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# Design lap length l0

## Eurocode 2 part 1-1: Design of concrete structures \$(document).ready(function () { var freeExample = \$("#freeExample").length; \$("#mainMenu li#nav-appCate, #mainMenu li#nav-appEC211").addClass("active"); var proUser = false === true || false === true || freeExample !== 0; if (!proUser) { \$('#Input input').keyup(function(){ \$('#AlertSubscribe').modal(); }); \$('#Input select').change(function(){ \$('#AlertSubscribe').modal(); }); }; var tempInput = \$("#tempInput").text(); if (tempInput != "") { \$("#Input").parent("form").deserialize(tempInput); if (proUser) { \$("#acceptBtn").trigger("click"); } }; });  8.7.3 (1)

The design lap length is:

 l0 = α1 α2 α3 α5 α6 lb,rqd  ≥ l0,min (8.10)

where:

α1, α2, α3 and α5 may be taken from Table 8.2; however, for the calculation of α3, ΣAst,min = As(σsd/fyd).
α6
= (ρ1/25)0,5;   1,0 ≤ α6 ≤ 1,5
where ρ1 is the percentage of reinforcement lapped within 0,65⋅l0 from the centre of the lap length considered.
lb,rqd
is the basic required anchorage length
l0,min
is the minimum lap length
 l0,min ≥ max{0,3α6lb,rqd; 15Φ; 200 mm} (8.11)
where Φ is the bar diameter.

This application calculates the lap length l0 from your inputs. Intermediate results will also be given.

Input
mm
%
mm

Output
α6
l0,min
mm (8.11)
the lap length l0
mm (8.10)