Base plate anchor design to EN 1992-4

AnchorDesign360™ designs bonded anchors fixing a steel base plate to concrete — a column base plate, a bracket — to EN 1992-4:2018, using each product’s own European Technical Assessment (ETA) data. It is one of three design modules in the tool: base plate fixings (EN 1992-4), post-installed rebar end anchorage (EOTA TR 069) and lap splices (EOTA TR 023 through EN 1992-1-1). It opens straight into a solved base plate example and recalculates as you type with a live 3D model; an account (email verification) is needed to save and export your design.

What you enter

The inputs run down the left of the screen and adapt to the base plate connection type:

Product and base material — the adhesive product and curing speed, the rod grade (or a custom f_uk / f_yk), the existing concrete class, the temperature range, cracked or uncracked concrete, and the working life (50, 100 or 120 years). These select the approved values from the product’s ETA.
Layout and embedment — the number of anchors (single, a row of 2 or 3, or a 2×2, 3×2 or 3×3 group), the embedment depth, the spacings s_x / s_y, and the edge distances x₁, x₂, y₁, y₂ from the anchor centres (left empty when the edge is far).
Base plate and stand-off — the plate dimensions b_x / b_y and thickness t, and the stand-off installation type: no stand-off, stand-off without clamping, with clamping, or with grout, plus the stand-off distance.
Reinforcement — whether the crack width is limited (w_k ≤ 0.3 mm), edge reinforcement, and supplementary reinforcement for tension (stirrups or loops around the fastener) and for shear (surface reinforcement per Fig. 7.10 a, or stirrups and loops at the fastener per Fig. 7.10 b, c), with their diameter, number, cover and the reinforced edge.
Loads — the design actions on the plate: N, V_x, V_y, M_x, M_y and the torsion M_z, together with the sustained-load ratio α_sus.
Installation — the hole condition, because the anchor ETA data is keyed to it.

Each input carries a small ⓘ ring explaining what the field means and how it moves the result, backed by the official EN 1992-4 figures.

What it checks

The plate loads are distributed to the anchors with a rigid-plate model — compression-only concrete under the plate and tension-only anchor springs — and the group is then verified against every failure mode in EN 1992-4:

Steel — the anchor rod yielding or breaking, in tension and in shear.
Combined pull-out and concrete failure (bond) — the adhesive losing grip, using the product’s ETA bond strength for your concrete, temperature range, working life and cracked or uncracked condition.
Concrete cone — a cone of concrete breaking away around the tensioned anchors.
Splitting — the concrete splitting along the anchor.
Concrete edge and pry-out under shear — the concrete failing at a free edge or levering out behind the anchor.
Tension–shear interaction — combining the two directions per the code’s interaction equations, including the case where reinforcement covers one direction only.

For each mode the engine works out the resistance, compares it with the acting load, and reports the utilisation. A design passes only when every mode is at or below 100 %. The governing mode — the check closest to the limit — is called out so you know what is driving the design. Every result names the EN 1992-4 clause it came from. Where an ETA does not declare a value for a configuration, it is reported as outside the assessed scope rather than extrapolated.

What you get

Live results — every failure mode with its utilisation and the governing one highlighted, updating with the 3D model as you edit. The model shows the concrete member, the anchors, the base plate, the load arrows and the breakout cones.
Product comparison — the Comparison panel runs your exact design against every bonded product in the catalogue, from multiple manufacturers, in one table: who passes, who is borderline, and with how much margin. Products without a direct EN 1992-4 assessment are shown with clearly flagged conservative fallback values.
Design-space graphs — resistance against embedment depth, with your current depth marked, so you see how much deeper you must go to pass, or how much shorter you could go.
PDF report — the inputs, the geometry, every check with its clause reference, the governing mode and the utilisation, ready to attach to a submission. Exporting the report needs an account; the PDF is generated on demand and not stored.

Open AnchorDesign360

No login required to design and compare. An account is needed only to export the PDF report.

Frequently asked questions

Which standard does AnchorDesign360 use for base plate anchors?

EN 1992-4:2018, the European standard for the design of fastenings for use in concrete. The tool selects it automatically when you choose the base plate connection type, and every result names the clause it comes from.

Where do the product values come from?

Exclusively from each product’s published European Technical Assessment (ETA): bond strength for your concrete class, temperature range, working life (50, 100 or 120 years), cracked or uncracked concrete and hole condition. No datasheet or estimated values are used.

Do I need an account to design a base plate?

No. The calculator, the 3D model, the product comparison and the design-space graphs are open without an account. An account is needed only to export the PDF report.

Can I compare anchors from different manufacturers?

Yes. The Comparison panel runs your exact base plate design against every bonded product in the catalogue, from multiple manufacturers, and lists the utilisation and governing mode of each one.

What does the report contain?

The inputs, the geometry, every check with its EN 1992-4 clause reference, the governing failure mode and the utilisation, as a PDF you can attach to a submission.

The software supports, but does not replace, the judgement of a qualified structural engineer. Always confirm the design against the current issue of the product’s ETA.