Articles & Installation Guides
Professional guides, comparisons and field know-how on anchoring, chemical anchors, concrete screws, fasteners and safe installation — from the Adit engineering team.
Cracked Concrete & Seismic Design
5
Jul 2026Cracked or uncracked concrete? BBA Guidance No. 39
Cracked or Uncracked Concrete? BBA Guidance No. 39 Deciding whether to treat concrete as cracked or uncracked is one of the most consequential choices in anchor
Jul 2026Where are the cracks in the definition of “cracked concrete”?
Where are the cracks in the definition of “cracked concrete”? Classifying concrete as cracked or uncracked is one of the most expensive decisions in an anchor
Jul 2026Cracked concrete and anchoring: frequently asked questions
Cracked Concrete and Anchoring — Frequently Asked Questions The full guide: anchoring and cracked concrete, in a question-and-answer format. What actually counts as “cracked concre
Jul 2026How to interpret seismic approval for anchors
Seismic Approval for Anchors: How to Read It Demand for seismic approval of anchors keeps growing — but an approval only tells you that an anchor
Jul 2026Combining the Israeli safety-factor requirement with European anchor design
Combining the Israeli Safety-Factor Requirement with European Anchor Design Several Israeli standards demand a fixed safety factor of 4 against the failure load of an anchor.
Choosing & Installing Anchors
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Jul 2026How to calculate the load capacity of a bolt and nut
How to Calculate the Load Capacity of a Bolt and Nut — Full Design Guide to EN 1993-1-8:2005 (Section 3.8) Eurocode 3’s core standard for steel-structure
Jul 2026Crooked anchors: common questions about incorrectly installed anchors
Common Questions About Crookedly Installed Anchors Installing anchors in a non-standard way is almost the norm in the field. That is perhaps also why the standards
Jul 2026How to Choose the Right Anchor — A Guide to the Differences Between Plugs and Anchors
How to Choose the Right Anchor — A Guide to the Differences Between Plugs and Anchors Choosing an anchor is not a decision to leave to
Jul 2026The Real Difference Between a Plug, a Toggle, an Anchor and a Jumbo
Making Sense of Fixings: The Real Difference Between a Plug, a Toggle, an Anchor and a Jumbo Professionals — and certainly amateurs — often use the
Jul 2026Which Anchor or Nylon Plug Is Most Suitable? A Guide to Choosing
A Guide to Choosing Anchors (Plugs) and Anchoring Solutions Choosing an anchor is not a decision to leave to luck. An unsuitable anchor can break, tear
Jul 2026Wedge anchor or concrete screw: which should you use, and when?
Wedge Anchor or Concrete Screw: Which Should You Use, and When? Mechanical anchors are a critical component in structural engineering, infrastructure and building safety. This is
Jul 2026Why the Jumbo anchor is the wrong choice in most applications
Why the Jumbo Anchor Is the Wrong Choice in Most Applications Most small contractors and renovators in Israel reach for the Jumbo (bulky sleeve) anchor by
Chemical Anchors & Rebar Dowels
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Jul 2026Chemical or Mechanical Anchor: What’s the Difference and Which Is Better?
Chemical Anchor or Mechanical? What’s the Difference and Which Is Better? Construction and renovation sometimes call for especially strong fixings — ones an ordinary bolt and
Jul 2026What is a chemical anchor, and what types are there?
