The Optimal Combination of Anchors and Lifting Systems in Precast Construction

Precast concrete has become one of the cornerstones of modern construction. Its efficiency, repeatability, and ability to deliver high-quality structures in a controlled environment have made it the preferred method for infrastructure, commercial, and residential projects worldwide. However, despite its many advantages, precast concrete also presents unique challenges—particularly when it comes to lifting, transporting, and installing heavy, often irregularly shaped components.

The success of precast construction depends not only on the quality of the concrete components themselves, but also on the systems used to handle them. Anchoring devices and lifting accessories must be carefully matched to ensure safety, stability, and efficiency. Mismatches can lead to dangerous stress concentrations, cracking of concrete components, and even accidents.

This article explores three anchor and lifting accessory combinations that have demonstrated exceptional performance in precast construction:

Lifting clutch & lifting anchor

Lifting ring clutch & spread anchor

Lifting point & wavy tail anchor

Each combination is designed to maximize performance under specific conditions. By understanding their functions, advantages, and applications, contractors and engineers can make more informed decisions and optimize lifting operations.

Lifting Anchor + Lifting Clutch: Safely Handling Heavy Precast Components

The Function of the Lifting Anchor

Lifting anchors are sturdy steel components embedded in precast concrete components. They are designed to carry heavy loads, evenly distribute stress, and provide a secure connection point for lifting equipment. Lifting anchors are hot-forged using round steel (such as Q345, 20Mn2, CM490, and stainless steel) with a triple safety factor, capable of withstanding high tensile forces. Once installed, they remain concealed within the concrete. HULK Metal kindly reminds you to inquire whether the lifting anchor is hot-forged or cold-forged when purchasing it to avoid quality issues that could compromise construction safety.

These anchors are widely used for components such as slabs, beams, and blocks, where structural integrity is paramount during handling.

The Function of the Lifting Clutch

The lifting clutch is a removable device that locks onto the head of the lifting anchor. This design allows the operator to quickly engage and release the clutch without the need for tools, ensuring efficient and safe transfer of the load from the anchor to the lifting equipment.

The versatility of the lifting clutch lies in its ability to be reused on multiple anchors, reducing overall operating costs.

Installation Process

Positioning with Recess Former

Begin by selecting the designated location on the concrete block formwork where the Spherical Head Anchor is to be embedded.

Secure the Recess Formerly firmly to the formwork, ensuring that it holds the anchor in the correct orientation and depth.

Concrete Pouring and Curing

Once the anchor is in place with the recess former attached, proceed to pour the concrete mixture into the formwork.During pouring, ensure that the concrete fully encapsulates the anchor body, leaving only the recess area protected by the former.

Removal of the Recess Former

After the concrete has fully set and reached the required strength, carefully detach and remove the Recess Former. This removal process reveals a clean and precisely shaped recess at the anchor’s head, designed to accommodate the lifting clutch.

Combination advantages

The lifting anchor and lifting clutch are used together to form a highly reliable, safe and efficient lifting solution:

Enhanced safety: Secure locking mechanism reduces the risk of accidental disengagement.

Time Efficiency: Quick connection and release simplify lifting operations.

Load Optimization: Stress distribution minimizes damage to precast components.

Flexibility: Suitable for panels, blocks, beams, and various structural members.

Typical Applications

This combination is particularly important in projects involving heavy or large components, such as bridge beams, industrial panels, or large foundation blocks. Their ability to provide stable performance under high loads makes them the preferred choice for critical lifting operations.

Spread Anchor + Lifting Ring Clutch: Provides stability for thin or wide concrete components

Features of Spread Anchors

Spread anchors utilize a unique geometric design that distributes loads over a larger surface area. Each spread anchor is laser-cut and precision-welded, ensuring precise alignment of the lifting ring clutch. They are ideal for thin or wide precast components that are more susceptible to stress damage. Unlike traditional anchors that concentrate force in a small area, spread anchors minimize the risk of localized cracking.

