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Help CenterAnchor Bolt Hot Dip Galvanized Long Thread ETA Approved Full Sizes Available for Bridge Construction Factory Direct
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Product Introduction:
Hefei SENOTECH New Materials Co., Ltd, with an annual export value of US$1–1.5 million and a global market presence spanning North America, Europe, Asia, and Oceania, proudly presents our premium Anchor Bolt with Hot Dip Galvanized finish, Long Thread design, and full ETA approval. Designed specifically for demanding bridge construction projects, these anchor bolts offer unparalleled corrosion resistance, precise load transfer, and easy installation. As a factory-direct supplier, we provide complete size ranges to meet diverse engineering requirements while maintaining cost efficiency and strict quality control.
Key Features & Technical Specifications:
- Hot Dip Galvanized (HDG) Finish: Provides superior protection against rust and environmental corrosion, extending service life in harsh outdoor bridge environments. Average zinc coating thickness ≥ 85 μm per ASTM A153.
- Long Thread Design: Thread length up to 3–5 times the diameter (e.g., M20 long thread ≈ 100mm), allowing flexible nut adjustment and tensioning for precise bolt elongation.
- ETA Approved: European Technical Assessment ensures compliance with rigorous structural safety standards EN 1993-1-8 and EN 1090, guaranteeing reliable performance in critical bridge connections.
- Full Size Availability: Diameters from M12 to M64, lengths from 100mm to 2000mm (or customized per project), covering all standard bridge anchoring needs.
- High Strength Grades: Optional grade 4.6, 8.8, or 10.9 carbon steel / alloy steel, heat-treated to achieve specified yield and tensile strength.
- Factory Direct Supply: Eliminates middlemen, reduces lead time, and offers competitive pricing with batch consistency.
Technical Parameter Table (Typical Dimensions & Mechanical Properties):
| Diameter (d) | Thread Length (Lt) | Total Length (L) | Grade | Zinc Coating (avg) | Tensile Strength (MPa) |
|---|---|---|---|---|---|
| M16 | 80 mm | 200 – 600 mm | 8.8 | 85 μm | 800 |
| M20 | 100 mm | 300 – 800 mm | 8.8 | 90 μm | 830 |
| M30 | 150 mm | 500 – 1500 mm | 10.9 | 100 μm | 1040 |
| M42 | 210 mm | 800 – 2000 mm | 10.9 | 110 μm | 1050 |
Note: Custom sizes and grades are available upon request. All bolts comply with EN 1993-1-8 and ETA requirements.
Benefits for Your Bridge Construction Project:
- Enhanced Durability: HDG coating withstands salt spray, moisture, and temperature extremes typical in bridge environments, reducing maintenance costs.
- Simplified Installation: Long threads provide ample adjustment range, accommodating minor misalignments and enabling precise preloading.
- Structural Safety: ETA approval means the product has passed stringent European testing for load-bearing capacity and long-term performance.
- Cost Efficiency: Factory-direct pricing eliminates markups, while full size availability reduces the need for custom fabrication on-site.
- Global Logistics: We export to over 10 regions worldwide, with well-established shipping and documentation processes ensuring timely delivery.
Company Trustworthiness:
Founded in 2020, Hefei SENOTECH New Materials Co., Ltd has quickly built a reputation for dependable fastener solutions. With an annual export value of US$1 million to US$1.5 million, we serve clients in North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and more. Our quality control system covers raw material sourcing, galvanizing process monitoring, and 100% dimensional inspection before shipment. We also offer flexibility in packaging (pallets, wooden crates, or custom) and can provide test certificates and traceability documents upon request. Choosing our anchor bolts means partnering with a supplier committed to quality, reliability, and customer satisfaction.
Frequently Asked Questions (FAQ)
Q1: What does ETA approval mean for anchor bolts?
A: ETA (European Technical Assessment) is a mandatory certification for construction products sold in the European Union. It confirms that the anchor bolt meets mechanical performance, durability, and safety requirements defined in the European Assessment Document (EAD). This gives engineers and contractors confidence in the product's suitability for critical structural connections.
Q2: How thick is the hot dip galvanized coating on your bolts?
A: Our standard HDG coating averages 85–110 μm, depending on bolt diameter. This exceeds the minimum requirement of 70 μm for M16 and above per ASTM A153 and EN ISO 1461. Heavier coatings are available upon request for extremely corrosive environments.
Q3: Can you supply anchor bolts with custom lengths or diameters?
A: Yes, we offer full customization. While we stock common sizes (M12–M64, lengths 100–2000mm), we can produce any diameter and length within our production capacity. Please provide your specific requirements, and our technical team will confirm feasibility and lead time.
Q4: What packaging do you use for export?
A: Standard packaging is in steel-sealed pallets with plastic wrapping to protect against moisture. Wooden crates or honeycomb cartons are available for fragile or mixed orders. Each pallet is banded and labeled with product details and quantity. We can also follow your preferred packaging specification.
Q5: What is the typical lead time for a full truckload order?
A: For common sizes in stock, lead time is 7–10 working days. For custom sizes or special grades, we typically need 15–25 working days depending on quantity and galvanizing schedule. We will always confirm exact lead time in the quotation.
Q6: Are these anchor bolts suitable for seismic or high-stress bridge applications?
A: Absolutely. The bolts are designed to meet the performance requirements of EN 1998 (Eurocode 8 for seismic design). With grades up to 10.9, they provide high yield strength and ductility. The long thread design also allows proper nut engagement after tensioning, which is critical for seismic resistance.
Q7: Do you provide material test certificates and traceability?
A: Yes, we can issue Mill Test Certificates (MTC) for the raw materials, as well as an inspection report for the finished bolts, including galvanizing thickness, thread gauging, and dimensional checks. Traceability is maintained from steel batch to final product marking.
Q8: What is the difference between your long thread anchor bolt and a standard anchor bolt?
A: A standard anchor bolt typically has a short threaded portion (e.g., 1.5–2 times diameter). Our long thread version extends 3–5 times the diameter, allowing for greater adjustment in bolt protrusion and easier nut installation in deep embedment or when precise tension is required. This is especially beneficial in bridge construction where multiple components need to be aligned.
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