EuroWire November 2021

Products

Bolt-adjusted manhole levelling solutions RimRiser adjust-to-grade systems for manholes, catch basins and precast tops are now available from RimRiser and from foundries, pre-casters and civil infrastructure suppliers in major markets. like RimRiser can provide a simple, cost- effective and precise way to improve or ensure flushness, the pavement around utility access points will last longer, which will save money in the long run.”

Levelling of manholes and other surface- level infrastructure can be a time-consum- ing process that requires multiple people and often relies on potentially unsafe and imprecise methods like using pry bars and shims, which can break down over time. RimRiser solutions use a patented four- bolt system that allows a single crew member to precisely level the riser to the specified grade using a standard 5 / 8 -inch nut driver. This makes it easy to set it right the first time and to adjust, if needed. RimRiser is safer to install than traditional methods because it eliminates hazards from lifting with bars, overhead machines or slings and prevents accidental drops on hands or fingers. The patented bolts are small enough to fit in a pocket, making them easy to store and carry. RimRiser- ready castings all use the same bolt- adjustable system.

RimRiser’s bolt-adjusted riser technology makes the process of levelling cast iron manhole rings, inlet frames/grates and precast concrete tops easier, faster and more accurate. By reducing the crew, time and equipment required to ensure that utility covers, grates and tops are precisely levelled to grade, RimRiser streamlines the paving process, keeps traffic moving smoothly and protects roads from unnecessary wear that results from utility covers that are too high, too low or shift over time. “Ensuring that manholes, catch basins and handholes located in roads and other paved surfaces are flush with the surrounding pavement is essential for long-term pavement durability, driver satisfaction and reduced vehicle wear and tear,” said John Hickey, executive director of the Asphalt Paving Association of Oregon. “To the extent new technologies Hilti North America, a commercial construction-focused technology, soft- ware and services company, has expanded its concrete anchor portfolio with the launch of Kwik Bolt-TZ2, a mechanical anchor that is easier to install and can be used in more application and job-site conditions. The innovation is intended to make design easier for engineers and contractors, delivering up to 20 per cent higher tension performance and approvals, while optimising edge distance and spacing. “It was a natural progression to take the expansion anchor further to provide an even more optimised fastening solution,” said Rafael Lorenzo Santos, senior director of fastening and protection at Hilti North America. “As job sites become more complex, installing anchors correctly the first time is key to help ensure safety and productivity. With KB-TZ2, Hilti has set a new standard for what an expansion anchor can do.” Taking the time to ensure a safer anchor design requires a thorough review of the

▲ The system uses adjustable bolts that are set using a power tool

“We used to use bricks, wedges or wood shims, but it took a lot more time to set manholes to grade, and in time the bricks and shims would either break down or rot out and the manholes would typically sink,” said David Coffey, crew leader, wastewater for the City of Vancouver, Washington, USA.

“With RimRiser, I like how quick and easy it is to set to grade simply using a power tool to set it into place. And when we grout the inside, it seals with the sturdy bolts in place, providing a strong base for the castings to sit on.” RimRiser, Inc www.rimriser.com Easy-to-install wedge anchor to cover more applications and job-site conditions

Additionally, the KB-TZ2 has improved embedment depths for the thinnest of slabs and an expanded portfolio, with 94 different diameter and length options, offering the right size anchor for more applications. This includes the first quarter-inch and one-inch diameter seismic-approved expansion anchors. Modifications to the cone angle and geometry allow the KB-TZ2 to efficiently expand, while the sleeve design produces a higher undercut percentage in the concrete. Specialised bolt and nut coatings help prevent over-torqueing and provide better pre-tension control to reduce the expansion forces transferred to the base material. Hilti offers a range of technical support services to help customers evaluate and specify its products. The KB-TZ2 is available now throughout the USA and Canada, and for specifications in PROFIS Engineering. Hilti www.hilti.com

▲ Hilti’s KB-TZ2 wedge anchor aims to make design easier

specific applications and load require- ments. The use of complex anchors, such as epoxy or heavy-duty mechanical anchors, can be labour intensive and expensive, which can lead to complex anchor redesign requests from project owners or contractors. The Kwik Bolt TZ-2 has been designed to help make anchoring easier by being the only fractional expansion anchor to offer diamond core hole approvals, a combination drill bit that reduces fatigue on the installer and compatibility with Hilti’s Adaptive Torque module, which helps increase installation quality.

EF 7/61

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November 2021