When building a parking shed in rainy days, pay attention to the fact that the weld can't be wet. If the welding part is wet, it must be wiped with a dry cloth, and dried with oxyacetylene flame before welding to keep the weld dry and free of residual moisture. If there is water on the components during construction and hoisting, it should be removed before installation, because the components can't be painted in rainy days, and the membrane structure roof can't be constructed in rainy days and strong winds above level 5, so as to ensure the spatial stability system of the membrane structure. Shanghai Moyu Structural Engineering Technology Co., Ltd. suggests that before the rainy season and winter come, designate special personnel (4 ~ 8 people) to carry out routine inspection and maintenance of the project to ensure smooth membrane surface and drainage equipment. In case of severe weather such as gale, hail, rainstorm and heavy snow, four professional technicians shall be assigned to carry out shutdown safety inspection on the project to eliminate potential safety hazards in time.