Our expansion joints are designed to meet all of the following criteria

01. Watertightness

Collection of runoff water

02. Optimum wheel contact

For driver comfort and low noise level

03. Continuity to non-traffic areas

Footpaths, upstands, barriers, etc.

04. Barrier connection

05. Absorption of structural movements

Shrinkage and creep effects, temperature variations, deformations under live loads, seismic movements, etc.

06. Resistance to aggressive elements

Oil, gravel, salt, sand, etc.

07. Adaptability to various types of structures

Concrete, steel, composite

08. Easy maintenance and replacement under traffic

A simple and robust design

  1. Aluminium alloy or steel elements that ensure the strength of the joint. Short modules facilitate installation under traffic as well as maintenance and cleaning.
  2. Anchoring systems that connect the joint to the main structure.
  3. Continuous elastomeric elements inserted along the entire length of the expansion joint between the metal elements, to prevent the penetration of foreign bodies and to collect run-off water.

Our expansion joints comply with all main standards worldwide.

Road expansion joints

Our range of road expansion joints

Viajoint® (Bitumen joint)

It is suitable to any type of road surface, whatever the structure’s constitutive material. Viajoint® is installed in-situ and combines a bitumen-elastomer binder and aggregates supported by thin aluminium plate over the bridge deck gap. The joint filling mixture is flush with the running surface.

Viajoint® is an appropriate solution for longitudinal joint between parallel bridge decks.

Movement capacity: longitudinal movements of +/- 10 mm. Skew angles up to 50 gr.

Applications: cable-stayed bridges, suspension bridges, slab bridges.
  • Noise control and comfort of use
  • Corrosion resistant and waterproof
  • Rapid installation

N (Nosing joint)

Two edge elastomeric profiles anchored to the adjacent structures and connected by a flexible elastomeric seal which is not flush with the running surface of the road bridge. Metal inserts embedded in the edge profiles provide the necessary mechanical strength for the joint.
This assembly forms a single block system joint of 1 or 2 metres in length.

Movement capacity: single movement capacity of 65 mm. For skew angles under 70 gr, the movement capacity is reduced.

Applications: cable-stayed bridges, suspension bridges, slab bridges.
  • High shock absorption capacity
  • Corrosion resistant
  • Cost-effective solution

WRB (Nosing joint)

It comprises two extruded aluminium alloy profiles supplied in 3-metre lengths and laid face-to-face. These elements are anchored by a series of slightly inclined fasteners in reinforced micro-concrete beams bonded to the main structure by seam reinforcement bars. These fasteners include U-shaped anchors with a load transfer plate. These units are installed end-to-end to form the joint line. A continuous elastomeric seal completes this assembly.

Applications: cable-stayed bridges, suspension bridges.
  • Easy to install and particularly economical
  • Three axis movement capacity
  • Fully watertight

WOSd (Nosing joint)

It comprises two extruded aluminium alloy profiles supplied in 3- or 6-metre lengths and laid face-to-face. These units are installed end-to-end to form the joint line. They are anchored to the main structure by prestressed fasteners. A continuous, elastomeric seal clamped to the joint profiles, along the joint line, completes this assembly.

Applications: cable-stayed bridges, suspension bridges, slab bridges.
  • Easy maintenance and removal of the joint
    High durability using efficient tension control bolts
  • Corrosion protection and waterproofing
  • The absence of saw teeth allows for large skew angles
    and 3 degree movements

JEP (Nosing joint)

It comprises two extruded steel profiles, supplied in 3.50-metre length and laid face-to-face. These sections maintain an extruded elastomeric seal preventing debris and water ingress. The profiles are fitted with two wavy steel anchoring sections embedded in a resin mortar beam bonded to the main structures. These units are installed and butt-welded to form the joint line.

Ideal solution for specific issues: replacement of existing joints, lane by lane installation, renovation work requiring very short traffic interruptions or when execution speed is of primary importance.

Applications: cable-stayed bridges, suspension bridges, slab bridges.
  • Three axis movement capacity
  • Robust and watertight
  • Easy to install

WM (Cantilever joint)

One-piece cantilever saw-teeth joint, comprising metal elements designed to accommodate moving loads at the gap. The inserts are elastomer-coated on surfaces not subject to abrasion, to protect against corrosion. The running surface is made from corrosion-resistant cast iron. The waterproof membrane, although very close to the road surface to enable removal of debris, does not come into direct contact with vehicle tyres. The elements are one metre long.