What Is a Chemical Anchor, and What Types Are There? To make a connection in construction you have two options: a mechanical one or a chemical
Jul 2026How to choose the right chemical anchor
Choosing the Right Chemical Anchor: Materials, Technologies and Safe Design A chemical anchor is only as good as the material, the specification and the installation behind
Jul 2026Underwater (chemical) anchoring: how to design it and how to install it
Underwater Chemical Anchoring: How to Design and Install It In ports, swimming pools and water-logged sites, anchors often have to be installed below the waterline —
Jul 2026Why You Must Not Install a Chemical Anchor in Fresh Concrete
Why You Must Not Install a Chemical Anchor in Young Concrete — the Physics Behind the Rules A detailed look at how concrete gains strength, what
Jul 2026A rock anchor to fix DYWIDAG bars? Think again
A Rock Anchor to Connect a DYWIDAG Bar? Think Again! It is common practice to use a rock anchor to connect a DYWIDAG bar to bored
Jul 2026Epoxy Adhesive for Rebar Dowels: The Perfect Solution for Professional Construction
Epoxy Adhesive for Rebar Dowels: The Perfect Solution for Anchoring in Professional Construction In modern construction, epoxy adhesive for rebar dowels is one of the most
Jul 2026What Is Epoxy Adhesive for Anchoring, and How Does It Work?
What Is Epoxy Adhesive for Anchoring, and How Does It Work? In modern construction, epoxy adhesive for rebar dowels is one of the most advanced and
Jul 2026The Watertightness of Epoxy Adhesives and Their Use in Underwater Applications
The Watertightness of Chemical Adhesives and Their Use in Underwater Applications Advanced chemical adhesives — epoxy adhesives foremost among them — are considered one of the
Jul 20263 Methods for Calculating Post-Installed Rebar with Chemical Adhesive — a 25× Gap
Chemical Anchoring to Concrete: Three Calculation Methods, a 25× Gap in the Result Three completely different methods are used in Israel to calculate rebar dowels set
Jul 2026A Dangerous Deception in the Adhesive Market: Epoxy-Acrylate Sold as Epoxy
A Dangerous Deception in the Adhesive Market: Selling Epoxy-Acrylate as Epoxy Epoxy-based adhesives and epoxy-acrylate adhesives are among the most common materials for anchoring d
Nylon Plugs & Wall Fixings
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Jul 2026Why use a bad plug when you can use a good one?
Why Use a Bad Plug When You Can Use a Good One? Choosing the wrong anchoring element is one of the most common causes of structural
Jul 2026What are wall plugs made of, and why does it matter?
What Are Wall Plugs Made Of, and What Is the Advantage of Each Material? Wall plugs (wall anchors) are small but vital components in construction, infrastructure
Jul 2026How to identify your wall and choose the right plug
How to Identify Your Wall Type and Match the Right Anchor Identifying the wall type is the first and most critical step before you drive a
Jul 2026How to choose the right plug for wall-mounting a TV
Mounting a TV on the Wall: Identify the Wall, Choose the Right Plug Plenty of people buy a television with the plugs meant for a concrete
Jul 2026Hanging a cabinet on a block wall: which plugs, and how
Hanging a Cabinet on a Block Wall with Plugs — A Professional Installation Guide Hanging a wall cabinet is a task that demands precision, the right
Jul 2026Which plug is best for plasterboard walls?
Which Plug Is Best for Plasterboard Walls? Plasterboard has a weak, crumbly core — so the anchor’s mechanism matters more than its size. A comparison of
Jul 2026Rosett Anchor or BA-NY Plug? Choosing a Drywall Fixing
Rosett Anchor or BA-NY Plug? Choosing a Drywall Fixing The BA-NY toggle plug versus the red Rosett anchor for plasterboard — a direct comparison of recommended
Stone Cladding
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Jul 2026What anchor is suitable for my stone cladding?
What Anchor Is Suitable for My Stone Cladding? Stone cladding — natural or artificial — has to be anchored to the wall behind it. In Israel
Jul 2026How to design an anchor connection in a natural stone wall
Designing an Anchor Connection in a Natural Stone Wall Concrete is a uniform material with clearly defined properties, so connections can be designed fairly precisely. A
Jul 2026Which blocks are better for anchoring stone cladding?
