameter (specification)
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Height |
From 10M-120M or according to customer's requirement |
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Color |
Original zinc silver or painted according to customer's requirement |
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Shape |
According to design drawings |
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Material |
Normally Q235B/A36,Yield Strength≥235MPa |
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Q235, Q355B/A572,Yield Strength≥355MPa, Q420, Yield Strength≥420MPa |
|
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Tolerance of the dimension |
According to customers requirement |
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Surface treatment |
Hot-dip-galvanized, or any other standard by client's requirement |
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Joint of Poles |
Slip joint, flanged connected |
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Standard |
ISO9001:2008 |
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Length of per section |
Within 13M once forming |
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Welding Standard |
GB50661-2011/AWS(American Welding Society)D 1.1 |
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Production Process |
Incoming material test and inspection - raw material cutting and holes punching - connecting parts processing - mounting parts tack and welding - surface treatment by hot dip galvanizing - final inspection and packaging |
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Packages |
Packing with protective material or according to customer's requirement |
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Durability |
The M Type Transmission Line Tower can last More than 30 years according to installing environment |

Product characteristics and application
Excellent Mechanical Properties: Based on the bionic mechanical design of the symmetrical M-shaped structure, the components feature linear force transmission without hidden dangers of local stress concentration. It can resist multiple external impacts such as strong winds, ice accretion, and temperature deformation. The tower body boasts balanced overall rigidity with minimal swing amplitude during operation, which effectively guarantees the stability of transmission lines and avoids risks of conductor abrasion and fracture.
Higher Cost Performance: The steel layout is optimized to realize the lightweight design of the tower body. This not only reduces raw material loss, but also narrows the foundation excavation area and cuts down concrete consumption, balancing low-carbon environmental protection and civil construction cost control. In the later operation and maintenance stage, the lightweight tower and concise structure improve the efficiency of inspection, overhaul and component replacement, significantly reducing long-term operation and maintenance costs.
Controllable Precision: Standardized modular design is adopted in the whole process, with uniform component dimensions and precise hole matching, completely eliminating on-site non-standard operations such as cutting and hole reaming. The modular split structure facilitates disassembly and transportation, enabling easy handling and hoisting even in narrow road areas such as mountainous regions and woodlands. For line capacity expansion and renovation in the later stage, components can be directly replaced or added without overall demolition and reconstruction, adapting to the needs of power grid upgrading and transformation.
Anti-corrosion: Adopting high-temperature hot-dip galvanizing full-coverage anti-corrosion technology, the zinc coating features strong adhesion and uniform compactness, standing up to sun exposure, rain erosion, acid and alkali corrosion, and sand wear. It adapts to special geological environments including coastal salt fog, inland saline-alkali land, and industrial polluted areas. With no anti-corrosion blind spots in welding, the service life can reach more than 30 years under normal working conditions, greatly reducing the frequency of later anti-corrosion renovation.
Adaptable to Diverse Line Requirements: The tower structure is flexible and adjustable, with customizable cross-arm quantity, suspension height and tower slope. It meets the erection requirements of single-circuit and double-circuit transmission lines, and is also compatible with multi-circuit co-tower erection to save line corridor land. In addition, mounting interfaces for communication and monitoring equipment can be reserved to realize the integrated integration of power transmission, communication and online monitoring, complying with the construction standards of smart grids.

Production details and product qualification
M-type transmission towers are manufactured through sophisticated production processes. Each batch of raw materials undergoes full inspection upon entry to the factory, followed by precision forming of M-shaped components via customized CNC production lines. Modular assembly is carried out with dedicated positioning fixtures, and key welds are fabricated by certified welders and subject to full coverage non-destructive testing. Subsequently, the products go through high-precision drilling and standardized hot-dip galvanizing for anti-corrosion treatment, as well as integral trial assembly and final inspection before delivery. Classified protective packaging and tailored logistics management are adopted to ensure intact delivery of all components.

Commitment to Quality, Safety, and Compliance:
Our products come with complete and authoritative qualifications. We hold industrial product production licenses for transmission line towers, professional qualifications for steel structure manufacturing, and qualified supplier certifications from the two major power grid companies as essential industry access credentials. We have also obtained the three major ISO management system certifications and fully comply with national and industrial standards. Complete inspection reports are provided for raw materials, welding seams, anti-corrosion performance, mechanical loads and other items. The enterprise holds a high-tech enterprise certificate, professional welder qualifications and third-party authoritative quality inspection certifications, which comprehensively guarantee product quality and project compliance.
Why choose M Type Transmission Line Tower from Qingdao BEST Steel Structure Co., Ltd.?
The M Type Transmission Line Tower developed by Qingdao BEST Steel Structure Co., Ltd. Provides fully customizable, and reliable support solutions for cables and relevant components. Our M Type Transmission Line Tower are fabricated from high-quality carbon angle steel and precision-engineered using fully automatic CNC machining tools to ensure dimensional accuracy and structural integrity. With hot-dip galvanization as surface treatment for anti-corrosion measures, each tower achieves a service life of over 30 years, with exceptional resistance to corrosion and environmental stress.
Boasting complete corporate qualifications and a sound quality inspection system, we exercise full-process quality control from production to delivery. Paired with one-stop after-sales operation and maintenance services, we not only ensure durable and reliable products but also facilitate efficient implementation and compliant commissioning of engineering projects, delivering a leading edge in both cost performance and after-sales support.
Enquire to us today and establish partnership with one of the most trustworthy and reliable steel tower supplier in China.
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