How to quickly and accurately predict the section dimensions of steel columns and beams in portal frames?

Portal frames are mostly used in single-storey industrial buildings, and their roof loads (except wind load in coastal areas and snow load in cold areas) are not much different. According to the span of the frame, the maximum height of the section (column top and beam end) can be estimated by 1/30- 1/34. The top of the column foot and the figure-eight beam are mostly designed as hinges, which can be sized by structure.