LIEBIG
HURRICANE CLOSE
SHERBURN ENTERPRISE PARK
SHERBURN IN ELMET
LEEDS
WEST YORKSHIRE LS25 6PB
Tel: 01977 687040
Fax:
Suppliers of: Undercut Anchor Bolts, Anchor Bolt, Safety Bolts
When the EJOT fastener manufacturing Group acquired the LIEBIG brand in 2017, it made a commitment to provide full accessibility to the LIEBIG product range and the technical data that supports it.
The unique modular design and absolute strength of LIEBIG anchoring products is well known by structural engineering professionals around the world. The LIEBIG brand has an unrivalled reputation to deliver outstanding strength and performance in its unique portfolio of anchoring products. Now this proven technology is part of EJOT’s own manufacturing excellence and specification support facility around the world, making LIEBIG products and the technical guidance to support them openly accessible.
For structural engineers, being less familiar with the EJOT brand is understandable, unless career paths have included sorties into the numerous sectors that comprise industrial roofing, cladding and insulation. Designing and manufacturing fastening solutions for this domain is EJOT’s world.
LIEBIG anchoring technology and EJOT’s manufacturing and technical support is now one market force. LIEBIG products are hallmarked classics and the modular nature of the range makes all LIEBIG anchors easy to adapt and easy to create bespoke lengths and assemblies quickly, efficiently and cost-effectively. All LIEBIG anchors have Option 1 and Option 7 ETA approvals for cracked and non-cracked concrete.
For use where safety is paramount, typical applications include installations into nuclear power plants, cranes, industrial plants, conveyor systems and also for special civil engineering solutions.
Together EJOT and LIEBIG are making this unique anchoring technology and the technical knowledge to support specification readily accessible; putting the LIEBIG product range firmly back in the hands of the engineer.
Our Product Range Includes:
Ultraplus M12 - M36:
The LIEBIG ULTRAPLUS® anchor offers the highest tensile and shear performance of any other undercut anchor, from 320KN tensile load and beyond!
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LIEBIG® Ultraplus - Anchoring of Steel Structures and Baseplates in Nuclear Power, Oil, Gas and Water Treatment. The Ultraplus ZP can be installed in the most Heavy Structural Applications.
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LIEBIG® Ultraplus A4 - The undercut anchor for exceptionally high loads in cracked and non-cracked concrete – also for shock and seismic loads.
SAFETY BOLT M6 - M20:
The LIEBIG Safetybolt design with its double expansion gives optimal frictional resistance for a strong and controlled installation giving you a more secure performance for steel construction, ligfting systems and more. With it’s high load capacity the LIEBIG Seafetybolt is second to none.
- LIEBIG® Safety Bolt B - Double expansion, heavy duty anchor for increased security
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LIEBIG® Safety Bolt B A4 - A solid steel safety bolt available with a hex nut, domed washer and threaded stud or a hex head screw with domed washer or even with a countersunk headed screw for a flush finish this high capacity anchor can be used in both cracked and non-cracked concrete.
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LIEBIG® Safety Bolt S A4 - With its uniformed expansion of the sleeve over the entire length, Solid all-steel construction and torque indication from domed washer the Liebig safety bolts performance is second to non. With custom lengths available on request you can be assured that we have the best solution for your project.
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LIEBIG® Safety Bolt SK - Application of the installation torque causes the anchor’s two opposing cones to be drawn into the expansion sleeve. This causes the sleeve to be pressed against the sidewalls of the hole over its entire length and results in optimum frictional resistance and high load capacity in cracked and non-cracked concrete.
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LIEBIG® Safety Bolt SK A4 - With cylindrical expansion for optimal friction resistance, higher anchoring intensity from twin-cone design and torque indication from domed washer the Liebig safety bolt gives you peace of mind.
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LIEBIG® Safety Bolt S - A twin-cone sleeve anchor for high loads, Torque-controlled mechanical anchor manufactured in a Solid, all-steel construction suitable for use in both cracked and non-cracked concrete.
