Explore our top-tier manufacturing lines featuring highly durable bolts, self-drilling screws, and structural concrete anchoring accessories.
Analyzing stress distributions, anchor mechanics, expansion sleeve geometries, and optimal loading parameters in cracked and uncracked concrete matrices.
In modern structural and seismic engineering, wedge bolts (commonly referred to as expansion anchors or stud anchors) are categorized as mechanical torque-controlled expansion fasteners. These elements operate on friction-based load transfer mechanisms. When installed into a pre-drilled cylindrical cavity in concrete, the application of tightening torque draws the tapered mandrel of the bolt upward through the expandable collar or sleeve. This expanding sleeve exerts high radial forces against the concrete borehole walls, creating a secure connection that can support tensile, shear, and combined loads.
For global infrastructure initiatives, selecting the appropriate grade of wedge bolts is critical. Quality manufacturers must adhere to international guidelines such as the European Technical Assessment (ETA) Option 1 (specifically for cracked concrete installations) and the International Code Council Evaluation Service (ICC-ES) criteria. Non-compliant anchorages can suffer from brittle failure modes, concrete cone breakout, wedge pull-through, or anchor steel rupture under dynamic, wind, or seismic loading cycles.
The mechanical performance of these systems is closely linked to metallurgical specifications. High-tensile carbon steel (Grades 5.8, 8.8, and 10.9) and high-alloy stainless steels (SS304, SS316, and duplex alloys) are utilized to balance load capacity and corrosion resistance. By integrating advanced hot-dip galvanization (HDG) and zinc flake coatings (such as Geomet), manufacturers extend the lifespan of anchoring systems in heavy industrial and marine zones.
| Parameters / Specs | Carbon Steel Gr. 8.8 | Stainless Steel A4-80 | Seismic Designation |
|---|---|---|---|
| Tensile Strength (fuk) | 800 MPa | 800 MPa | C1 / C2 Approved | Yield Strength (fyk) | 640 MPa | 600 MPa | High ductility |
| Coating Thickness | ≥ 50 μm (HDG) | Passivated Self-Luster | ISO 1461 Compliant |
| Dynamic Performance | Excellent Fatigue Resistance | Ultimate Corrosion Resistance | ETA Option 1 Tested |
Handan Yongnian District Dongshuo Fastener Manufacturing Co., Ltd. was established in 2015. It is an enterprise specializing in the production and operation of fasteners. Our company is committed to providing high-quality fastener products and providing customers with comprehensive solutions in various industries. As a reputable fastener manufacturer, we have advanced production equipment and a professional technical team to meet our customers' needs for different types of fasteners.
Strategically located in Handan City, Hebei Province—the renowned "Fastener Capital of China"—Dongshuo leverages local industrial supply chain ecosystems to guarantee consistent quality, scalable production capacity, and reliable material sourcing. We oversee every stage of the design, engineering, and manufacturing phases to ensure compliance with demanding global structural testing benchmarks.
Driving technological transformation across concrete anchoring applications, metallurgical formulas, and seismic performance profiles.
Redesigning the expansion collar profile with multi-staged external ribs to increase contact surface friction and reduce edge distance requirements in thin concrete slabs.
Conducting cyclic tension and shear loading validation under simulated seismic events. Meeting compliance frameworks for safety-critical installations in earthquake-prone zones.
Transitioning from traditional hexavalent chromium coatings to sustainable, high-performance zinc-flake coatings, delivering up to 1500 hours of salt spray testing without red rust.
Integrating strain gauges and digital sensors within heavy-duty anchoring systems to enable real-time structural health monitoring for tunnels and bridges.
Engineered to support heavy structural applications and demanding operating environments globally.
Providing heavy-duty wedge anchors for highway safety barriers, structural column bases, rail expansion works, and heavy-duty bridge girders.
Ensuring dynamic load stability and wind load resistance for high-rise buildings, glass curtain walls, and external cladding assemblies.
Supporting high-load mechanical racks, ventilation ducting systems, overhead pipe brackets, and electrical cable trays under dynamic vibration.
Integrating automated raw material sizing, multi-stage forging, and digital quality monitoring to deliver large-volume product consistency.
Our manufacturing facility utilizes high-speed cold-forging machines to achieve precise dimensional control for wedge bolt shanks and threads. Cold-working increases steel hardness and tensile properties compared to hot-forging, ensuring the completed anchor meets specified load limits.
Quality control is supported by automated optical inspection lines. Every production batch undergoes laser sorting checks to filter out dimensional irregularities, thread defects, or structural variations, working toward a goal of zero-defect delivery.
Operating from the Yongnian District industrial hub, we maintain stable access to raw materials and heat treatment processes. This close integration allows us to offer shorter lead times and competitive pricing structures for large-scale global shipments.
Explore our core product catalog, offering high durability and specialized designs to meet diverse industrial requirements.
Delivering engineering support, reliable manufacturing capacity, and responsive customer service for international buyers.
Our pricing is negotiable. Quotes can be adjusted based on order volume, packaging, and specific shipment terms.
Samples are available upon request. Shipping costs can be settled on delivery or prepaid via standard channels.
Our manufacturing processes employ environmentally friendly materials in compliance with green supply chain standards.
We support flexible order sizes, adjusting production scheduling to meet custom delivery targets.
Provide your custom drawings or logo designs. We can create new tooling and provide pre-production samples for verification.
Contact us via email or chat to coordinate shipping documents, order updates, and post-sale technical support.
Answers to common structural specifications, factory standards, and purchasing procedures.
Our extended manufacturing catalog offers specialized connection components, sheet metal fasteners, and threaded structural solutions.
Our quality control procedures are structured to meet strict global engineering and material safety standards.
Incoming steel wire rods undergo spectrometer testing to verify alloy composition, followed by tensile tests to confirm mechanical performance prior to cold forging.
We verify external thread pitch, major diameter, and minor diameter values using calibrated ring gauges, meeting ISO 965 and ASME B1.1 standards.
We test hot-dip galvanized and electroplated surfaces to confirm coating adhesion and layer thickness, helping to prevent premature oxidation in high-humidity applications.
When you are keen on any of our items following you view our product list, please feel free to make contact with us for inquiries. You'll be able to send us emails and get in touch with us for consultation and we shall respond to you as soon as we are able to. Our engineering team is available to assist with custom dimensional design, material selection, and certification requirements.
Handan Yongnian District Dongshuo Fastener Manufacturing Co., Ltd.
Production Base: Yongnian District, Handan City, Hebei Province, China
Business Focus: High-Performance Expansion Anchors, Hexagon Bolts, Custom U-Bolts, and OEM Fastener Systems.
Dongshuo