Method A — Full Design Method
Method A is the complete verification procedure covering all failure modes with detailed calculations. It provides the highest accuracy and is required for final design verification.Procedure
The method follows these steps:-
Determine effective geometry
- Embedment depth (hef)
- Edge distances (c1, c2)
- Spacing (s)
- Member thickness (h)
-
Calculate characteristic resistances
- Steel: NRk,s, VRk,s
- Concrete cone: NRk,c
- Pullout: NRk,p
- Splitting: NRk,sp
- Edge: VRk,c
- Pryout: VRk,cp
-
Apply reduction factors
- Area ratios (Ac,N/A°c,N)
- ψ factors (edge, spacing, eccentricity, etc.)
-
Apply partial safety factors
- NRd = NRk / γM
- VRd = VRk / γM
-
Verify design condition
- NEd ≤ NRd for all tension modes
- VEd ≤ VRd for all shear modes
-
Check interaction
- Combined tension-shear if applicable
Why Method A
| Advantage | Benefit |
|---|---|
| Most accurate | Reflects actual anchor behavior |
| All failure modes | No modes overlooked |
| Geometric effects | Accounts for edges, spacing, thickness |
| Optimised designs | Avoids unnecessary conservatism |
| Full documentation | Complete audit trail for approvals |
EN 1992-4 also defines simplified methods (B and C) for quick checks, but these are conservative and limited in scope. Clariti uses Method A exclusively to ensure accurate, optimised designs.
How Clariti Implements Method A
Clariti automates the full Method A procedure:- Automatic geometry analysis — Determines all relevant distances and checks constraints
- Complete mode checking — Verifies all applicable tension and shear failure modes
- Factor calculation — Computes all ψ reduction factors with justification
- Interaction verification — Checks combined loading per EN 1992-4 Section 7.2.3
- Transparency — Documents every step with EN 1992-4 clause references
- Fully compliant with EN 1992-4
- Optimised for the specific geometry
- Documented for approval