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# RC member design for biaxial bending and axial force

In this page we discuss the results for RC design for a cantilever beam subjected to biaxial bending and axial force.

In the table below you can read the cross section parameters

And the material parameters

If you take a look to the RC member design results you will find the total area of reinforcement to be $$A_{s,tot}=29,02 cm^2$$.

You can check it by using the interaction diagrams as suggested in [1]. According to it, you need to find the following parameters

So you have to consider the interaction diagrams for the design for biaxial bending and axial force for a section with d’/h=0,10 and d’/h=0,15, showed below

It’s easy then to find the reinforcement total area

You can finally calculate the error as follows

$$\epsilon = 1-\frac{29,02}{29,16} = 0,48\%$$

WeStatiX matches the solution.

[1] A.W.. BEEBY and R.S: NARAYANAN – Designers’ guide to Eurocode 2: design of concrete structures. – Designers’ guide to EN1992-1-1 and EN1992-1-2 Eurocode 2: design of concrete structures. General rules and rules for buildings and structural fire design.