Load dispersion-type indoor lifting apparatus for prefabricated steel structure and method of installing prefabricated steel structure by using same

A method of installing a prefabricated steel structure by using the load dispersion-type indoor lifting apparatus, the apparatus comprising:

• a moving cart;
• a support frame configured to be mounted on the moving cart;
• a lifting frame configured to be mounted on the support frame;
• and
• a plurality of stacker systems configured to lift the lifting frame in an upward direction while pushing the support frame down,
• wherein the support frame and the lifting frame are configured to partially overlap each other when coupled, such that the total thickness of the assembly of the support frame and the lifting frame is less than the sum of an actual thickness of the support frame and an actual thickness of the lifting frame,
• the method comprising:
• obtaining an assembly by mounting the lifting frame onto the support frame (S10);
• by operating the moving cart, bringing the moving cart under a lower part of the assembly, and then attaching the lower part of the assembly and an upper part of the moving cart to each other (S20);
• by operating the moving cart, moving the assembly under a lower part of a prefabricated steel structure, and then attaching the lower part of the prefabricated steel structure and an upper part of the assembly to each other (S30);
• and
• arranging the plurality of stacker systems in a row on one side and the other side of the assembly (S40).