MTP-G Wedge Anchor — Hot-Dip Galvanized

Galvanized wedge anchor for cracked concrete holding European ETA1 approval — for outdoor, marine and humid environments. Same performance as MTP-X with a 30-40 micron thermodiffusion coating.

Thermodiffusion galvanizing 30-40µETA1 — Cracked concreteSeismic C1-C2Fire rating F120Sprinklers — VdSOutdoor & marine

The Adit wedge anchor family

Choose the right wedge anchor for your substrate, environment and approval requirements.

MTP-XCracked concrete · ETA1 · Seismic MTP-GHot-dip galvanized · Outdoor & marine MTP A4Stainless steel SS316 · Cracked concrete MTHUncracked concrete · ETA7 MTH A4Stainless steel SS316 · Uncracked ORAZinc-plated · Standards Institute lab test

Technical specification

Property	MTP-G — galvanized wedge anchor, European approval
Characteristics	Galvanized wedge anchor for cracked and uncracked concrete
Technology	Wedge anchor · Thermodiffusion galvanizing 30-40 micron
Corrosion protection	Hot-dip / thermodiffusion galvanizing — for outdoor, marine and humid environments
Cracked concrete	Yes
Dynamic loads	Yes
Seismic	Yes — C1 and C2
Fire rating	Yes — F120
Sprinklers	Yes — VdS approval
Standards	European ETA1 approval for cracked concrete, sprinklers and seismic

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Proven in the field — selected projects in Israel

The MTP wedge anchor series is installed in hundreds of projects across Israel.

Totzeret Ha’aretz, Tel Aviv

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Instructional & field videos

Galvanized wedge anchor (cone anchor): the complete guide

Looking for a reliable, strong and cost-effective anchoring solution for heavy structures in challenging environmental conditions? The galvanized wedge anchor — also known professionally as a cone anchor — is the preferred choice of engineers in Israel and worldwide. This guide was written by the experts at Adit Ltd.

The ADIT MTP-G is a steel cone anchor that meets a stringent European standard, manufactured through a rigorous, controlled production process. With decades of experience and installations worldwide, it proves its durability time and again under complex field conditions, especially given the weather and humidity of the Israeli climate.

How does a wedge anchor (cone anchor) work?

A wedge anchor is a mechanical, through-set expansion anchor designed to fasten steel structures, equipment and heavy machinery to concrete. After drilling the hole, inserting the anchor and tightening the nut, the lower expansion clip (the “skirt”) opens, sets and is forced toward the cone. This creates a strong, rigid and secure anchorage capable of carrying very high tensile and shear loads. Thanks to quick, simple installation, high reliability and enormous load capacity, wedge anchors have served for decades as one of the most common anchoring solutions in construction and industry.

Key advantages of the ADIT MTP-G galvanized wedge anchor

Approved for cracked concrete: designed and approved as a wedge anchor for cracked concrete and for seismic (earthquake) conditions.
Maximum corrosion protection: a 30-40 micron thermodiffusion galvanized coating (Sherardizing) provides phenomenal resistance to rust and corrosion — ideal for coastal areas, industrial environments and humid regions.
Quick and simple installation: significant savings in on-site working time.
Immediate loading: unlike a chemical anchor, there is no need to wait for curing — load can be applied immediately after tightening the nut.
High load capacity: excellent tensile and shear performance for heavy projects.
Wide range: available in a variety of diameters and lengths for a precise fit to every application.

What is cracked concrete and why does it matter?

Cracked concrete is a common engineering condition in which there is a high probability of a microscopic crack (up to 0.3 mm) appearing in the tension zone of the concrete, exactly where the anchor is installed. This crack may develop from tensile loads, structural settlement, temperature changes, earthquakes, or the force the anchor itself exerts.

Whenever the engineering design defines the connection area as a “tension zone” or “cracked concrete”, it is mandatory to use a wedge anchor for cracked concrete. A galvanized wedge anchor for cracked concrete such as the MTP-G is equipped with a special flexible expansion mechanism that “rides” on the cone and adapts to movement and to the opening of the crack, so the anchorage remains stable, safe and durable and continues to carry load even if the crack widens and contracts.