Which Blocks Are Best for Anchoring Stone Cladding? On many sites the block is chosen for thermal insulation, acoustics or cost — with no thought for
Steel, Hollow Sections & Hollow-Core Slabs
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Jul 2026How to Make a Steel-to-Steel Connection
How to Make a Steel-to-Steel Connection? How do you connect two profiles together, and what are the advantages and disadvantages of each method? Here is a
Jul 2026StrutBolt’s improved version of Boxbolt!
StrutBolt — The Improved Version of Boxbolt Two trade names for the same engineering family of expanding blind-fastening anchors — but the official ETA figures show
Jul 2026Which Anchor for Hollow-Core (Spancrete) Slabs — Standard and Efficient?
Which Anchor for Hollow-Core (Spancrete) Slabs — Standard and Efficient? A professional guide comparing four ADIT anchoring solutions for prestressed hollow-core (Spancrete / Spien
Jul 2026EASY, HC or TFF: The Best Anchor for Hollow-Core (Spancrete) Slabs?
Anchoring to Hollow-Core (Spancrete) Slabs: MKT Easy vs Adit HC vs TFF Concrete Screw A comprehensive comparison of the three most common anchoring solutions in Israel
Self-Drilling Screws
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Jul 2026What is a self-drilling screw?
What Is a Self-Drilling (Cladding) Screw, and How Much Does It Hold? An engineering guide to self-drilling screws for steel and cladding — loads, metallurgy and
Jul 2026How to choose a self-drilling screw
Engineering Guide: Self-Drilling Screws for Steel and Cladding — Correct Selection and Design Data Connecting corrugated cladding sheets, sheet-metal panels and structural profiles
Jul 2026The history of the self-drilling screw – and why Israel calls it a “borg isqurit”
The History of the Self-Drilling Screw — and Why Israel Calls It a “Borg Isqurit” The screw is one of the six classical simple machines, but
Jul 2026DIN 7504 – the standard for self-drilling (cladding) screws
DIN 7504 — The Standard for Self-Drilling (Cladding) Screws DIN 7504 is one of the most common and important standards in the world of fasteners, defining
Jul 2026The Silent Guard: Why EPDM Is Critical When Connecting Different Metals
The Silent Guard: Why the EPDM Washer Is Critical When Connecting Dissimilar Metals In construction and installation, the smallest details are sometimes what decide whether a
Anchor Points for Work at Height
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Jul 2026Which type of anchoring points are better?
Which Type of Anchor Point Is Better? — The 4 Categories of Concrete Work-at-Height Anchors Anchor points for work at height on concrete divide by how
Jul 2026Anchor Points for Work at Height: The Complete Guide to Safety, Standards and Signage
Anchor Points for Work at Height: The Complete Guide to Safety, Standards and Signage Work at height is one of the most dangerous activities in construction
Jul 2026The Most Common Online Questions About Work-at-Height Anchor Points
The Most Common Questions on the Web About Work-at-Height Anchor Points The questions people ask most about fall-protection anchor points centre on the legal requirements, load
Jul 2026What Loads Does EN 795 Require of a Work-at-Height Anchor — and Why?
What Loads Does EN 795 Require of a Work-at-Height Anchor — and Why? Where the numbers come from: the physics of a fall, the static test
Jul 2026Signage Required Under EN 365 for an EN 795 Work-at-Height Anchor Point
Signage Required Under EN 365 for an EN 795 Work-at-Height Anchor Point Below are the markings EN 365 requires on personal protective equipment (PPE), including a
Testing, Loading & Performance
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Jul 2026Pull-out testing of anchors with a torque wrench
Pull-out Testing of Anchors with a Torque Wrench Applying a known torque and checking that an anchor does not move is a fast, cheap field check
Jul 2026When Do You Need a Pull-Out Test for Anchors?
