Only the initial dimensions of the starting section are defined. In this case, the calculation algorithm begins with the section that has constant height along the bar length. As in the case of sections varying by ΔH, it is necessary to define the ΔH increment by which the next dimension will increase, as well as the maximum height Hmax.
Automatic programming by means of a parametrized group proceeds in two steps as follows:
First, all the load cases are reviewed to find the extreme bending moments at beam ends. Then, the height of extreme sections is adjusted automatically so that they meet the criterion of resistance against extreme bending moments.
Then the standard procedure of code-defined verification of a tapered beam is performed. If the verified extreme section does not meet code-defined requirements, it increases the section height by ΔH, but without changing the section at the other beam end. If, on the other hand, the section does not meet the requirements in any intermediate cross-section of the beam, then, the height values of both extreme sections are increased.
This procedure is repeated until a section that meets the relevant code-defined requirements is found.