The scope of the portal steel frame is light industrial construction, bridgeless crane or single-story steel structure with only medium and light working bridge cranes or 3t overhead cranes with a weight of no more than 20t. Due to the thin thickness of the portal steel frame, it is not suitable for use in environments with strong corrosive media.
According to the type of structure, the portal steel frame can be divided into single-span, double-span, multi-span rigid frame and steel frame with provocative and adjacent housing. The connection between the middle column and the inclined beam of the multi-span steel frame is generally hinged. Multi-span steel frames should be double-slope or single-sloping roofs, and if necessary, multi-span steel frames consisting of multiple double-sloping roofs. The cross section of the mast can be an equal section or a variable section, and the column legs are generally hinged or steel.
The basic structure is composed of the gantry cross support connecting rod hanging buckle type scaffolding board or the horizontal frame locking arm, and then the horizontal reinforcing rod, the scissors support, the sweeping rod, the sealing rod, the bracket and the base are adopted, and the wall part and the main structure of the building are adopted. A standardized steel pipe scaffolding connected.