When Do You Need a Pull-Out Test for Anchors? Pull-out tests for anchors — when are they essential, and when are they redundant? The answer depends
Jul 2026Maximum tightening torque for bolts and nuts
Maximum Tightening Torque for Bolts and Nuts Torque tables by strength class and steel type, plus the correction factors that matter most in the field. The
Jul 2026Bolt and nut tightening test methods – the On-Off-On method
Bolt and Nut Tightening Test: the On-Off-On Method When you tighten a bolt, only about 10 to 15% of the torque actually becomes clamping force —
Jul 2026How anchors behave under blast loading
How Anchors Behave Under Blast Loading Anchors do not behave the same way under static and dynamic loads. Under an explosion, some anchors weaken dramatically while
Product Comparisons
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Jul 2026ADIT TFE/TXE vs Hilti HUS4/HUS4-HR: Which Concrete Screw Is Better?
Concrete Screws, Material for Material: ADIT TFE/TXE vs Hilti HUS4/HUS4-HR The sensible comparison pairs like with like: carbon-steel screw against carbon-steel screw, A4 stainless
Jul 2026ADIT TFE vs Würth W-BS: Which Concrete Screw Is Better?
Concrete Screws Compared: ADIT TFE vs Würth W-BS A standards and characteristic-load comparison (NRk / VRk) in tension and shear — galvanised carbon steel, static /
Jul 2026Chemfix 100 vs Hilti HIT-RE 500 V3: Which Adhesive Is Better?
Chemfix 100 (Adit) vs Hilti HIT-RE 500 V3 — Injection Adhesive Comparison Two injectable epoxy adhesives, two valid European approvals (ETA), the same design standard —
Jul 2026Which Adhesive Is Better: Adit Chemfix200 or Würth WIT-VM250?
Which Adhesive Is Better — ADIT Chemfix200 or Würth WIT-VM 250? Choosing a chemical adhesive for structural projects means relying on proven laboratory data from the
Jul 2026ADIT SLPT vs Hilti HSL4: Which Dynamic Anchor Is Better?
ADIT SLPT vs Hilti HSL4 — Heavy Sleeve Anchors: Standards and Design Resistance A full comparison of two heavy torque-controlled sleeve anchors: their standards and approvals,
Jul 2026Is the Hilti Dynamic Set Engineering-Justified — or Just Marketing?
Filling the Annular Gap in Through-Profile Chemical Anchoring The simple, reliable and visually verifiable way to fill the gap — using the anchor’s own adhesive, with
Jul 2026ADIT NA-G vs Fischer FNA II H — Nail Anchor Comparison
Anchoring for Anti-Pigeon Netting: ADIT NA-G or Fischer FNA II H? Two nail-in anchors, one European approval standard. A direct, data-based comparison of the ADIT NA-G
Jul 2026Which nylon plug is better than Adit GX-L or Fischer Duopower?
Which Block Plug Is Better — ADIT GX-L or Fischer DUOpower? In the anchoring world, fixing to light, hollow substrates — such as black block, pumice
Published research
Preprints from the Adit engineering team, deposited on Zenodo with registered DOIs and released under CC BY 4.0. Free to read, download and cite.
The Shared-Volume Anchorage Method
Revision 2 · English and Hebrew editions
Yves De Lathouwer · Adit Ltd
EN 1992-4 has no clause for two anchor plates on perpendicular faces of the same corner, nor for a channel section wrapping a member on three sides. This paper sets out the method used in AAS for both cases: competition between anchorages is treated as a question of volume rather than of area, each failure body is integrated numerically over the concrete, and the fraction that is neither shared with a stronger neighbour nor outside the member becomes a reduction factor r. Includes a fully worked calculation in annex.
Where Are the Cracks in the Definition of “Cracked Concrete”?
Yves De Lathouwer · Adit Ltd
EN 1992-4 defines the reference crack by its width and says nothing about its depth, so a shallow surface crack and a crack through the full section are classified alike — while the qualification tests behind the classification reproduce a crack that traverses the whole anchorage. This paper asks whether the near-universal cracked default is proportionate to the evidence, recovers the probabilistic reading of BBA Guidance No. 39, and proposes a criteria-based framework in its place.