Spread anchors are often embedded in wall panels, facade elements, or slender building structures, providing stability and reliability where traditional solutions may struggle.

The Role of a Lifting Ring Clutch

A lifting ring clutch is a highly flexible accessory that rotates 360°, allowing components to be lifted from a variety of angles. Its versatility ensures that even heavy or wide components can be lifted safely without excessive stress.

Designed with durability and user-friendliness in mind, the lifting ring clutch is the preferred choice for repetitive lifting tasks.

Installation Process

Removing the formwork sections

Before lifting the precast concrete unit, as many sections of the formwork as possible should be removed in order to minimize adhesion to the formwork. Inadequate stripping is the most common cause of flaking of the precast concrete unit or of anchor failure. The

forces acting on the lifting system may be several times the actual weight of the precast unit.

Removing the recess formers

To strip the recess former, two rods are inserted in the holes in the recess former, which is then levered out by scissors action. This technique will guarantee a long life time for the recess former. Attempting to remove the recess former using the tip of a carpenter’s hammer will destroy it.

Fitting the ring clutch

To transport an element, insert the suitable ring clutch for the load group over the anchor head in the concrete recess. The load ranges are foolproof.

Locking the ring clutch

Securely lock the ring clutch with a straightforward hand-operated movement of the locking bolt. The resulting connection is secure, allowing the ring clutch to move freely in any direction. The precast element can now be safely lifted out of the formwork and transported to its storage location

Assembly

A primary advantage of the HULK Metal Rapid Lift System is that the

slinging devices (ring clutches) remain attached to the crane hook and do not need to be transported by hand.The ring clutch can be released

manually by pushing back the locking bolt once the device is off-loaded.

Tilting slabs without tilting the table

The hulk metal ring clutch can be used to move flat-manufactured precast units from a horizontal to a vertical position. The direction of the pull is at right angles to the built-in anchor.To avoid flaking of the concrete, the erection anchor should be properly embedded in the unit. The use of cross-beams when lifting is recommended to avoid torsional forces.

Combination advantages

Combine spread anchor with lifting ring The clutch combination offers several key advantages:

Load distribution: Prevents damage to thin-walled or wide components.

Rotational flexibility: Allows safe lifting in various directions.

Reduced risk of cracking: Ensures structural integrity during handling.

Efficiency: Simplifies complex lifting tasks.

Practical Applications

This combination is particularly suitable for building panels, thin concrete walls, and decorative elements requiring both structural protection and aesthetics. It also offers the following benefits:

It is also effective when tilting or rotating the lifting element during installation.

Wavy tail anchor + lifting point: Reliable anchoring under dynamic loads

Features of the wavy tail anchor

The wavy tail anchor is distinguished by its wavy or corrugated tail design, which significantly enhances its bond with the concrete. The increased surface area and irregular shape ensure that the anchor is securely locked into the concrete, reducing the risk of pullout under high loads.

This design makes the wavy tail anchor particularly effective for elements subjected to dynamic forces, such as stairs, columns, or elements with non-standard geometries.

Function of a lifting point

A lifting point is typically a fixed or swivel eye, used to securely connect a chain.They can be used with bars, slings, or hooks. They are engineered to withstand vertical and angular loads, making them highly adaptable for complex lifting operations.

Lifting points provide precise control, ensuring the safe lifting, tilting, or rotation of precast elements.

Installation Process

Preparation and Inspection

Confirm the lifting plan, including load weight, direction of forces, and lifting angle.

Inspect the wavy tail anchor to ensure it is properly embedded in the precast concrete element and free from visible damage.

Check the lifting point (fixed eye or swivel type) for wear, deformation, or cracks.

Alignment of Lifting Equipment

Position the crane hook, chain, or sling directly above the lifting point to avoid side-loading.

Ensure that the lifting device matches the rated capacity of both the anchor and lifting point.

