The single-span structure should be hoisted from the side of the span to the other side, the middle to the
ends, or both ends to the middle. For multi-span structures, it is advisable to first hoist the main span and the
rear hoisting span; when there are multiple cranes working together, it is also possible to hoist at the same
time. The single-layer portal frame steel structure should be installed in the order of columns, tie beams, inter-
column supports, crane beams, roof trusses, purlins, roof supports, and roof slabs.
During the installation process of the portal frame structure, it is necessary to install the temporary column
support or stabilize the cable wind rope in time, and expand the installation after forming the space structure
stability system. The spatial structural stability system shall be able to withstand the effects of structural self-
weight, wind load, snow load, seismic action, installation load and impact load during lifting.