1564x
004307
2020-02-10

Question

After running the design in RF‑STEEL AISC, I receive error message 1002 - Invalid cross-section of type "Channel" according to F2. What does this error mean?


Answer:
Section F2 out of the AISC 360‑16 [1] states that doubly symmetric I-Shapes and Channels that are bent about their major axis must be compact sections in order to be designed. An example of this can be seen below.


Non-compact sections cannot be designed according to F2. Image 02 shows a non-designable section.