摘要：

The present invention discloses a steel frame using a U-shaped composite beam that can improve the workability and structural performance of the joint portion and the small beam joint and the small beams. Steel frame according to the present invention, in the steel frame consisting of a pillar, a large beam bonded between the pillars and a small beam bonded between the large beams, the pillars are joined to both ends of the bottom plate and the bottom plate for bonding to the large beams In the U-shaped plate consisting of a side plate extending at right angles in the upward direction and a support plate extending outwardly from each side plate, a vertical plate welded in parallel to the side plate in the center of the bottom plate of the U-shaped steel plate, A bracket consisting of a horizontal plate welded in parallel with the bottom plate of the U-shaped plate is joined at the top, and the large beam has a U-shaped cross-sectional shape as a whole, and the central abdominal plate and the upper flange plate are joined at both ends to join the bracket. The upper surface is provided with a space maintaining member at regular intervals over the entire length, and the beam splice is coupled to the position where the small beams are joined, the small beams, Consisting of a minor flange plate, a side abdominal plate extending at right angles from both ends of the lower flange plate, and a mounting plate extending outwardly in parallel with the lower flange plate at one end of the side abdominal plate, and joined to a large beam through a joint The upper surface is provided with a space keeping member over its entire length, and concrete is filled in the large beams and the small beams.

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