Common applications

The ADIT MTP-G galvanized wedge anchor for cracked concrete is especially suitable when a strong, fast and durable mechanical connection is required in outdoor conditions with engineering certification (ETA). It is used to anchor:

Curtain walls and structural cladding
Safety railings and balconies
Heavy steel structures to concrete buildings in coastal areas
Vibrating machinery and heavy industrial equipment in humid environments
Piping runs, ventilation ducts and service systems in ceilings
Storage and logistics facilities and heavy-duty racking systems
Steel posts, pergolas, electrical cabinets and communications equipment

How to choose the right galvanized wedge anchor

Choosing the right cone anchor depends on the type and strength grade of the concrete (C20/25 and above), the magnitude and direction of the loads (tension and shear), distances from the concrete edge, spacing between neighbouring anchors, and the project’s regulatory requirements. In projects requiring anchoring in cracked concrete, a demand for seismic resistance (C1/C2), or special approvals for fire protection and sprinklers, it is mandatory to choose a wedge anchor for cracked concrete with official ETA approvals such as the ADIT MTP-G.

Frequently asked questions

What is the difference between MTP-G and MTP-X?

MTP-G is identical to MTP-X in performance and approvals — the same ETA1 for cracked concrete, the same C1-C2 seismic approval, the same F120 fire rating and the same sprinkler approval. The difference is the 30-40 micron thermodiffusion galvanizing, which provides far greater corrosion resistance for outdoor, marine and humid environments.

What is the difference between a wedge anchor and a cone anchor?

There is no difference. “Cone anchor” is the professional/engineering name for a wedge anchor. The term “wedge” is common among field workers, while “cone anchor” is more common in engineering specifications and describes the cone shape at the end of the bolt, on which the expansion clip (the “skirt”) rides.

When should you use a wedge anchor instead of a chemical anchor?

The huge advantage of a wedge anchor is speed: the moment you drill the hole and tighten the nut to the correct torque, the anchor is immediately ready to carry a full load. With a chemical anchor you must wait hours for the material to cure. For a dry, clean installation on hard, stable concrete with a tight schedule, the wedge anchor is the most economical and efficient solution.

Is the MTP-G earthquake-resistant?

Yes. The MTP-G holds the strictest engineering approvals in Europe (ETA), including seismic (earthquake) approval in categories C1 and C2. This is especially important for public engineering projects and infrastructure buildings.

When must you use a 30-40 micron galvanized anchor rather than standard galvanizing?

When installation takes place outdoors, in a humid industrial environment, or in areas exposed to weather near the coastline, a standard electro-galvanized coating (about 5 micron) is not sufficient and may corrode quickly. In these cases the thermodiffusion galvanizing (Sherardizing) of the MTP-G produces a uniform, thick 30-40 micron protective layer that provides phenomenal resistance to rust and prevents structural failures for decades even in aggressive environments.

Is it mandatory to clean the drilled hole before inserting a wedge anchor?

Yes. Although a mechanical anchor is slightly more forgiving than a chemical anchor regarding dust, drilling dust at the bottom of the hole will prevent the wedge anchor from reaching the required installation depth and may interfere with the proper opening of the expansion clip against the concrete walls. Always vacuum or blow out the dust before inserting the anchor.

How do you correctly install a galvanized wedge anchor into concrete?

Installation takes less than a minute: drill a hole at the exact diameter of the anchor, clean the drilling dust, insert the cone anchor (with the nut and washer mounted to protect the thread) using a hammer to the marked depth, and tighten the nut with a torque wrench to the exact value specified by the manufacturer. Over-tightening may damage the anchor or the concrete.

Can a wedge anchor be pulled out after installation?

No. A wedge anchor is designed for permanent, one-time anchoring. Once the nut is tightened and the clip locks into the concrete, it cannot be pulled out without destroying the surrounding concrete. To dismantle a fixture, remove the nut and washer and cut the protruding part of the anchor down to the concrete surface.

Can a wedge anchor be installed in hollow blocks or Ytong?

No. A wedge anchor generates enormous expansion pressure on the walls of the drilled hole. Installing it in a hollow block, cinder block or lightweight concrete (Ytong) will cause the block to burst from the inside and the anchor will pull out easily. For blocks, use a suitable plastic plug, a dedicated block anchor, or a chemical anchor with a mesh sleeve.

Not sure which wedge anchor is right? Tell us the concrete type, the load and the environment — our engineers will recommend the correct model, diameter and finish.

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MTP-G Wedge Anchor – Hot-Dip Galvanized