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

A load dispersion-type indoor lifting apparatus for a prefabricated steel structure, 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 comprises a plurality of outrigger supports being coupled to protrude outside of the outer edge of the support frame,
• wherein each of the plurality of stacker systems comprises a pair of front outriggers,
• wherein when the lifting frame is raised, and the support frame is fixed in position as the pair of front outriggers of the stacker system pushes down an outrigger support of the support frame, thereby the support frame and the lifting frame being separated from each other,
• wherein the pair of front outriggers pushes the plurality of outrigger supports of the support frame down, thereby distributing sequentially a load applied to the stacker system to the entire support frame and the entire moving cart,
• wherein the plurality of outrigger supports receive a load applied to the stacker system through the pair of front outriggers of the stacker system, and distribute the load applied to the stacker systems sequentially to the entire support frame and the entire moving cart, and
• wherein the support frame and the lifting frame are configured to partially overlap each other when coupled, such that a total thickness of an assembly of the support frame and the lifting frame is less than a sum of an actual thickness of the support frame and an actual thickness of the lifting frame.