Finger Bridge Expansion Joint

Guchen is a professional manufacturer of finger bridge expansion joints (finger plate joints), providing high-quality steel finger type expansion joints for highway, railway, and long-span bridges. Our finger expansion joints feature large displacement capacity, smooth traffic performance, and durable steel structure, with custom sizes available to meet all bridge design requirements.

Finger Bridge Expansion Joint | Steel Finger Plate Joint for Highway & Railway Bridges

Our finger bridge expansion joint (also known as finger plate joint / comb plate joint) is a high-performance bridge deck expansion device, designed to accommodate large structural displacement caused by temperature changes, vehicle loads, and seismic activity. It is widely used in highway bridges, high-speed railway bridges, urban viaducts, and long-span bridge projects worldwide.

1.Key Features

Large Displacement Capacity: Suitable for bridge displacement ranges from 80mm to 1200mm, ideal for long-span and heavy-load bridges.
Smooth Traffic Performance: The interlocking steel finger structure ensures a flat driving surface, reducing vehicle impact and noise.
Durable Steel Structure: Made of high-strength Q355B/ASTM A572 Grade 50 steel, with hot-dip galvanizing or epoxy coating for corrosion resistance.
Easy Installation & Maintenance: Modular design simplifies on-site installation, and replaceable parts reduce long-term maintenance costs.
Reliable Sealing System: Equipped with EPDM rubber sealing strips to prevent water leakage and debris intrusion, protecting the bridge substructure.

2.Technical Specifications

Parameter	Details
Product Type	Finger Bridge Expansion Joint / Finger Plate Joint / Comb Plate Joint
Displacement Range	80mm – 1200mm (customizable)
Steel Grade	Q355B / ASTM A572 Grade 50
Sliding Plate Material	Stainless Steel 304 / 316
Sealing Material	EPDM / Nitrile Rubber
Surface Treatment	Hot-dip Galvanizing / Epoxy Coating
Bolt Grade	8.8 / 10.9 High-Strength Bolt
Design Life	≥ 30 years
Working Temperature	-40°C ~ +60°C
Compliance Standards	JT/T 327-2016, AASHTO LRFD, EN 1337-4

Finger Bridge Expansion Joint Plan View Drawing, Steel Finger Plate Joint Top View Structure Diagram — Finger Bridge Expansion Joint Plan View Structure Drawing

Finger Bridge Expansion Joint Elevation View Drawing, Steel Comb Plate Joint Cross-Section Structure Diagram — Finger Bridge Expansion Joint Elevation View Structure Drawing

Finger Bridge Expansion Joint Model Specification Table, 80-360mm Displacement Size Chart with Anchor Bolt Parameters — Finger Bridge Expansion Joint Model Specification Table (80-360mm)

Finger Bridge Expansion Joint 3D Product Renderings, Steel Finger Plate Joint Structure & Assembly Photos — Finger Bridge Expansion Joint 3D Product Renderings & Assembly Structure

3.Applications

Highway & expressway bridges
High-speed railway & standard railway bridges
Urban overpasses and viaducts
Long-span cable-stayed & suspension bridges
Bridge reconstruction & renovation projects

4.Why Choose Guchen as Your Finger Bridge Expansion Joint Manufacturer?

15+ years professional manufacturer of bridge expansion joints and engineering rubber products
Full customization for displacement, bridge type, and load requirements, including custom design per technical drawings
ISO 9001 certified & 100% factory inspection before shipment
Factory direct price with no middleman, competitive cost for global projects
Exported to over 30 countries with global technical support and installation guidance