This online tool calculates the anchor length of a bar based on the formulation of the EC-2.
| Geometric characteristics | |||
| Bar diameter (Φs) (mm): | Rebar shape | ||
| Cd value (See figure) (mm): |  |
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| coefficient related to the quality of the bond condition and the position of the bar during concreting (η1) (see figure below-Good/poor conditions): |
Value:
η1 = 1.0 when ‘good’ conditions are obtained; η1 = 0.7 for all other cases and for bars in structural elements built with slip-forms, unless it can be shown that ‘good’ bond conditions exist |
Coefficient related to the bar diameter (η2): |
Value:
η2 = 1.0 for φ ≤ 32 mm; η2 = (132 - φ)/100 for φ > 32 mm; |
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| Concrete characteristics | |||
| Concrete tensile characteristic strength (fctk,0,05) (MPa): | Concrete partial factor: (γc) |
Typical values:
Persistent & Transient situation:1.5; Accidental situation:1.2; |
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| Long term effects on the tensile strength (α,ct) (MPa): | |||
| Steel characteristics | |||
| Design stress of the bar (σs) (MPa): | Tension or compression: | ||
| transverse reinforcement along the design anchorage length | |||
| Not welded transverse reinforcement? |
Information:
In case of doubt, keep the "No" option, is conservative; |
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| Welded transverse reinforcement? |
Information:
In case of doubt, keep the "No" option, is conservative; |
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| Transverse pressure along the anchorage length | |||
| Is there transverse pressure along the anchorage length?: |
Information:
Compression stresss on the concrete where the rebar is anchored, increasing the contact between the rebar and tbe concrete In case of doubt, keep the "No" option, is conservative; |
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| Alfa values automatic calculated | |||||||||
| α1 value: | α2 value: | α3 value: | α4 value: | α5 value: | |||||
| Results: | |||
| Required anchor length - Lbrd (mm) | Automatic calculation after introducing all the input data | ||
| Intermediate values for anchor length calculation |
