This invention discloses a sliding hinge support and construction method for a prefabricated staircase, relating to the field of prefabricated
building construction technology. It involves setting up multiple guide components, multiple
infill bodies, a sliding mechanism, and a shock-absorbing mechanism, so that the upper and lower ends of the prefabricated staircase are both supported on an external load-bearing beam. The guide components pass through sliding holes and extend into the
infill space, and the top of the guide components is fixed to the prefabricated staircase by the
infill bodies. The prefabricated staircase is not rigidly welded or bolted to the load-bearing beam, but rather a sliding surface composed of sliding components is provided. The prefabricated staircase can then slide horizontally with a low
coefficient of friction relative to the infill components (i.e., relative to the external load-bearing beam) through the sliding medium layer in the sliding components. This relative sliding displacement releases the deformation constraints at the connection nodes, avoiding
stress concentration at the nodes caused by forced displacement. The sliding
stroke provided by the sliding components effectively absorbs inter-story displacement, protecting the main structure of the prefabricated staircase and the connection nodes from damage.