The triangular saw teeth ensure road surface continuity, user comfort and a significant reduction in joint noise.

Applications: cable-stayed bridges, suspension bridges, slab bridges.
  • Robustness and high durability
  • Easy maintenance and reduced traffic disruption
  • Corrosion protection and waterproofing

WD (Cantilever joint)

Pairs of separate cast aluminium alloy elements with triangular saw teeth. These one-metre units are installed end-to-end to form the joint line. They are anchored to the main structure by prestressed fasteners. A continuous elastomeric seal placed between the joint elements, along the joint line, completes this assembly.

The triangular saw teeth ensure road surface continuity, user comfort and a significant reduction in joint noise.

Applications: cable-stayed bridges, suspension bridges, slab bridges.
  • Robustness and high durability
  • Easy maintenance and reduced traffic disruption
  • Corrosion protection and waterproofing

WP (Cantilever joint)

They consist of a pair of individual steel elements with parallel saw teeth. These 1-metre units are installed end-to-end to form the joint line. They are anchored to the main structure by high prestressed fasteners.

The triangular saw teeth ensure road surface continuity, user comfort and a significant reduction in joint noise.

Applications: cable-stayed bridges, suspension bridges, slab bridges.
  • Robustness and high durability
  • Large movement capacity up to 1,400 mm
  • Easy maintenance and reduced traffic disruption

SX (Mat joint)

They absorb the movements imposed by the main structure through deformation of the elastomeric sections. Each section comprises vulcanised moulded elastomeric elements of 1 or 2 metres in length (depending on the model) bonded to metal inserts designed to accommodate moving loads and distribute stress in the fasteners. This assembly forms a single block system joint of 1 or 2 metres in length.

High shock absorption capacity, without equivalent in the mat joints’ category, owing to the flexibility and damping properties of the high-quality rubber implemented.

Applications: cable-stayed bridges, suspension bridges, slab bridges.
  • Corrosion resistant and fully watertight
  • Anti-skid grooves on upper surface
  • Very effectively adapts to transverse,
    vertical and rotational movements

ISOSISM® SFX (Mat joint)

They are supported by a mat joint which absorbs the movements imposed by the main structure through deformation of the elastomeric sections. This joint consists of elastomeric elements moulded, vulcanized and bonded to steel inserts designed to accommodate traffic loads and distribute loads in the fasteners.

Perfect road surface continuity, with anti-skid grooves on upper surface, for optimum user safety.

Versatility, to work with different average gap sizes simply by adapting the movements.

Applications: cable-stayed bridges, suspension bridges, slab bridges.
  • User comfort
  • Easy installation and maintenance

    Reduced traffic disruption
  • Corrosion protection and waterproofing

LW (Modular joint)

It is a modular expansion joint consisting of a succession of edge beams, watertight elements (elastomeric seals), movement-controlled metal centre beams, supported by moveable cross beams bridging the structural gap.

The capacity varies from 80 to 640 mm depending on the model, but larger movement capacities can be provided on request.

Applications: cable-stayed bridges, suspension bridges, slab bridges.
  • Robustness and waterproof
  • Comfortable for all users (cyclists and vehicles)
  • Noise reduction

Download our technical datasheets on road expansion joints

Documentation

Select the right joint type and model

* : small capacity
** : medium capacity
*** : high capacity
Traffic absorption Durability Water
tightness
Transversal capacity User comfort Noise level Ease of maintenance
 — Viajoint * * *** * *** *** ***
 — N * ** ** ** ** ** ***
 — WRB ** *** *** *** ** ** **
 — JEP *** *** *** *** * ** **
 — WOSd * *** *** *** * ** **
 — WM *** *** ** ** *** *** ***
 — WD *** *** *** * *** *** ***
 — WP *** *** *** * *** *** ***
 — SX ** ** ** ** *** *** ***
 — SFX ** ** ** *** *** *** ***
 — LW *** *** *** * ** ** *

 

Download DWG drawings of our road expansion joints

Documentation

Discover our references

Our other types of expansion joints

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