Post-installed rebar end anchorage design to EOTA TR 069

AnchorDesign360™ designs reinforcing bars drilled and bonded into existing concrete and anchored at their end — for example tying a new slab into an old wall — to EOTA TR 069, the European assessment method for post-installed rebar acting as an anchorage (EAD 332402). It is one of three design modules in the tool: base plate fixings to EN 1992-4, rebar end anchorages to TR 069 and lap splices to TR 023 through EN 1992-1-1. It runs live in the browser with a 3D model, and no account is needed to design.

What you enter

You first pick the application: wall to slab, column to slab, slab to wall, beam to wall, beam to column, or a single rebar. The inputs adapt to it:

Product and base material — the adhesive product and curing speed, the bar diameter and bar grade f_yk, the existing concrete class and, optionally, the new concrete class, the temperature range, cracked or uncracked concrete, and the working life (50, 100 or 120 years). These select the bond values from the product’s ETA.
Layout and embedment — the bar grid n_x × n_y, the embedment (anchorage) length, the spacings s_x / s_y, and the edge distances x₁, x₂, y₁, y₂ from the bar centres in the existing member.
Covers and joint — the side cover c_x and top or bottom cover c_y to the bar centre, the bar spacing c_s, the new member size, and the interface: an optional interface shear check to EN 1992-1-1 6.2.2/6.2.3 or 6.2.5 (or transferred externally), shear reinforcement in the new member, joint roughness (very smooth, smooth, rough, indented), and the ΔF_td tension-chord shift.
Transverse reinforcement — dense existing reinforcement, and an explicit definition of the transverse reinforcement: stirrup diameter, number n_t, area A_st, spacing s_b, bars in the surface n_b, and the k_m factor per Fig. 4.2.
Loads — the design method (EOTA TR 069 by default, or EN 1992-1-1), design for yield, γ_Rd, the design actions N, V_x, V_y, M_x, M_y, the sustained-load ratio α_sus, the transverse pressure p_tr, and optional compression-zone overrides (lever arm z and |C_Ed| / N_Ed).
Installation — bond condition (good, η₁ = 1.0, or poor, 0.7), drilling method (hammer, diamond or compressed air), hole condition, and whether a drilling aid was used (Table 1.2).

Each input carries a small ⓘ ring explaining what the field means and how it changes the result.

What it checks

The engine checks the anchorage against every way it could fail and reports each one:

Steel — the bar itself yielding or breaking.
Bond / pull-out — the mortar losing grip and the bar sliding out, using the product’s ETA bond strength for your concrete class, temperature range, working life, cracked or uncracked condition and drilling method.
Concrete cone — a cone of concrete breaking away around the anchored bars in the existing member.
Bond-splitting — the concrete splitting along the bar, including the bond-splitting check of the most-loaded single bar per TR 069 Table 4.1.
Anchorage length — whether the bonded length is long enough to develop the bar force.
Interface shear at the joint, when you switch the check on, to EN 1992-1-1.

For each mode the engine works out the resistance, compares it with the acting load and reports the utilisation. The design passes only if every mode is at or below 100 %, and the governing mode is called out so you know what is driving the design. Every result names the clause it came from.

What you get

Live results and 3D model — the exact geometry being solved (members, bars, load arrows, breakout cones), updating with the results.
Product comparison — the Comparison panel runs your exact anchorage against every product in the catalogue, from multiple manufacturers, at once. Products holding an EAD 332402 assessment use their own approved values; products without one are reported as not applicable or, where conservative substitute bond parameters exist, flagged TR 069* as a lower-bound estimate.
Design-space graphs — resistance against embedment depth, with your current depth marked, so you see how much deeper you must go, 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 it needs an account.

Open AnchorDesign360

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

Frequently asked questions

What is a post-installed rebar end anchorage?

A reinforcing bar drilled and bonded into existing hardened concrete with a chemical mortar and anchored at its end, so that a new member can be tied into an old one — for example a new slab into an existing wall.

Which standard does AnchorDesign360 apply to end anchorages?

EOTA TR 069, the European assessment method for post-installed reinforcing bars acting as an anchorage, based on EAD 332402. EN 1992-1-1 can be selected as the design method instead. Every result names the clause it came from.

What happens if a product has no TR 069 assessment?

Products without an EAD 332402 assessment are either reported as not applicable, or, where the tool provides conservative substitute bond parameters, they are marked TR 069* in the results as a lower-bound estimate rather than ETA-declared data.

Can TR 069 be used for a frame corner?

No. EOTA TR 069 is valid only in continuous joints. A beam-to-column frame corner (L-joint) must be designed with the EN 1992-1-1 strut-and-tie method, and the tool says so.

Do I need an account to design an end anchorage?

No. Designing, comparing products and viewing the graphs are open without an account. An account is needed only to export the PDF report.

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.