LIEBIG ANCHORBOLT M6 - M16:
The LIEBIG Anchor Bolt is a general purpose, heavy duty anchor for use with high loads and high economic capacity. The unique design gives torque indication for a presice and controlled installation.
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LIEBIG® Anchor AB A4 - Used for fFixing down of steel baseplates, columns and structural steel beams in both cracked and non-cracked concrete this Liebig anchor gives you the performance you need.
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LIEBIG® Anchor AS - General purpose heavy duty anchor. This is an economical anchor for wide range of uses complete with torque indication from its domed washer.
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LIEBIG® Anchor AS A4 - An economical high capacity anchor approved for use in cracked and non-cracked concrete. Some of the applications this great anchor can be used in include Steel construction, Cable trays, Railing, Machines, Gates, Façades, Lifting systems and Base plates to name but a few.
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LIEBIG® Anchor AB - A carbon steel zinc plated anchor, ETA approved for cracked and non cracked concrete complete with hex nut. Available in thread size M6 to M16 and as well as standard lengths special lengths are also available.
SUPERPLUS M8 - M16:
The LIEBIG SUPERPLUS® anchor is an undercut anchoring system that does not require any special setting tools. An undercut anchor with the ease of installation of an expansion anchor you only need apply torque to create the self-undercut.
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LIEBIG® Superplus BLS - The undercut fixing system that does not require a special setting tool.
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LIEBIG® Superplus BLS A4 - Automatic self-undercutting. The unique design of the SUPERPLUS causes an undercut to be created when the installation torque is applied. The sleeve’s outer cutting teeth expand and undercut into the base material.
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LIEBIG® Superplus BLS P - High capacity anchor for cracked and non-cracked concrete the Liebig Superplus has Increased reliability due to undercut technology.
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LIEBIG® Superplus ILS - A high capacity anchor for cracked and non-cracked concrete with increased reliability due to undercut technology. Simple installation, no special drill bit or setting tool required while applying torque creates undercut thus allowing reduced edge distances and spacings. With two approved embedment depths per diameter the Superplus boasts a lower installed cost than traditional undercut anchors. Approved for fire resistance.
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LIEBIG® Superplus SLS: A self-undercutting anchor with hexagon screw and washer. The Liebig Superplus SLS boasts automatic self-undercutting and is a unique heavy-duty anchor for push through installations. The Superplus SLS is the simplest, quickest and safest solution on the market.
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LIEBIG® SUPERPLUS SKLS - An automatic self-undercutting, unique heavy-duty anchor for push through installation with threaded bolt, countersunk screw and countersunk insert. For indoor and outdoor areas, as well as industrial applications.
For more information or technical downloads please visit our website:
- ULTRAPLUS - The undercut anchor for exceptionally high loads in cracked and uncracked concrete
- ANCHOR - High Capacity General Purpose Anchor
- SAFETYBOLT - Twin-cone heavy duty anchor for high-power performance
- SUPERPLUS - The undercut fixing system that does not require a special setting tool.
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High performance critical fastening with first class, full technical support.
From Barnsley to Great Yarmouth via New York! LIEBIG Ultraplus anchors bridge the gap
Heavy duty LIEBIG Ultraplus undercut anchors, which are believed to be the largest mechanical anchors ever used in a civil engineering project, have played a key role in the construction of a bridge in East Anglia.
Constructed by BAM Farrans, the new £121m Third River Crossing over the River Yare in Great Yarmouth is set to be a catalyst for investment and development in the coastal town. It provides a new link from the A47 to the port and enterprise zone on the east side of the river, easing traffic congestion on the town’s roads, shortening journey times and improving journey reliability.
The double bascule bridge - now named The Herring Bridge - was designed by globally-renowned infrastructure engineering specialists Hardesty & Hannover, based in New York. Their design features cofferdams on both banks of the river to house the machinery and mechanisms required to lift, hold and lower each leaf of the bridge, and it was here where LIEBIG heavy duty anchors were deployed.
