[RC] Moment bearing capacity of T-beam with double reinforcement (Eurocode 2)

In previous post I told in a few about moment bearing capacity of rectangular section. Today I continue my "micropost" tradition and share some my motes for moment bearing capacity for T-shape (see below)

[RC] Moment bearing capacity of rectangular RC section with double reinforcement (Eurocode 2)

In this post I'll write about moment bearing capacity of rectangular RC section with double reinforcement. 

Sometimes in my working practice I need to calculate bearing capacity of existing beams. But the most common aims for RC Eurocode analysis doesn't consist any information for this case. And I try to answer on this question:)