How many square pipes are used in the pillars of the construction site?

Use 200*200 for columns and 198*99 for sides. The standard is 200* 100. A short time is enough. Because steel structure columns usually use H-beam, especially in workshop equipment rooms, square pipes are generally used in positions such as door post openings, and C-beam generally refers to purlins, which are used as the support of roof panels on roofs or walls, and channel steel angles are generally used in support positions, and I-beams are generally used in crane beams; For example, Shangdu is the usual method of factory design, mainly considering economic factors, and relatively reasonable design, of course, depends on the specific requirements of the project. There is no conclusion, some require beautiful appearance, and the column will be square steel or round steel.