Attachment of Lifting Point

Securely fasten the lifting point to the wavy tail anchor’s exposed section.

For swivel lifting points, make sure the rotational mechanism moves freely before applying load.

Tighten connections according to manufacturer’s torque specifications if bolts are used.

Load Application

Apply load gradually to confirm that the lifting point and anchor engage correctly.

Maintain proper lifting angles (usually within 0–45° (depending on design) to prevent excessive stress.

Monitor for any unusual movement, slipping, or deformation.

Safe Lifting and Handling

Lift the precast element slowly and steadily, avoiding sudden shocks or jerks.

If tilting or rotating is required, ensure the lifting point is designed for angular loads.

Keep personnel clear of the lifting zone at all times.

Post-Lifting Check

After placement, carefully detach the lifting equipment from the lifting point.

Inspect the lifting point and anchor for any signs of stress before reuse.

Record lifting data as part of quality and safety documentation.

Combined Advantages

When used with a lifting point, the wavy tail anchor system provides unparalleled reliability:

Excellent concrete bond: The wavy tail design effectively prevents pullout.

Adaptable: Easily handles dynamic and angular loads.

Enhanced Safety: A robust mechanical interlock minimizes risk.

Versatility: Suitable for stairways, columns, and irregularly shaped components.

Applications

This combination is ideal for components subject to high stresses or requiring complex handling during installation. For example, precast stairways, slender columns, or specialized building structures can benefit greatly from this combination's enhanced performance.

Choosing the Right Combination: Safety, Efficiency, and Cost Optimization

Selecting the right anchor and lifting accessory combination isn't a one-size-fits-all approach. To ensure optimal performance, several key factors must be considered:

Load Capacity and Force Direction

Understanding the weight and direction of the load ensures the selected system can safely withstand the force.

Component Geometry and Thickness

Thin plates require anchors that distribute force widely, while heavy blocks require concentrated strength.

Handling Environment

Factors such as lifting frequency, rotational requirements, and dynamic loads all influence the selection of the optimal combination.

Cost-Effectiveness

While safety is paramount, choosing reusable accessories, such as lifting clutches, can reduce long-term operating costs.

By evaluating these factors, contractors and engineers can significantly mitigate risk while maximizing efficiency and cost-effectiveness.

Why partner with HULK Metal for anchoring and lifting solutions?

Leveraging decades of expertise in forging and precision engineering, HULK Metal is a trusted global supplier of anchoring and lifting systems. Partnering with HULK offers many advantages:

Advanced Manufacturing Capabilities

Advanced forging and machining technologies ensure consistent, high-quality anchors and accessories.

Comprehensive Product Line

A full range of lifting anchors, clutches, spread anchors, wavy tail anchors, and lifting points ensures compatibility and flexibility.

Compliance with Global Standards

All products meet or exceed international standards, including ISO, CE, and EN certifications, ensuring safety and reliability.

Tailored Project Solutions

Customized engineering support ensures every project benefits from optimized anchoring and lifting solutions.

By integrating HULK's systems, contractors can achieve safe, efficient, and cost-effective precast construction outcomes.

Anchoring and lifting systems are critical to the safety and efficiency of precast construction. By carefully selecting the right anchor bolts and combining them with the appropriate lifting accessories, engineers can overcome the challenges of handling heavy, thin, or irregular concrete elements.

Lifting anchors with lifting clutches provide strength and efficiency for heavy elements.

Spread anchors with lifting ring clutches provide stability for thin or wide structures.

Wavy tail anchors with lifting points offer unparalleled reliability under dynamic loads and complex geometries.

Using these combinations correctly not only improves safety but also streamlines workflows and reduces costs. By choosing HULK Metal as a partner, construction companies can trust our proven solutions, backed by advanced manufacturing processes, compliance with international standards, and a commitment to customer success.

For projects where safety and precision are crucial, rely on the synergy of anchor bolts and lifting systems—trust HULK Metal.