Class 4 Sections According to CSA S16

Starting with RFEM version 6.10.0009, members with Class 4 sections can be designed according to CSA S16 (2014 and 2019) [1].
For members where both the web and flanges are classified as Class 4, design is carried out in accordance with CSA S136-16 [2].

A summary illustrating the design approach for different Class 4 sections is provided in Image 1.

1 Class 4 Sections Summary

Image 2 presents an example calculation of the factored moment resistance, M_r, using the effective section modulus.

2 Effective Section Modulus Calculation

Image 3 shows an example calculation of the factored moment resistance, M_r, using the effective yield stress.

3 Effective Yield Stress Calculation

82x

15x

Расчёт элемента класса 4 по CSA S16