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# Columns: the minimum area of longitudinal reinforcement following the EN Eurocode recommendation, As,min

## 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"); } }; });  9.5.2 (2)

The recommended value for the minimum area reinforcement As,min is:

 As,min = (0,10 NEd)/fyd  ≥ 0,002 Ac (9.12N)

where:

NEd
is the design axial compression force
fyd
is the design yield strength of the reinforcement, fyd = fyk/γS
see § 2.4.2.4 (1) for the values of γS,
see § 3.2.2 (3)P for the uper limit of fyk
Ac
is the area of concrete cross section.

This application calculates the minimum area of reinforcement As,min from your inputs.

Input
kN
MPa
cm2
Output
the minimum area of reinforcement As,min
cm2 (9.12N)