Rapid-Erection Steel Basket-Handle Arch Bridge to En 1993, Aashto Lrfd & Australian as 5100

• Customization: Available
• After-sales Service: Provide on-Site Installation Guidance
• Warranty: 25-Year Main Warranty
• Model NO.: Eurocode 3, BS EN 1994-2: 2026, GB 50017-2017
• Earthquake Resistance: According to Aashto Seismic Design Categories a-D
• Manufacturing Level: Exc3
• Applicable Standards: En 1993,Aashto Lrfd,Australian as 5100
• Transport Package: Bare Anti-Slip Wooden Pads and Steel Banding
• Specification: Bridge width: 6 m-24 m
• Trademark: Hangzhou FAMOUS Steel Engineering Co., Ltd.
• Origin: China

Product Description

A steel arch bridge is a type of bridge that uses arch ribs as the main load-bearing structure, transferring loads to the abutments at both ends through compression, making full use of the steel's compressive strength. Its core feature is the handling of horizontal thrust at the arch feet: for good foundations, a deck-type arch transfers thrust to the natural foundation; for soft foundations, a tie-arch is used, balancing horizontal thrust through the tie. The bridge spans range from 30 to 200 meters, making it the preferred bridge type for crossing deep valleys, navigable rivers, and city landmark sites.


1.Scenario Category

Scenario Category	Typical Application Environment	Recommended Bridge Configuration
Highway & Road Transit	Intercity highways, urban overpasses, ring roads	Deck arch bridge, tied arch bridge
Railway & Urban Rail	Freight/passenger rail lines, metro crossings	Through arch bridge, rigid frame arch
Pedestrian & Recreation	Urban parks, scenic spots, waterfront greenways	Curved arch bridge, lightweight truss arch
Waterway & Valley Crossing	River channels, deep valleys, canal crossings	Long-span box arch bridge, basket handle arch

 
2.Product Highlights
l Integrated Inclined Arch Ribs and Out-of-Plane Stability: The inward-inclined basket arch reduces the need for out-of-plane support, improving self-stability by over 50%.
l Cantilever Assembly Without Supports: Using a cable-stayed tower system, arch rib segments are assembled cantilevered from both sides toward the center, without any temporary supports under the bridge.
l Erection by Vertical or Horizontal Rotation: In narrow valleys or when crossing existing lines, arch ribs can be assembled at a low position and then rotated vertically or horizontally into place.
l Damping Cross Cables for Hangers: Fine wire cross cables are installed between hangers (similar to network arches) to eliminate wind-induced vortex vibrations and resonance.
l Concrete Infusion Inside Pipes: For steel tube concrete arch ribs, high-strength concrete is poured inside the tubes, increasing load-bearing capacity by 2-3 times compared to hollow steel tubes.
l Concrete Encasing at Arch Foot: The arch foot segments are encased in reinforced concrete, serving as counterweights and protecting the steel structure from splash corrosion.


3.Product Materials
The core load-bearing components of our steel arched bridge are all made of high-performance special steel for bridges, which strictly meet the mechanical property requirements of the world's mainstream standards. The core material selection includes:
ü Low alloy high strength structural steel: Adopt mainstream grades such as A572 Grade 50, with a minimum yield strength of 345MPa, excellent tensile, compressive and welding properties, and is the core material for the main structure of the bridge.
ü Weathering bridge steel: Adopt weathering steel grades such as A709 Grade 50W, which achieves excellent atmospheric corrosion resistance through alloying design, and can greatly reduce the painting maintenance demand in coastal and high humidity environments, and extend the service life of the structure.
ü Anti-corrosion supporting materials: For high salt spray and strong corrosion environments, it can be matched with anti-corrosion systems such as hot dip galvanizing, zinc-rich primer and fluorocarbon topcoat, or 304/316 stainless steel material can be selected to achieve full-cycle anti-corrosion protection.
ü High-performance connecting materials: All nodes adopt high-strength bolts and welding materials that meet ASTM and EN standards to ensure that the mechanical properties of the connecting nodes are completely matched with the main structure, and eliminate structural weak points.


4.Design Features
Ø Reasonable Arch Axis Selection: The deviation between the permanent load pressure line and the arch axis is controlled within ±5% of the arch height, using a parabolic or catenary fit.
Ø Separation Check of In-Plane and Out-of-Plane Buckling: In-plane buckling is calculated using the equivalent column method; out-of-plane buckling considers the lateral tilt of the arch ribs and the stiffness contribution of the cross braces.
Ø Optimization of Initial Tension in Hangers: The initial tension in the hangers is determined through reverse construction stage analysis to ensure uniform tension in all hangers after the bridge is completed.
Ø Special Analysis of Dynamic Characteristics: Natural frequencies, mode shapes, and wind-induced flutter critical wind speed must be greater than 1.2 times the design wind speed.
Ø Seismic Performance Design: Abutments and key nodes are designed according to the capacity design principle, with plastic hinges appearing in predetermined locations (e.g., web members).
Ø Full-Process Construction Monitoring: Assembly line shape of the arch ribs, tension in the tie rods, closure temperature, and preset adjustment allowances for the length of closure segments are monitored throughout the construction process.


5.Core Advantages
Unobstructed Clearance under the Bridge: Piers or abutments are located on both banks, with no structures in the river channel, maximizing navigational clearance utilization.
High Structural Stiffness and Low Deformation: The overall stiffness of an arch bridge is usually 2-3 times that of a beam bridge, with small live load deflection, ensuring high driving comfort.
Slow Increase of Material Usage with Span: For spans exceeding 80 meters, the steel consumption per unit area of arch bridges is better than that of beam bridges.
Visual Landmark Effect: The arch rib curve echoes the skyline, enhancing the project's social value.
Good Maintenance Accessibility: Inspection passages can be set inside the arch ribs, hangers can be replaced from the bridge deck without closing traffic.
High Seismic Redundancy: Multiple-member systems (truss arches) have multiple load transfer paths, so local failure does not lead to overall collapse.


6.Global Standard

Standard Name	Issuing Authority	Core Application Scope
AASHTO LRFD Bridge Design Specs	American Association of State Highway and Transportation Officials	North American highway & railway steel arch bridges
Eurocode 3: Part 2 Steel Bridges	European Committee for Standardization (CEN)	EU member states steel bridge design & construction
BS EN 1994-2:2026	British Standards Institution (BSI)	UK composite steel-concrete arch bridge design
GB 50017-2017	Standardization Administration of China	Chinese domestic steel structure bridge engineering

 
7.Choose Us
Choosing our steel arch bridge means you are choosing a technical team that deeply integrates the mechanics of classic arch bridges with modern construction techniques. We do not just deliver arch rib curves - we deliver properly aligned arch axes rigorously fitted to the thrust line, stability reserves verified through nonlinear buckling, and cantilever assembly solutions without scaffolding that perfectly adapt to the actual site terrain.
Satisfied after reading? Feel free to contact us, we look forward to working with you!