Expansion Joints

Expansion joints ensure a continuous surface for traffic on structures regardless of the deformations induced by temperature conditions, wind, traffic, or any other effect while maintaining the water tightness of the rest of concrete or steel deck. Expansion joints provide a continuous road surface to all users of a road or railway while at the same time ensuring water tightness as well as allowing every displacement or rotation expected at the structure.

A wide array of types and models ensures that every structural work situation anywhere in the World can find a suitable
solution within MK4 catalogue.

MK4 joints are widely used in structural, marine and civil engineering applications, mainly in bridges. Joints are available in rubber and carbon steel as standard, and can have components made in aluminum or stainless steel for applications where corrosion is a potential problem. Each particular project has specific needs that require a tailored joint for maximum efficiency at minimum maintenance.

Modular Expansion Joint

High performance steel joints where the total movement gap is divided into individual gaps or modules. Expansion/ contraction is ensured by a rubber V- shaped profile linking two steel center beams. Center beams ensure bearing capacity towards traffic loads, while rubber profiles ensure water tightness and movement capacity.

Rubber Expansion Joint

High performance rubber expansion joint that allows absorption of deck movements and water evacuation while bearing the traffic loads and avoiding the traffic disturbances. The continuous rubber surface (with or without metal plates) ensures water tightness at the joint level, without any need for additional water removal devices before surface level. Thus, rubber expansion joints can be installed on the thinnest structural slabs and bridge decks.

Finger Expansion Joint

High performance steel expansion joint that allows the absorption of deck movements while bearing the traffic loads and avoiding traffic disturbances. The steel fingers provide a robust surface for traffic with low noise, and can be tailored to allow a great variety of movements.

Pedestrian Expansion Joint

Steel plate expansion joint, It consists on a mechanically sealed steel plate expansion joint designed for pedestrian traffic on bridge kerbs, as well as pedestrian bridges. It’s formed by a continuous steel plate, allowing a safer surface for the users, which slides above a second steel plate linked to the kerb surface. An elastomeric seal is mechanically locked into the cavity of steel extrusions to prevent the ingress of water or debris. Below the steel plates, anchorage is affixed to be attached to the structure elements by a typical method of pouring high-strength concrete mortar, or other elastomeric mortar.This armored joint system is designed to cater for movement matching those of the main expansion joints, with an exterior surface conveniently treated to prevent trips and slips by the users.

Simple Expansion Joint

Simple Expansion Joint, is a mechanically sealed joint with an extruded elastomeric seal retained by various options of profiled steel extrusions, often referred to as edge beams or steel rails. The elastomeric seal, usually named strip seal, is mechanically locked into the cavity of steel extrusions to prevent the ingress of water or debris. At the side of steel extrusions, anchorage is affixed to be attached to the structure elements by a typical method of pouring high-strength concrete mortar, or other elastomeric mortar.This armored joint system is designed to cater for movement ranging from 0mm to 100mm, while movements and rotations in all three axes are possible without any restraints.

Elastomeric Expansion Joint

High-performance rubber expansion joint that allows the absorption of deck movements and the evacuation of water, supporting traffic loads and avoiding traffic disturbances. The continuous rubber surface (with or without metal plates) guarantees watertightness at the joint level, without the need for additional water evacuation devices before the surface level. Thus, rubber expansion joints can be installed on the thinnest structural slabs and bridge decks.

Pedestrian Expansion Joint

The steel plate joint is a mechanically sealed joint designed for pedestrian and bicycle traffic on bridge curbs as well as pedestrian bridges. It consists of a steel plate providing a continuous surface for users which overlies another steel plate inserted into the curb surface. An elastomeric seal is mechanically locked into the cavity of the steel extrusions to prevent the ingress of water or dust. An anchor is provided beneath the steel plates which is fixed to the structural elements by a typical method of pouring high strength concrete mortar or other elastomeric mortar. This reinforced joint system is designed to accommodate movements coinciding with those of the main expansion joints, with an exterior surface suitably treated to prevent tripping and slipping by users.

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