INFRA-RISER® Rubber Composite Adjustment Riser by EJ

Rubber Composite Adjustment Risers play a vital role when it comes to the lifespan of a manhole and access structure. INFRA-RISER® is a rubber composite adjustment riser designed and manufactured by EJ. INFRA-RISER® reduces traffic vibration damage - prolonging the lifespan of manhole structure and the surrounding road or pavement.

Vehicles cause chronic stress on manhole frames. As time passes by and two inelastic surfaces constantly come into high-stress contact with each other, the impact and friction between the two gradually damages the surface of the road surrounding the manhole. The damage is often worse below the surface causing permanent damage to the manhole structure and its attached network.

Made of 92% recycled raw materials such as recycled rubber tyres, urethane binders, and fortifying additives, INFRA-RISER® rubber composite adjustment riser is an environmentally friendly material that helps lessen traffic vibration damage. Due to its compression properties, it acts as a stabiliser and accessory that uniformly distributes the traffic loads over the entire support surface rather than concentrating all that friction and impact in specific high-stress areas.

The INFRA-RISER® rubber composite adjustment riser also dissipates the energy transferred amongst the casting and the manhole frame. Because the adjustment riser separates the surfaces, the stress component is drastically reduced enabling the two elements to work together, as opposed to working against each other. This helps maintain the integrity of the infrastructure support system.

INFRA-RISER® will not split, break, crack, rot, or chip and will last indefinitely; making it the ideal tool for Local Governments aiming to supersize the performance and prolong the lifespan of infrastructures, while at the same time, achieving significant cost savings.

INFRA-RISER® by EJ comes in a variety of designs. Square, round, and rectangular designs are available as well as flat and tapered risers and some even come in bolt hole patterns.

Though the primary purpose of INFRA-RISER® is to protect the manhole frame and its surrounding pavement from damage, it also acts as an anti-water infiltration accessory. Uneven planes allow water to enter rigid and irregular surfaces like brick and mortar or concrete. This issue is compounded with the lack of stability of a shimmed joint where foreign materials and particles become displaced to enable greater amounts of water to seep in. The key to reducing this water infiltration is to have a tight seal. When fixed according to the guidelines, INFRA-RISER® can help prevent the passage of water infiltration. They make a virtual tight seal sandwiched between the manhole chimney structure and the manhole frame.

How to Install INFRA-RISER® by EJ
The installation process of INFRA-RISER® is simple and easy:

1. Apply a continuous strip of polyurethane joint sealer/adhesive with the thickness of 8mm - 10mm on the top surface of the brick course or concrete structure. It is placed on a diameter of 25mm smaller than the inside or outside diameter of the INFRA-RISER® rubber composite adjustment riser.

2. Position the adjustment riser in place, making sure that it is centred over the top surface of the brick course or concrete surface of the utility hole structure or catch basin.

3. Apply a second continuous strip of polyurethane joint sealer/adhesive with a thickness of 8mm - 10mm on top of the upper surface of the rubber adjustment riser and should be 25mm smaller than the inside or outside of the frame. A continuous strip of adhesive/sealant should be laid between each ring if more than one rubber riser is used.

4. Position the frame of the catch basin or manhole at the centre of the structure opening. Place the bottom of the frame onto the adjustment riser. Apply firm pressure to the frame by pressing it down to create a tight seal with the sealant and the adjustment riser.

INFRA-RISER® rubber composite adjustment riser is the simple, efficient, economical, and long-lasting solution for utility hole structure damage issues.

By incorporating their core values into their work ethic and translating this excellence into every product they release, EJ is committed to delivering high quality access solutions. This dedication has led them to become one of the leaders in manufacturing, distributing and designing infrastructure access solutions worldwide.

Learn more about INFRA-RISER® and other quality EJ products by heading over to www.ejco.com.