Explore our high-performance Strip Seal Expansion Joints for movement ranges from 0 to 80mm. Featuring a robust steel and EPDM/Neoprene design, they deliver superior watertight sealing, noise reduction, and durability for bridge and infrastructure projects.
The Strip Seal Expansion Joint is a premier solution for effectively sealing expansion gaps in bridges and structures with movement ranges from 0 mm to 80 mm. Its intelligent design combines high-strength steel with a durable elastomeric seal to create a reliable, long-lasting barrier against the elements and dynamic traffic loads.
Our strip seal joints are meticulously constructed from two core components:
Steel Edge Beams (Profiles): Manufactured from hot-rolled structural steel, these beams are available in various profiles (including C, E, F, M, and Z types) to suit specific project requirements. They feature precision grooves that form the foundation of the locking mechanism.
Elastomeric Sealing Strip: The heart of the system, this strip is crafted from high-grade EPDM or Neoprene rubber. It is mechanically locked into the steel beams' grooves, creating a powerful, continuous seal that remains flexible through countless movement cycles.
This synergy between rugged steel and flexible rubber allows the joint to easily withstand heavy vehicular traffic while accommodating thermal expansion and contraction.
Table 1: Specification of Strip Seal Expansion Joints
Item | Displacement | Expansion resistance | |||
Horizontal displacement | Vertical displacement | Horizontal shear displacement | Compression | Longitudinal shearing | |
GQF-C30 | 30 | ± 12 | ± 20 | ≤ 4 | ≤ 6 |
GQF-C50 | 50 | ||||
GQF-C60 | 60 | ||||
GQF-C80 | 80 | ||||
GQF-F30 | 30 | ± 12 | ± 20 | ≤ 4 | ≤ 6 |
GQF-F50 | 50 | ||||
GQF-F60 | 60 | ||||
GQF-F80 | 80 | ||||
GQF-E80 | 80 | ± 12 | ± 20 | ≤ 4 | ≤ 6 |
GQF-Z80 | 80 | ± 12 | ± 20 | ≤ 4 | ≤ 6 |
Note: Strip seal expansion joints in other dimensions can be manufactured upon your request.
Smooth & Quiet: Designed to be rigid and stable in both longitudinal and transverse directions, our joints ensure vehicles pass over smoothly, significantly reducing impact noise and vibration.
Superior Sealing Performance: The mechanically locked elastomeric seal creates a reliable barrier that effectively prevents the infiltration of rainwater and protects against clogging from debris.
Ease of Installation & Maintenance: Featuring a straightforward design, these expansion joints are simple to install, inspect, and clean, resulting in lower long-term maintenance costs.
Proven Strength & Durability: Constructed from high-strength steel and robust rubber, the joint is engineered to withstand heavy vehicular loads and continuous traffic, ensuring long-term structural integrity.
Customizable Configuration: With multiple steel profile shapes and seal compounds available, we can tailor the solution to your project's specific needs.
1. Geometric Compatibility & Installation Parameters
Skew Angles: Suitable for deck skews up to 30 degrees without requiring special molding or significant on-site modification.
Superelevation & Grades: Can be installed on vertical grades of up to 6% and within standard highway superelevation limits without loss of sealing performance.
Movement Range: Engineered to accommodate total thermal movement ranges from 0 mm (fixed) to 80 mm.
Installation Depth: Requires a minimum structural depth of 150 mm from the top of the deck to any underlying reinforcement or obstruction, making it ideal for rehabilitating most existing bridge sections.
2. Material & Structural Interface Compatibility
Deck Joint Type: For use at bridge ends (between deck and abutment) and intermediate hinges within the superstructure.
Anchoring Substrate: Designed for direct embedment into C40/50 concrete or epoxy-grouted into pre-formed block-outs. Compatible with asphalt overlay installations requiring a standard paving notch detail.
Deck Edge Condition: The system can compensate for minor irregularities in the concrete substrate at the saw-cut face.
3. Project Phase Suitability & Replacement Protocol
Direct Replacement: Functions as a 1:1 performance replacement for failed modular or asphaltic plug joints within its movement range.
Installation Timeline: A standard installation for a single lane closure (e.g., 10-meter length) can be completed from saw-cutting to traffic reopening within an 8-hour work window by a trained crew.
Traffic Management: Suitable for projects employing short-term, full-closure or night-time work protocols due to the rapid curing of associated grouts and concretes.
4. Service Environment & Load Capacity
Traffic Load: Rated for all standard AASHTO HL-93 and EU LM1 traffic loading models.
Durability: The EPDM seal maintains elasticity in ambient temperatures from -40°C to +60°C.
Surface Treatment: The steel edge beams are supplied with a minimum 80-micron hot-dip galvanized coating as standard, ensuring corrosion protection for the design life of the joint.