Working with bridge design specialists Roughan & O’Donovan (ROD) and project engineers Qualter Hall, the LIEBIG Ultraplus undercut anchor from EJOT UK was identified as the preferred solution for this high load application. A series of these mechanical anchors were installed in lengths of 1.09m and 1.45m with an M36 diameter after the hole preparation was completed by drilling specialists Core Cut.
A mix of the two anchor lengths were used on the same baseplates in an unconventional yet successful approach, securing eight baseplates in total – four on each side of the river. Two baseplates on each side of the river were mounted into the “lower” clevis to secure the lifting and lowering hydraulics.
The mechanism also features tail locks which secure the turnbuckles that hold the bridge in its ‘raised and open’ position for prolonged periods, such as for maintenance, which are designed to take loads in excess of 192 tonnes per plate (384 tonnes total) per side.
Explaining how this mix of anchor lengths provided the solution, EJOT UK’s anchoring specialist, Paul Papworth said:
“Whilst the ETA for Ultraplus does not legislate for such a permutation, i.e. using different lengths of anchor in the same baseplate, the ACI (American Concrete Institute) Building Code does because it takes into account the additional area of resistance in the concrete which can be created by the approach. This meant our anchor specification for the Third River Crossing, in conjunction with our advised redesign of the baseplate to allow increased concrete capacity to be achieved, would be approved using a combination of different design codes.”
The project was not without its challenges, largely as a result of multiple components coming together ‘when ready’ rather than ‘when scripted’. With the input of Paul and the EJOT team, however, any problems which arose during installation could be resolved collaboratively without having an adverse effect on the build schedule or budget.
In addition to the very large anchors used to securely fix the operating machinery in place, a series of smaller M16 and M20 LIEBIG Ultraplus anchors were also deployed to attach the bridge deck’s metal transition plates. These allow for a smooth passage for vehicles and pedestrians between the bridge deck and the newly constructed highway and footpath on either bank of the River Yare.
BAM’s Section Engineer Chris Griggs was impressed in EJOT’s ability to provide onsite support and guidance to achieve the correct application of these critical elements.
Chris commented: “Paul and his team raised the bar on this project in terms of what we should expect from our anchoring partner, particularly in terms of the toolbox talks and availability onsite to solve any problems throughout the process. It was good to be involved in a project where the anchoring ‘experience’ was refreshingly different, and we have so many positives to take away and apply in our future projects.”
LIEBIG ULTRAPLUS® Earthquake & Seismic Anchors
Earthquakes are more prevalent than we think. We might not feel them, but they occur every day in different parts of the world and in different magnitudes. The earthquake risk factor varies from place to place depending on where the region falls on the seismic risk maps. Additionally, certain types of structures such as nuclear installations and sites where failure of an installation has high consequential risk associated with it, also require the use of seismic anchors to be considered.
Certain type of substrate and structures not built to withstand seismic movements are some of the factors that increase the effects of earthquakes. Consequently, even the occasional weak seismic shifts can cause significant damage to property and life in such areas.
Currently, engineers use earthquake anchors in structures that have a high number of people or are in seismically active zones. They also use them in places that are crucial for post-disaster recoveries such as hospitals, bridges, and fire stations used in structures constructed using concrete.
Anchor services
Earthquake anchors are designed to manage the increased load effect created on them by earthquakes. The process of anchor design and selection requires vast experience in the seismic design for structural as well as non-structural building elements. Seismology professionals also provide consultation services for building projects in regions where earthquakes are a crucial consideration.
The design takes into consideration several factors such as the relative displacement and maximum earthquake load demands. Engineers ensure there is no point of weakness on the connection between the structure and the seismic wedge anchors. Additionally, they design concrete floors, walls and ceilings to withstand the locally induced seismic forces.
Once an anchor is ready, technicians use specially designed seismic anchor bolts, welds, cleats, gusset plates and brackets to hold the structure. They ensure that all parts of the supporting structure are fixed in such a manner that all the seismic forces on the building are correctly managed and transferred to the seismic wedge anchor.
Compliance
By understanding the value of life and property at risk, people must strictly adhere to the existing Standards on seismic loads and fixings.