Ⅰ Edgebeam
· Edge Beam Types
Edgebeam is made of hot rolled structural steel confirms to the grade of ASTM A709 Grade 50 or S355 or other equivalence.
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Type C edge beam of expansion joint | Type F edge beam of expansion joint |
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Type Z edge beam of expansion joint | Type M edge beam of expansion joint |
· Typical Layout
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| Typical layout of strip seal expansion joint with C type edge beam | Typical layout of strip seal expansion joint with Z type edge beam |
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| Typical layout of strip seal expansion joint with M type edge beam | Typical layout of strip seal expansion joint with F type edge beam |
Ⅱ Strip Seal
Strip seal is manufactured using extrusion technology and vulcanizing, and conform to ASTM D5973-97(2012) “standard specification for elastomeric strip seals with steel locking edge rails used in expansion joint sealing”.
Waterproof seal strip in C type edge beam | |
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Waterproof seal strip in Z type edge beam | Waterproof seal strip in E type edge beam |
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EPDM waterproof rubber seal for strip seal expansion joint | |
Ⅲ Anchorage
The edge beams are rigidly connected to the main structure by anchors directly welded to the edge beams. The traffic loads transferred from edge beam to anchorages then to substructure. The anchorages are embedded in high strength mortar to assure the maximum resistance of traffic load.
Typically, anchorage is anchor stud, anchor plate, anchor bar or the combinations of them, all of which confirm to ASTM A709 Grade 36 unless otherwise noted. The combination of anchor plate and anchor loop is used for very high traffic volumes.
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Strip seal joint with anchor bar | Strip seal joint with anchor bar and anchor plate |
· Anchorage Layout
Selection of different anchorages mainly depends on the design traffic load and limitations of block-out dimensions. If there is a skew (angle α) between the centerline of carriageway and the centerline of the joint, the anchors shall be arranged after calculations along the skew angle.
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Arrangement of the joint anchorage (without skew) | Arrangement of the joint anchorage (with skew) |
Explore our heavy-duty Aluminum Finger Expansion Joints for movements from 150mm to 1200mm. Offering superior corrosion resistance, lower lifecycle cost, and full compliance with AASHTO & Eurocode standards. The durable alternative to steel joints.
The Aluminum Finger Expansion Joint, also known as a comb joint, is a heavy-duty mechanical system engineered to accommodate the largest thermal expansions, contractions, and dynamic movements in bridge and structural applications. It is specifically designed for movement ranges from 150 mm to 1,200 mm.
The system operates on an intermeshing finger principle. It consists of a series of symmetrical or asymmetrical aluminum finger plates anchored on either side of the expansion gap. These robust "fingers" interlock with each other, bridging the gap. As the bridge structure moves, the fingers slide and/or lift over one another, safely absorbing multi-directional movements (longitudinal, transverse, and rotational) while maintaining a continuous deck surface for traffic.
Arbridge Series Elastomeric Expansion Joints are engineered to handle a wide range of movements, from moderate ±25 mm shifts to very large ±200 mm+ displacements. Integrating elastomeric cores with reinforced metallic elements and robust anchoring, they provide exceptional durability, watertightness options, and minimal maintenance over a long service life.
Elastomeric bridge expansion joints, commonly known as rubber Bridge Expansion Joint or mat expansion joints, provide a durable and cost-effective sealing solution for bridges with low to moderate movement ranges. Their design leverages the inherent properties of elastomers to ensure smooth traffic flow and long-term performance.
Finger expansion joints are engineered to accommodate structural movements ranging from 80 mm to 1,200 mm. These joints consist of steel finger plates, CR (chloroprene) rubber sheets, anchor bolts, and other essential components. A durable rubber sheet is mounted over the retractable steel assembly, while anchor bolts secure the entire structure in place.
The fingers are oriented in the direction of vehicle travel, which helps reduce noise and enhance driving comfort. Additionally, a built-in drainage channel directs rainwater into the bridge’s drainage system, preventing water accumulation and supporting long-term durability.
Also referred to as comb expansion joints, finger expansion joints feature symmetrical or asymmetrical comb-like (saw-tooth or sinusoidal) plates. These plates are anchored on one side of the deck joint gap and interlock to span the opening. Symmetrical finger joints, often called cantilever expansion joints, are typically used for smaller movement ranges. In contrast, asymmetrical designs—known as supported finger expansion joints—are better suited for larger expansion requirements.
Available in various tooth profiles to match specific application needs.
Modular Expansion Joints are engineered systems designed to accommodate large longitudinal movements in bridge structures, typically within a range of 80 mm to 1200 mm. The core mechanism consists of a series of parallel, movement-controlled center beams, supported at predetermined intervals by a substructure of cross beams or girders. This assembly is anchored between two edge beams, which are rigidly and watertightly connected to the bridge deck. The top surfaces of all beams are precision-set flush with the road surface to ensure a continuous running plane.
Westcoast New Area, Qingdao City ,Shandong Province ,China
